External wiring diagrams. Design of external electrical and pipe wiring Description of the scheme of external connections and connections

External wiring connection diagram (GOST 21.409-93, RM 4-6-92) is a combined diagram that shows electrical and pipe connections between devices and automation equipment installed on technological, engineering equipment and communications (pipelines, air ducts, etc.) .), outside the boards and on the boards, as well as connections between the boards, consoles, complexes or individual devices of the complexes. This diagram shows the connections constituent parts products (installations) and determines the wires, bundles, cables or pipelines that make these connections, as well as the places of their connection and input (connectors, boards, clamps, etc.). Connection diagrams (mounting) are used in the development of other design documents, first of all, drawings that determine the laying and methods of fastening wires,

bundles, cables or pipelines in the product (installation), as well as for making connections and during the control, operation and repair of products (installations).

Unlike drawings of general views, the connection diagrams of panels and consoles are performed without observing scale. The connection diagram shows all the elements and devices that make up the shield or console. At the same time, their location should approximately correspond to the actual placement in the product. Devices are depicted as rectangles or conditional graphic symbols with the display of all conclusions (contacts) for connecting conductors. The diagram indicates: for wires - brand, section and, if necessary, colors; for cables - brand, number and cross-section of cores. Wiring diagrams perform different ways, but in all cases, all contact elements through which electrical connections are made, and conductors extending from them, must be indicated. On simple diagrams, all the conductors that connect devices, devices and other elements are fully shown, and reading such diagrams does not cause difficulties.

In the case of complex devices, to simplify the execution and reading of wiring diagrams, next to the designation of each apparatus or device within the diagram, its serial number (in the numerator), starting from the first, and the reference designation (in the denominator) corresponding to the circuit diagram are put down. The ends of the conductors are marked, that is, the address designation of the second end of the wire is applied: the first number is the serial number of the apparatus; the second is the number of its output to which its end is connected. In addition, for a better understanding of the circuit and its connection with the circuit diagram, a circuit designation is placed next to the conductor.

The technical means for which the wiring connections are shown in the diagrams are depicted in a simplified way with external outlines or in the form of rectangles. Input and output elements (contacts) of devices are shown in the form of circles (for round plug connectors) or rectangles (for example, for assemblies of terminal blocks, rails with a set of terminals).

Connection diagrams in the general case should contain:

1) primary devices;

2) off-panel devices, group installations of devices;

3) shields (distribution block, DIN-rail in the cabinet), complexes;

4) external electrical and pipe wiring;

5) protective grounding and zeroing of automation systems;

6) technical requirements(instructions);

7) list of elements.

characteristic (type, brand of cable, wire, pipe, etc.) and length of wiring. Cables and wire harnesses are assigned serial numbers. Ordinal numbers cables in boxes are assigned with the addition of the letter "K".

The marking of the conductors of cables and wires on the connection and connection diagrams is affixed in accordance with the electrical circuit diagrams and the instructions of the guide material PM4-106.

For each external electrical wiring, its technical characteristics and length are given: for wires - brand, section and, if necessary, color, as well as length. The length is indicated once on the wiring line extending directly from the primary device, while indicating the total length of the wire or bundle to the point of its connection to the terminals of shields, boxes, devices. When laying in one protective tube several wires in front of the brand put down their number, for example 4PTV 2x2.5M; for cables - the brand, number and cross-section of cores and, if necessary, the number of occupied cores, which are indicated in a rectangle placed to the right of the cable data designation, as well as the length of the cables, for a pipe - diameter and length.

Near the graphic designations of connecting, broaching boxes above the shelf of the leader line, their designations and serial number are indicated, for example: KSK-8 No. 1. Under the shelf of the leader line of the junction boxes indicate the designations of the drawings of their installation.

Wires and their connections located outside must be laid
into boxes (e.g. pipes, channels, trays) with the exception of reliable
method of protected cables that can be laid without
protective box with or without the use of open
cable routes or supporting structures.

The boxes must provide a minimum degree of protection IP33 (GOST 14254).

Posting numbers are indicated in circles placed at line breaks. An example of a diagram for connecting external wiring for controlling an electric drive, shown in fig. 33 is shown in fig. 37. Here, power is supplied from the mains by cable No. 1 of the VVG brand, five-core, with a cross section of 1.5 mm2, laid in a plastic pipe 5 m long. grades PV with a section of 1.5 mm, laid in a plastic box 4 m long. Remote control of the motors from the central control panel of the ShA is carried out using a 4-core control cable KVVG with a cross section of 1.0 mm, laid in a plastic pipe 7 m long.

Connection diagrams should be made as separate documents for each block of the automated object, the installation of which can be carried out independently of other blocks. In this case, the name of the block is additionally indicated in the document name.

Connection diagrams and connection of external wiring are performed on the basis of the following materials:

Schemes of automation of technological processes;

Principal electrical, pneumatic, hydraulic circuits;

technical descriptions and operating instructions for devices and automation equipment used in the project;

Tables of connections and wiring of panels and consoles, performed in accordance with the instructions for PM4-107;

Drawings of the location of technological, plumbing, energy, etc. equipment and communications with selective and receiving devices, as well as construction drawings with all embedded and welded structures, overpasses, tunnels, channels, openings, etc. necessary for laying external wiring.

An obligatory preliminary stage of work on the implementation of wiring and connection diagrams should be: checking the availability of production technology in the drawings and engineering systems all mortgage and selective devices, necessary for the installation of primary measuring transducers on communications and equipment.

Connection and connection diagrams are carried out without observing the scale on one or more sheets of format no more than A1 (594x841) in accordance with GOST 2.301.

The actual spatial arrangement of devices and circuit elements is either not taken into account at all, or is taken into account approximately.

The thickness of lines depicting devices and circuit elements, including cables, wires, pipes, must be from 0.4 to 1 mm in accordance with GOST 2.303.

The diagrams should have the least number of kinks and intersections of wiring.

The distance between adjacent parallel wiring, as well as between adjacent images of devices and automation equipment, must be at least 3 mm.

On the connection diagrams in its upper part, and when the circuit is highly saturated with devices in the upper and lower parts, in a mirror image, a table with explanatory inscriptions is placed in accordance with Fig. 53.

The sizes of the rows of the table should be taken based on the texts of the inscriptions placed in these columns.

In the "Position" line, the positions of the devices according to the automation scheme and the positional designations of the electrical equipment assigned to it according to the electrical circuit diagrams are entered. For elements of automation systems that do not have an independent position (selective devices, etc.), indicate the position of the device to which they refer, with the preposition "to". Example: to 1a.

Below the table are depicted devices and automation tools installed directly on the process equipment and communications (primary devices, actuators).

For devices that do not have numbers of electrical external terminals (for example, junction boxes), they are depicted in the connection diagram in a simplified form as a rectangle, without terminal assemblies and without glands in accordance.

Cable trays, junction boxes, and junction boxes may allow 6 mm holes to drain water if it is expected to accumulate in these cable structures.

Open conduits and cable trays should be rigidly secured at a sufficient distance from moving parts of process equipment to reduce the risk of damage or wear. In places where the passage of people is necessary, open boxes and trays should be mounted at a height of at least 2 m above the working platform.

Cable ducts should only be used as mechanical protection.

Since cable inlets (trays), which are only partially protected, are not considered to be conduits or cable support systems, the cables used must be suitable for installation on cable trays.

Rigid metal ducts and fittings should be made of galvanized steel or corrosion resistant material and adapted to the operating conditions. It is not recommended to use various materials that, on contact, can be a source of galvanic corrosion.

In industrial machines, the following are assumed classic ways wiring between enclosures and individual elements (designations used in accordance with IEC 60364-5-523; figure 54):

Rice. 54 Cable and wire laying methods

Shown here:

B1 - boxes and cable-carrying channels for supporting and protecting wires (single-core cables);

B2 - the same as B1, but with multicore cables;

C - cables laid on walls without ducts and channels;

E - cables laid in open horizontal or vertical routes (busbars)

For thermoelectric converters, resistance thermocouples), as well as for pneumatic actuators, graphic symbols are used, adopted for these devices on automation diagrams (GOST 21.404). In the lower part of the format, off-panel devices, shields and other technical means are located. In the case of accepted design decisions, a DIN rail with a contact group is shown on the shield (Fig. 55).

Fig. 55 Fragment of external wiring diagram

When tables with explanatory inscriptions are located in the upper and lower parts of the drawing field, local control cabinets are depicted as rectangles in the middle part of the drawing. When the table is located only on top, the cabinets are depicted in the lower part of the drawing field. The name of the cabinet is indicated inside the rectangle. On parts of the cabinet connection diagram, the following is brought and applied:

Images of devices to which wiring is connected (for example,
DIN rail, switchboard pads);

Connection of cables, wires and pipes to them and their designations;

Sections of cables, pipes in accordance with the connection diagram.

Segments of cables and pipes, opposite to the connection, end with a curly bracket with reference to the designation and / or sheet number of the main set, which shows the connection diagram.

Installation drawings and connection diagrams show the relative position of devices and devices on boards and consoles and their interconnection. In the AU, there are schemes for a control cabinet for field-level equipment (Fig. 40) and external wiring for a communication cabinet (Fig. 56).

Here, Figure 56 shows the external wiring for the motor control circuit for the example discussed in Lecture 16 (Figure 52). On fig. 57 shows the connection between the relay contact group for remote control of the same motor and a discrete output device.

Rice. 57 SCADA I/O device external wiring diagram example Cabinets and layouts

The design of the cabinets, as well as the places of installation and the arrangement of devices on them, are shown in the general drawings. General view drawings must be made in strict accordance with the ESKD standard. Depending on the functional purpose of the shield and its design features sketch drawing of the cabinet contains:

Specification, which, in addition to technical means of automation, includes products for installation and installation, cables and wires;

Front view;

View of the internal planes;

Label table.

In contrast to the drawings of general views, the connection diagrams of cabinets and consoles are performed without observing scale. The connection diagram shows all the elements and devices that make up the cabinet or console. At the same time, their location should approximately correspond to the actual placement in the product. Devices are depicted in the form of rectangles or conventional graphic symbols with the display of all leads (contacts) for connecting conductors. The diagram indicates: for wires - brand, section and, if necessary, colors; for cables - brand, number and cross-section of cores. Connection diagrams are made in various ways, but in all cases all contact elements through which

electrical connections, and conductors extending from them. On simple diagrams, all the conductors that connect devices, devices and other elements are fully shown, and reading such diagrams does not cause difficulties.

For the selected pump motor control circuit diagram (example of lecture 16, Fig. 52) possible variant sketch wiring diagram of the console

local level control (SCHMU1) is shown in Fig.58. The location of the equipment on the diagram roughly corresponds to the actual placement in the cabinet structure. Next to each device is a serial number and reference designation. So, near the terminal block - 1 / XT1, the introductory circuit breaker - 2 / QF, etc. Inside each

element, the numbering of the conclusions is affixed, corresponding to the factory marking. The installation of power circuits is shown by direct connection of conductors between devices. Connections of control circuits are made by the address method. So, the electrical circuit 104 (an example of lecture 16, Fig. 33) is made as follows. Conclusions 2 and 4 of the switch 1SA1 (device 9) are bridged with each other, and wire 11-1 comes out from pin 2 (device 11, pin 1). The other end of this wire on the 1HL1 light bulb (apparatus 11) is marked 9-2 (apparatus 9, output 2). In addition, a wire 1-12 (to the terminal block XT1) departs from output 1 of apparatus 11, which is marked 11-1 at the second end. The wire connecting the terminal block 12 XT1 with the contact of the thermal relay KK1 is marked 5-95 and 1-12, respectively, from the side of the terminal block and the relay. The diagram field indicates which wires to mount with which wire, and for the protective neutral wire, its color. In the field of the drawing, installation methods can also be indicated. For example: “Installation should be performed using perforated boxes 25x25 mm with their installation in place”; “Install terminal blocks on DIN rails”, “Wires connecting the terminal block XT1 with equipment on the cabinet door should be made in the form of a bundle in a spiral tube with a diameter of 10 mm”, etc. If according to specifications on the equipment, laying wires in bundles is unacceptable (for example, compensating wires), or it is necessary to use a shielded wire, then such wiring is shown in the diagram by a dotted line. In this case, the ends of the screens must be connected to the zero protective conductor PE.

The correct interaction of all automation elements and the normal operation of the entire system is possible only when they are connected in accordance with the external wiring connection diagrams.

The layout diagram determines the relative location of the components of the AU, and, if necessary, harnesses, wires, cables, pipelines, etc. Layout schemes are used in the development of other design documents, as well as in the operation and repair of nuclear power plants.

On fig. 59 shows the layout and wiring diagram for connecting electric drives. The local control panel 5 is powered by a wired line 1, laid in the pipe of the inlet shield 8. Wired lines 2 and 3, laid in closed boxes, connect the SMU1 with the motors 6 and 7. The wired line 4 provides automatic remote control of the motors through the SMU1 from the automation panel 9, located in the operating room.

Bibliography

1. A. S. Klyuev, B. V. Glazov, A. Kh. Dubrovsky, and A. A. Klyuev; ed. A.S.
Klyuev. Design of technological automation systems
processes: a reference guide. 2nd ed., revised. and additional – M.:
Energoatomizdat, 1990. - 464 p.

2. Olsson G., Piani D. Digital automation and control systems. -
St. Petersburg: Nevsky Dialect, 2001. - 557 p.

3. A.S. Klyuev, B.V. Glazov, A.Kh. Dubrovsky, A.A. Klyuev; Ed. A.S. Klyueva, Design of process automation systems: A reference guide - 2nd ed., Revised. and additional M.: Energoatomizdat, 1990.- 464 p.

4. GOST 34.602-89. Information technology. A set of standards for automated systems. Technical task to create an automated system. / A set of standards and guidelines for automated systems. Information technology. - M.. 1991.-S. 3-15.

5. Andreev E.B. Popadko V.E. Software for process control systems in the oil and gas industry Uch allowance M: Oil and gas 2005, - 268 p.

6. Andreev E.B. Popadko V.E. Technical means of process control systems in the oil and gas industry Uch allowance M: Oil and gas 2005, - 270 p.

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9. Matveikin V.G., Frolov S.V., Shekhtman M.B. The use of SCADA-systems in the automation of technological processes. M: Mashinostroenie, 2000. 176s.

10. Nesterov A.L. Design of process control systems. Toolkit. Book 1. M: Dean. 2006.-552s

11. Aliyev I.I. Cable Products: A Handbook. - 3rd ed., Rev. - 2008. - 230 p.

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13.RM4-4-85 Automation systems for technological processes. Design of power supply systems (allowance for VSN 205-84), MMSS USSR, Design Institute "Proektmontazhavtomatika", 1986

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16.V.F. Komissarchik, Automatic control of technological processes Tutorial, Tver 2001, 247 p.

16.G.V. Ivanova "Automation of technological processes of the main chemical industries" Methodical materials in the course of lectures. Part 1. SPbGTI (TU).-SPb., 2003.- 70s.

The External Wiring Connection Diagram is a combined diagram that shows the electrical and piping connections between devices and automation equipment installed on process equipment, outside the boards and on the boards, as well as wiring connections to the devices and boards.

Connection diagrams of external wiring are performed on the basis of the following materials:

- schemes of automation of technological processes;

– basic electrical and pneumatic circuits of automation;

– operational documentation for devices and automation equipment used in the project;

- drawings of the location of technological, plumbing, energy and other equipment and pipelines with selective and receiving devices, as well as construction drawings with all the embedded and welded structures necessary for laying external wiring, tunnels, channels, openings, etc.

Connection diagrams of external wiring in the general case should contain: primary devices; shields; consoles; racks; off-panel devices; group installations of devices; external electrical and pipe wiring; protective grounding of automation systems; technical requirements; list of elements.

Primary devices and actuators are depicted at the top under the table with explanatory inscriptions (or in a mirror image at the bottom above the table of explanatory inscriptions). Shields, consoles, racks, IPC are depicted as rectangles in the middle part of the drawing (when the table with explanatory inscriptions is located above and below the drawing field) or in the lower part of the drawing field (when the table is located only on top). Inside the rectangle, the name of the shield, console, cabinet, MPC is indicated. The dimensions of the rectangles are arbitrary, sufficient to accommodate information on them.

The choice of drives and cables, the method of making electrical wiring, the choice of pipes is carried out in accordance with the instructions "Designing electrical and pipe wiring for automation systems." Electrical junction boxes are depicted in the form of a rectangle, inside which clamp assemblies are placed with the necessary numbering and show the connection of cable (wire) conductors with the appropriate marking to them. Near the graphic designations of the junction and broaching boxes, their designations and serial number are indicated. In addition, for each wiring, its technical characteristics are given: for wires - brand, section, color (if necessary), as well as length; for cables - the brand, number and cross-section of cores and, if necessary, the number of occupied cores, which is indicated in the rectangle to the right of the cable data designation; for a metal hose - type and length; for a pipe - diameter, wall thickness and length.

The diagram is supplemented with a list of elements of the external wiring connection diagram (Table 6). The list should include in the following sequence: cable products, wires, pipelines, junction and pull boxes, stop valves. For all elements, a reference designation must be given in accordance with the diagram; name and a brief description of, quantity, or footage (if we are talking about cable products, wires, etc.). Figure 17 shows an example of a connection diagram for external wiring using MEPC 6300 electric actuators operating in conjunction with PBR-2M starters. Figure 18 shows an example of a connection diagram for external wiring using a pneumatically actuated regulating body, working as a set with an EPP-300 electro-pneumatic positioner.

Table 6

List of elements of the external wiring connection diagram

11.1 Wiring diagram

The wiring diagram is designed to perform intra-panel switching. The scheme is developed on the basis of FSA, PES and drawing general view shield.

The scheme is performed on one shield without scale. It must comply with the PES in the following parameters:

2) keep the positional designations of products or devices, as well as the marking of the circuits adopted at the PES.

In addition, the diagram shows terminal blocks for connecting external

shield wiring.

The scheme is developed in a graphical or address way. With a graphical method, the connections between the contacts of the products are shown in full, taking into account the places where the harnesses are laid inside the shield. With the address method, communications are cut off at the contacts of the products and their addressing is indicated.

Devices and equipment (products) are depicted in the diagram in a simplified way, in the form of rectangles. Above or next to each rectangle is placed a circle separated by a horizontal line. In the upper part of the circle indicate the serial number of the product in the diagram, in the lower part - the reference designation according to the PES. The contacts of the connecting elements of the products are conventionally depicted in the form of circles in accordance with their actual location. The diameter of the circle (for example, 5 mm) should be kept constant throughout the diagram. Inside the circles enter the factory marking of the contacts. In its absence, the contacts are conditionally marked with Arabic numerals, stipulating this in the margins of the diagram. Electronic equipment components are usually placed on boards, which are also assigned serial numbers when depicted in the diagram.

The drawing shows the outlines of the inner walls of the shield deployed in the same plane with a simplified image of the TCA and electrical equipment, as well as the places for laying wiring (similar to the view on the inner plane of the shield). The actual location of the products relative to each other and the proportions of the products.

An example of a wiring diagram made by the address method is shown in Figure 11.1.

Figure 11.1 - Wiring diagram of the ACP shield, made by the address method

Figure 11.1, sheet 2

11.2 Connection tables

Connection tables are used to lay communication lines inside the shield. Posting entries in the connection table are made on the basis of PES and external wiring diagrams.

When filling in the connection tables, the conductors are recorded within the entire shield (section), taking into account the location of devices, equipment, clamps in the shield on the view from the inside according to one of the following rules:

in ascending order of the marking numbers of the circuits on the PES;

according to the method of continuity of the circuit, in which, as a rule, the beginning of each subsequent conductor must be on the device where the previous conductor ended, or on the device located nearby.

The order of filling in the columns of the connection table:

in the column "Conductor" indicate the marking of the conductor for PES;

in the columns “Where it comes from” and “Where it comes from”, the addresses of connection of conductors are given;

in the column “Wire data” for wires indicate their brand, section and, if necessary, color;

in the “Note” column indicate the name of the wiring that requires a separate gasket and jumper symbols.

An example of filling in the “Connection Table” is shown in Table 11.1.

11.3 Connection tables

Connection tables are used to connect panel wiring to the contacts of devices and equipment.

Wiring connection tables should be performed in the order of arrangement of devices and equipment on the view from the inside of the switchboard, from left to right, from top to bottom, sequentially along the walls (left, front, right) and rotary

structures. The recording begins with the appropriate headings (for example, “Left Wall”, etc.).

In the column "Type of contact" indicate the position of the device and the designation of the block or connector.

In the columns “Output” indicate the number of occupied outputs.

In the columns "Conductor" against the corresponding pin numbers indicate the marking of the wires connected to this pin.

An example of filling in the table is shown in table 11.2

Table 11.1 - Table of connections

Continuation of table 11.1

Table 11.2 - Connection table

Topic 5.DESIGN external wiring diagrams

Lecture 12

12.1 General

The external wiring connection diagram is a combined diagram that shows the electrical and piping connections between the IMS installed on the process equipment and in situ with the TCA installed on the switchboards, as well as the wiring connections to the instruments and switchboards.

The external wiring connection diagram is performed if the TCA connection image clutters up the wiring diagram.

The schemes are performed on the basis of FSA, PES, operational documentation for TSA used in the project; wiring diagrams or tables of connections and connection of panels and consoles; drawings of the location of process equipment and pipelines, indicating the places for sampling impulses; construction drawings with all the embedded and welded structures, tunnels, channels, openings necessary for laying external wiring.

Schemes are performed without observing the scale on one or more sheets of A1 format in accordance with GOST 2.301-68. The actual location of the devices on the diagram is not taken into account.

The thickness of lines depicting devices and circuit elements, including cables, wires, pipes, should be from 0.4 to 1 mm.

The diagram must have a minimum number of kinks and intersections of lines, the minimum distance between lines must be at least 3 mm, the marking of the conductors of cables and wires is indicated in accordance with the PES.

12.2 Ccontent and layout of charts

The scheme generally contains:

1) primary devices with an explanatory table;

2) boards, consoles, cabinets;

3) off-panel devices and group installations of devices;

4) external electrical and pipe wiring;

5) protective zeroing of TCA;

6) technical requirements (instructions);

7) list of elements.

An example of the implementation of the scheme is shown in Figure 12.1.

12.3 Primary devices

In the upper part of the drawing, and with a large number of devices and in the mirror image below, a table with explanatory inscriptions is placed. The sizes of the table rows are taken depending on the amount of information placed in them. Under the table there is an image of devices placed directly on the process equipment and pipelines. Devices that do not have factory markings for the contacts of the connecting elements are depicted in the diagram using the UGO FSA. All other devices are depicted in the form of mounting symbols corresponding to the factory instructions, or conditionally, in the form of rectangles, indicating the connecting elements inside the contacts. The marking of cores, wires and cables is indicated outside the installation symbol.

12.4 Shields

They are conventionally depicted in the form of rectangles in the lower part of the diagram (when the explanatory table is located only on top) or in the middle of the diagram (when

Figure 12.1 - Scheme of external wiring

Figure 12.1, sheet 2

table top and bottom). The size of the rectangles depends on the amount of information placed inside. In the rectangles indicate the name of the shields, and below them, in brackets, the designation of the drawing of the wiring diagram or the connection table. For complex shields, all their components (sections, panels) are indicated. The wires are brought to the middle of the corresponding panels and completed with circles with a diameter of 2 mm.

Figure 12.2 - Image of complex shields on the diagram of external connections

In the rectangle of a single shield, images of the terminal blocks and the connection of the corresponding wiring to them are shown.

If there are devices on the panel, the wiring to which does not allow breaks on the terminal blocks (compensation wires), the corresponding secondary device is conventionally shown in the rectangle of the shield with its reference designation according to the FSA, with the image and designation of the connecting element and its contacts for connecting the specified wiring.

12.5 Off-panel devices and group installations of devices

Off-panel devices and their group installations are located on the drawing field between the primary devices and shields. They are depicted similarly to primary devices.

4.5.1General requirements

4.5.1.1 Connections and connections of external wiring are shown in the form of diagrams or tables.

4.5.1.2 Schemes of connection and connection are performed, as a rule, separately for each automated unit, the installation of which is carried out independently of the others. At the same time, the name of the block is additionally indicated in the name of the scheme.

Example - Block of pumps. Scheme of connecting external wiring.

4.5.1.3 It is recommended to show wiring connections to devices installed directly on process equipment and communications, as well as to single off-panel (local) devices on the external wiring diagrams.

With a small amount of electrical wiring connected to automation equipment, these connections can be made on the connection diagram without following the connection diagram.

4.5.1.4 Wiring connections to group installations of devices, panels and consoles, complexes of technical means are recommended to be provided on independent connection diagrams.

4.5.1.5 The technical means for which electrical wiring connections are shown in the diagrams are depicted in a simplified way with external outlines or in the form of rectangles in which:

Introductory elements (for example, pressure seals, glands) - along the contour of the rectangle are shown with conventional graphic symbols in accordance with GOST 2.702;

Input and output elements are shown as circles (for round plug connectors) or rectangles (for example, for assemblies and terminal blocks and other elements of the corresponding form).

4.5.1.6 Designations (of off-panel devices), serial number and type (of junction boxes) are indicated above the shelf of the leader line, below the shelf - designation and / or number of the installation sheet (Figure 7)

Figure 7

For other technical means, their name is indicated inside the rectangle, as well as:

Sheet number (document designation) of the installation drawing (for group installation);

Designation of a sketch drawing of a general view (for panels and consoles).

4.5.1.7 Designations of cores of cables and wires on the diagrams and tables of connections and connections are accepted in accordance with the circuit diagrams.

4.5.2 Rules for the execution of external wiring diagrams.

4.5.2.1 In the connection diagram, in the general case, the following is given:

Primary devices and actuators installed directly on the process equipment and communications;

Off-panel devices and group installations of devices;

Shields, consoles, complexes of technical means;

External electrical and pipe wiring between all technical means of automation;

Protective grounding and zeroing of automation systems;

List of elements according to GOST 2.701.

4.5.2.2 Primary devices and actuators are depicted in the upper part of the diagram under the data table performed according to Figure 8. Off-panel devices, shields and other technical means are located below.

Figure 8

4.5.2.3 Technical means of automation, for which wiring connections are not shown in the diagram, depict:

Devices - conditional graphic designations in accordance with GOST 21.404;

Group installations, junction boxes, panels and consoles, complexes of technical means - in the form of rectangles, in which their name, designation and / or number of the sheet containing the connection diagrams are indicated;

Single boards and consoles - in accordance with Figure 9

Broaching boxes - in the form of rectangles, inside which the dashed lines show the branching of the wire harnesses - in accordance with Figure 10;

Composite boards and consoles - in accordance with Figure 11.

Figure 9

Figure 10

Figure 11

4.5.2.4 External electrical and pipe wiring is carried out with separate solid main thick lines. In this case, the wiring laid in the boxes is depicted by two parallel thin lines at a distance of 3-4 mm from each other.

For each wiring, above the line depicting it, give a technical characteristic (type, brand of cable, wire, pipe, etc.) and the length of the wiring. It is allowed to indicate the length under the wiring line. For electrical wiring in protective pipes, the characteristics and length of the protective pipe are indicated under the line.

The control cables and protective pipes in which the wiring harnesses are laid are assigned serial numbers. Serial numbers are assigned to the boxes with the addition of the letter K.

Example - 1K, 2K, etc.

Pipe wiring (impulse, command, supply, drainage, auxiliary, etc.), including pneumatic cables, are assigned serial numbers with the addition of the number 0 in front of them.

Posting numbers are indicated in circles placed at line breaks.

4.5.2.5 High-pressure impulse piping (over 10 MPa) is depicted on the connection diagrams in frontal dimetric projection, indicating all elements of the wiring.

4.5.2.6 Protective grounding to grounding of automation systems is shown on the connection diagrams using graphic symbols in accordance with Table E.I (Appendix E).

The cores of cables and wires used as bullet protective conductors are assigned a ball designation with the addition of the letter "N".

An example is 801N.

4.5.2.7 The technical requirements for the circuit in the general case should contain:

Explanations on the numbering of cables, wires, pipes, boxes (if necessary);

Instructions for protective grounding and zeroing of electrical installations.

4.5.2.8 The list of elements performed in accordance with GOST 2.701 includes:

Shutoff valves;

Junction and pull boxes;

Cables, wires, pneumatic cables;

Materials for protective grounding and grounding of equipment and wiring.

Count "Pos. designation" is not filled.

4.5.2.9 For complex wiring connections in an automation system (for example, with the predominance of electric drive control systems), when multicore trunk cables are used, it is advisable to show the wiring connection according to a simplified diagram that reflects only the wiring structure. In this case, all devices are shown with symbols in accordance with the automation scheme (without a data table), the rest of the technical means are in the form of rectangles.

Communication lines (regardless of the number of wires, cables, ducts being laid) are shown in one line, without specifying the characteristics and length of the wiring, the numbers of the wiring are indicated above the communication line.

For such a scheme, a table for connecting external wiring is performed, in which all other information necessary for wiring is given.

An example of the implementation of the external wiring connection diagram is shown in Figure 12.

Figure 12

4.5.3 Rules for the implementation of external wiring diagrams

4.5.3.1 In the connection diagram, in the general case, they show wiring connections to group installations of off-panel devices, junction boxes, shields (including terminal ones), consoles, complexes, and their components. For complex connections to single off-panel devices, electrical devices, and other technical means (for example, for certain types of gas analyzers and concentrators, starters, push-button control stations), they are also shown on the connection diagram.

4.5.3.2 On the connection diagram, the following is given and applied:

Images of devices to which wiring is connected (according to clause 4.5.1.5);

Connection of cables, wires and pipes to them and their designations (according to clause 4.5.1.7);

Sections of cables, pipes in accordance with the connection diagram. Segments of cables and pipes, opposite to the connection, end with a curly bracket with reference to the designation and / or sheet number of the main set, which shows the connection diagram.

An example of an image of connecting external wiring to a single single-section shield is shown in Figure 13.

Figure 13

4.5.4 Rules for executing connection tables and connecting external wiring.

4.5.4.1 The connection table is performed in the form 4. On the first sheet of the table, a list of elements and technical requirements are given.

4.5.4.2 In the columns of the connection table indicate:

In the column "Cable, bundle, pipe" - the number of electrical or pipe wiring;

In the column "Direction" - the name or designation of the technical means of automation from which (from where) and to which (where) this connecting wiring is directed;

In the column "Direction according to the location drawings" - the address of laying external wiring;

In the column "Measuring circuit" put "plus" - only for measuring circuits;

In the column "Installation drawing" - the designation of the installation drawing of automation devices indicated in the subheading "From" of the column "Direction".

Form 4 ending

The remaining columns are filled in in accordance with their names. At the same time, the column “Cable, wire” does not indicate the actual length, and the column “Pipe” additionally indicates the thickness of the walls of the pipes, including protective ones, for a pneumatic cable, its brand and number of pipes.

4.5.4.3 The connection table is performed according to form 5 according to the sections corresponding to the names of technical means (for example, boards, panels, junction boxes). Their names are recorded in the table as a heading and underlined.

First, electrical wiring is recorded in the table, then (from a new sheet) pipe wiring.

It is recommended to leave free rows in the table between records of different devices.

4.5.4.4 In the columns of the connection table indicate:

In the column "Cable, harness" - the number of the cable, wiring harness, wire, pneumatic cable connected to the device indicated in the header;

In the column "Conductor" - the designations of the conductors of cables, wires, pneumatic cables. If two conductors are connected to the same terminal (terminal), an “asterisk” is placed next to the conductor designation;

In the column "Output" - the designation of the output and the number of the clamp (assemblies of bulkhead connectors and the number of the connector), i.e. the place of connection of the cable cores (pipes) in this device.

Contents of schemes. Schemes in the general case should contain: primary devices; shields; consoles; racks; off-panel devices; group installations of devices; external electrical and pipe wiring; protective grounding of automation systems; technical requirements (instructions); list of elements.
In necessary cases, connection diagrams may additionally contain a table of non-standardized symbols and a table of applicability.

CONNECTION DIAGRAM FOR EXTERNAL WIRING

4.1.1 . Connection diagrams must contain images of technical means with input devices and wire connections connected to these wiring devices.

4.1.2 . Depending on the type of technical means, the connection diagrams show:

group settings;

electrical and pneumatic junction boxes;

complexes.

4.1.3 . Devices are depicted according to the rules given in clause 3, group installations are similar to shields.

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B). The procedure for drawing up a plan for the location of automation and postings.

Connection diagrams in the general case should contain:

1) primary devices;

2) off-panel devices, group installations of devices;

3) shields (distribution block, DIN-rail in the cabinet), complexes;

4) external electrical and pipe wiring;

5) protective grounding and zeroing of automation systems;

6) technical requirements (instructions);

7) list of elements.

External electrical wiring is performed in separate solid thick lines. In this case, the wiring laid in the boxes is depicted by two parallel thin lines at a distance of 3-4 mm from each other. For each wiring, a technical characteristic (type, brand of cable, wires, pipes, etc.) and the length of the wiring are indicated above the line depicting it. Cables and wire harnesses are assigned serial numbers. The serial numbers of the cables in the boxes are assigned with the addition of the letter "K".

Connection diagrams and connection of external wiring are performed on the basis of the following materials:

Schemes of automation of technological processes;

Principal electrical, pneumatic, hydraulic circuits;

Technical descriptions and operating instructions for devices and automation equipment used in the project;

Tables of connections and wiring of panels and consoles, performed in accordance with the instructions for PM4-107;

Drawings of the location of technological, plumbing, energy, etc. equipment and communications with selective and receiving devices, as well as construction drawings with all the embedded and welded structures necessary for laying external wiring, overpasses, tunnels, channels, openings, etc.