CONTENTS 9 MARKING AND SEALING 11 …...5.3 The intrinsic barrier is compliant with GOST 31610.0-2002 and GOST 31610.11 and is based on duplicated Zener diodes with serially-connected

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Version: 31.07.2020_А6

CONTENTS

1 INTENDED USE ......................................................... 2

2 TECHNICAL SPECIFICATIONS ................................ 3

3 DESIGNATION FOR ORDERING .............................. 4

4 PACKAGING INCLUDES .......................................... 5

5 DESIGN AND OPERATING PRINCIPLE ................... 5

6 SAFETY MEASURES ................................................ 7

7 INSTALLATION ......................................................... 7

8 GETTING STARTED .................................................. 9

9 MARKING AND SEALING ....................................... 10

10 PACKAGING ............................................................ 10

11 TRANSPORT AND STORAGE ................................ 11

12 DISPOSAL ............................................................... 11

13 VERIFICATION PROCEDURE ................................. 11

14 ACCEPTANCE CERTIFICATE ................................ 15

15 CERTIFICATE OF PACKAGING ............................. 15

16 MANUFACTURER'S WARRANTY .......................... 16

17 COMPLAINT HANDLING ........................................ 16

18 VERIFICATION RESULTS ....................................... 17

APPENDIX A Dimensions of the Unit .............................. 18

APPENDIX B Unit Wiring Diagrams ................................. 22

APPENDIX C Unit Verification Diagram ........................... 25

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Data Sheet and User Manual contain the specifications, the rules of operation, and an operating-principle description for БПДМ-Ex power supplies ("the Unit"), as well as information on its acceptance, packaging, and the Manufacturer's warranty.

1 INTENDED USE

1.1 The Unit is designed for connecting passive sensors with an output current of 4...20 mA located in hazardous areas, as well as for converting 4...20 mA signals into 0...5, 0...20 mA output signals; they can also be operated in a non-conversion mode. The Unit transmits the current signal from a hazardous area into a safe area. The Unit supplies power to centers and the output-signal (load) circuit.

1.2 The Unit can contain up to two independent channels that are galvanically connected through intrinsically-safe circuits. Output sig-nal type is customized by the Manufacturer. Depending on the type, the Unit may contain Class “ia” or Class “ib” intrinsically-safe circuits compliant with the GOST 31610.0 and GOST 31610.11 requirements for subgroups IIB and IIC.

1.3 The Unit is designed for placement outside hazardous areas. The Unit comes in versions for mounting on NS35/7.5 DIN rails, or wall / enclosure mounting.

1.4 In accordance with GOST 14254, the Unit has one of the fol-lowing degrees of protection:

⎯ IP20 for DIN-rail or wall mounting;

⎯ IP30 for enclosure mounting. 1.5 The Unit generates no industrial noise. 1.6 In terms of weather resistance, the Unit is a Category 3.1 NF

unit per GOST 15150, a Group C3 unit per GOST 52931; however, its operating temperature range is limited to -50...+50 °С.

1.7 It is permissible to expose the Unit to:

⎯ sinusoidal vibrations with a frequency of 5 to 25 Hz and an amplitude of up to 0.1 mm (Group L3 per GOST 52931);

⎯ DC and AC magnetic fields with a frequency of (50 ± 1) Hz and a strength of up to 400 A/m;

⎯ relative humidity of 30 to 80 % as long as the temperature is within the operating range.

1.8 The Manufacturer reserves the right to amend the technical documentation for this Product without prior notice as long as the functionality and purpose are not altered.

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2 TECHNICAL SPECIFICATIONS

2.1 The boundary parameters of external intrinsically-safe circuits of the Unit shall not exceed the values shown in Table 1.

Table 1. Boundary Parameters Explosion-proof electrical equipment group

IIB IIC

Um, V

C0, µF

L0, mH

U0, V

I0, mA

P0, W

Um, V

C0, µF

L0, mH

U0, V

I0, mA

P0, W

250 0.41 6.0 25.2 100 0.6 250 0.05 1.5 25.2 100 0.6

Notes:

— Um is the maximum voltage that can be applied to the connecting units of the non-IS circuits of Unit-connected electrical equipment without compromising the intrinsic safety;

— С0 is the maximum capacitance of Unit-connected IS circuits; — L0 is the maximum inductance of Unit-connected IS circuits; — U0 is the maximum output voltage of IS circuits; — I0 is the maximum output current of IS circuits; — Р0 is the maximum output power.

2.2 Main specifications are given in Table 2.

Table 2. Main Specifications Parameter Value

AC mains voltage range, V 187…242

AC voltage frequency, Hz 49…51

Power consumption, V·A max. 6.0

Number of channels (optional) 1 or 2

Possible options for unified current signals at IS-circuit inputs, mA

4…20

Possible options for unified output current signals, mA (optional) 0…5, 0…20,

4…20

Output signal as a function of the IS-circuit input signal Linear

dependency

Design load of IS circuits, Ohm (taking into account the commu-nication-line resistance)

max. 650

Design load of output circuits, Ohm, for 0...20, 4...20 signals, tak-ing into account the communication-line resistance

max. 750

Design load of output circuits, Ohm, for 0...5 signals, taking into account the communication-line resistance

max. 2,5

IS-circuit voltage when idling, V max. 25.2

IS-circuit voltage at 20 mA load current, V min. 17.2

Basic fiducial error limit expressed as a percentage of the out-put-signal range, %

max. ± 0.1

Maximum permissible alteration in the output signal due to the ambient temperature rising from -10 to +50 °С for each 10 °С, %, at maximum load current

± 0.1

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Table 2, part 2 Parameter Value

Maximum permissible alteration of the output signal due to an al-tered supply voltage, % of the output-signal range

± 0.1

Maximum permissible ripple voltage at the IS input, % Umsr 0.2

Maximum permissible output-signal ripple, % of the output-signal range

0.2

Unit weight, kg for enclosure mounting for DIN-rail or wall mounting

max. 0.6 max. 0.5

3 DESIGNATION FOR ORDERING

Sample designation for ordering:

БПДМ-Ех - ia - IIC - 005 - 1 - 01К - 360 - ГП 1 2 3 4 5 6 7 8

where 1 is the name; 2 is the type of explosion protection:

⎯ “ia” for extremely explosion-proof;

⎯ “ib” for explosion-proof; 3 is the electrical-equipment subgroup per Table 1:

⎯ IIC;

⎯ IIВ; 4 is the output-voltage range:

⎯ 005 for 0…5 mA;

⎯ 020 for 0…20 mA;

⎯ 420 for 4…20 mA; 5 is the number of channels:

⎯ 1 is for a single channel;

⎯ 2 is for a dual channel; 6 is the version:

⎯ 01К for enclosure mounting (terminal-block connections);

⎯ 01Р for enclosure mounting (2PM connectors);

⎯ DIN for DIN-rail or wall mounting; 7 is for extra runtime (up to 360 hours); 8 signifies whether the Unit has been state-verified.

Note NS35/7.5 DIN rails available on request.

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4 PACKAGING INCLUDES

Package contents must match the list in Table 3.

Table 3. Package Contents

Name Designation Num-ber

Note

БПДМ-Ех Sensor Power Supply

ЭИ.70.00.000 ЭИ.80.00.000 ЭИ.89.00.000

1 as ordered

Data Sheet User Manual

ЭИ.70.00.000ПС 1

XS1 socket 2РМ14КПН4Г1В1 1 for the 01K and 01P ver-sions

XS4 and XS5 plugs 2РМ14КПН4Ш1В1 2 for the 01P version

XS2 and XS3 sockets 2РМ14КПН4Г1В 2

DIN rail NS 35\7.5 m as ordered

5 DESIGN AND OPERATING PRINCIPLE

5.1 Functional diagram of the Unit is shown in Figure 1.

Sensors 1 and 2 are passive sensors with 4...20 mA output current signals; 1 are intrinsic barriers; 2 are current limiters; 3 are current converters; 4 is the power supply; RL1, RL2 are load resistance values; V1 and V2 are voltmeters.

Figure 1. Unit Functional Diagram

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5.2 The Unit consists of: intrinsic barriers (the Barrier) that limits the electric power supplied to the hazardous area through circuitry connected to GOST 31610.11 and GOST 30852.13 electrical equip-ment; current limiters; current converters that convert 4...20 mA sig-nals into 0...5, 0...20 mA output signals (non-conversion mode also available); and a power supply designed for converting 220 V mains voltage into stabilized DC voltage.

5.3 The intrinsic barrier is compliant with GOST 31610.0-2002 and GOST 31610.11 and is based on duplicated Zener diodes with serially-connected resistors and fuses. The intrinsic barrier cannot be disassembled.

5.4 The intrinsic barrier contains the following functional elements and nodes:

⎯ limiting resistors that determine the short-circuit current;

⎯ a group of limiting Zener diodes and diodes (for “ia” barri-ers, Zener diodes are duplicated) that determing the max-imum idling voltage in IS circuits;

⎯ a fuse serially connected to resistive circuits. 5.5 Power specifications of all barrier resistors are aligned to the

regulated power reserve adopted for intrinsic safety. Diode-resistive or resistive circuits with fuses disconnect the IS circuit in case of emer-gency voltage at non-IS inputs. In these circuits, resistors limit the current passing through the fuse. If an AC voltage of up to 250 V is accidentally supplied to the voltage barrier, no arc effect occurs in the low-voltage fuse.

5.6 Electrical load of the intrinsic barrier components does not ex-ceed 2/3 of its rated value for normal and emergency operations. The intrinsic elements are protected by a dielectric enclosure and have redundancy per GOST 31610.11 for “ia” and “ib” circuits. The dielec-tric strength of the transformer insulation between the primary winding and the secondary windings has passed 2,500 V AC tests per GOST 31610.11. Electric clearances, leakage paths, and the strength of in-sulation between electric elements and circuits are compliant with GOST 31610.11. Board conductor tracks and attachments are pro-tected from the environmental by insulating varnish. Maximum capac-itance and inductance of the external barrier circuit for IIC and IIB ex-plosive mixtures is configured with a minimum safety factor of 1.5 as per GOST 31610.11, see Table 1. Connectors and terminal blocks ensure that IS circuits remain in reliable permanent contact.

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5.7 Overall and mounting dimensions of the Unit are given in Ap-pendix A.

5.8 The front panel contains channel-status LEDs:

⎯ if on, the IS-circuit voltage is within normal range;

⎯ if off, channel failure has occurred.

6 SAFETY MEASURES

6.1 To be allowed to operate the Unit, a person must receive a safety briefing for ≤ 1,000 V units and study this Data Sheet and User Manual.

6.2 Maintenance staff requirements per GOST 31610.17. 6.3 In terms of electric-shock protection, the Unit is a Class 01

unit per GOST 12.2.007.0. 6.4 The Unit must be connected to a ground circuit.

7 INSTALLATION

7.1 In the winter, the Unit must be unboxed in a heated room only; before unboxing, the box must be kept in such a heated room for at least 8 hours.

7.2 Before mounting, the Unit must be visually inspected. Verify that conformity of markings and make sure there are no dents or other visible mechanical damage to the enclosure.

7.3 The Unit is to be mounted outside hazardous areas or outdoor facilities.

7.4 The Unit is mountable in an enclosure, on a DIN rail, or wall-mounted depending on the version. The installation location must be easily accessible for mounting, dismounting, and maintenance.

7.5 Notches in the enclosures for mounting 01K and 01P units must be arranged as shown in Appendix A.

7.6 DIN units are mounted on DIN rails by a special latch as shown in Figure 2, or wall-mounted as shown in Figure 3.

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1 release the latch; 2 mount the Unit on the DIN rail, fasten the latch.

Figure 2. DIN-Rail Mounting

1 remove the latch from the Unit; 2 fix the latch onto the wall; 3 mount the Unit on the latch.

Figure 3. Wall Mounting

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7.7 External connections of the Unit must be mounted according to the wiring diagram (Appendix B) and the pin numbering (Figures A.3 and A.5, Appendix A).

7.8 When mounting the Unit, consult this Data Sheet, User Man-ual, Consumer-Grade Electrical-Equipment Operation Code Div. 3.4 (Rus: ПЭЭП 3.4), Electrical-Equipment Operation Code (Rus: ПУЭ) and other industrial codes and standards.

7.9 The parameters of the communication line between the unit and the IS equipment shall not exceed values per Table 1. The com-munication line can be implemented as any-type shielded cable with copper wires of at least 0.35 mm2 in cross-section; the cable must be compliant with EEOC. Cables of IS circuits must not be laid on the same side of the enclosure with those of barrier load and power-sup-ply circuits. Communication-line cable resistance must not exceed 25 Ohms.

7.10 Unit and Unit-connected electrical equipment must be grounded per GOST 30852.13. Grounding is done by connection to terminal blocks in the DIN version or to the grounding bolt in the 01 version.

7.11 “ia” (extremely explosion-proof) units must be connected to a special separate sub-ohm ground bus. “ib” (explosion-proof) units can be connected to earthed neutrals with a ground-bus resistance of up to 4 Ohms.

7.12 When operating the Unit, it is acceptable to combine the mi-nus terminals of XP4 and XP5 (output circuits) terminal blocks and to connect them to the ground bus.

Attention! When using a Unit with redundant outputs, it is oblig-atory to connect resistors to XP4 and XP5 connectors (terminal blocks) to induce load. Resistance is configured per Table 2 as a func-tion of the output signal, 0.5 W minimum power.

7.13 Connect the Unit by a screwdriver for 0.6x2.8 sockets (7810-0966 per GOST 17199-88). Terminal-block screw-tightening torque must be equal to 0.5 N·m.

8 GETTING STARTED

8.1 Before powering on the Unit, make sure it is installed and mounted as specified in sections 6, 7 hereof. Study this Data Sheet and User Manual.

8.2 Supply mains voltage. The Unit is ready for use.

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8.3 When using the Unit, comply with the local industry-specific instructions and other regulatory documents on explosion-proof elec-trical equipment.

9 MARKING AND SEALING

9.1 The Unit is marked in accordance with GOST 31610.0 and GOST 31610.11; the marking contains the following:

⎯ Unit name;

⎯ connector designations;

⎯ where external circuits are connected, it says, "Intrinsically safe circuits";

⎯ name of the Manufacturer

⎯ Explosion-protection marking [Ex ia Ga] IIC/IIВ or [Ex ib Gb] IIC/IIВ;

⎯ unified output current-signal range;

⎯ supply voltage;

⎯ mains frequency;

⎯ IS-circuit parameter values: Um, U0, I0, C0, L0, Р0;

⎯ operating temperature range;

⎯ instrument-type approval sign;

⎯ Ex certification sign;

⎯ ordinal number of the Unit (per the Manufacturer's num-bering system) and date of manufacture.

9.2 01K or 01P units are sealed on the front panel atop the upper-right screw; DIN units are sealed at the junction of the front panel with the enclosure by sticking a warranty sticker with the Manufacturer's logo.

10 PACKAGING

10.1 Unit packaging ensures its safety during transport. 10.2 The Unit and its operational documents are contained in a

plastic bag. The bag is placed in a corrugated-cardboard box. Free space in the box is filled with corrugated cardboard or bubble wrap.

10.3 Corrugated-cardboard boxes with units are placed in Type IV boxes per GOST 5959 or GOST 9142. Free space in between boxes is filled with corrugated cardboard or bubble wrap.

10.4 When transporting to the Far North or to some difficult-to-reach areas, the units must be packed in corrugated-cardboard boxes

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then in Type III-1 boxes per GOST 2991 or Type IV per GOST 5959 if shipped in containers.

10.5 Box insides are lined with a water-proof material to protect from dust and water.

10.6 Gross weight must not exceed 35 kg. 10.7 Pursuant to GOST 14192, the transport container must bear

indelibly-painted additional information labels and handling signs with the following meanings: Fragile, Caution, Top, Protect from Moisture

10.8 Units must be packaged in closed well-aired rooms with an outside temperature of 15 to 40 ºС at a relative humidity of up to 80 %.

11 TRANSPORT AND STORAGE

11.1 Unless unboxed, the Unit is transportable by any mode of transport, including air carriage in heated pressurized compartments; transport is subject to all the effective transport-specific regulations.

11.2 Transport conditions must be compliant with Condition Group 5, GOST 15150.

11.3 Unit storage for transport must be compliant with Condition Group 5, GOST 15150.

12 DISPOSAL

12.1 The Unit is non-hazardous for human life and health or for the environment during and after its service life.

12.2 The Unit contains no precious metals. 12.3 The Unit must be disposed of by the user organization in due

compliance with all the regulations effective in the area.

13 VERIFICATION PROCEDURE

13.1 The Unit is verified by the State Metrology Service or other authorized bodies empowered to verify. Requirements to the organi-zation, verification procedure, and presentation of verification results are set forth in the Procedure for Verification of Measuring Instru-ments, Requirements to Verification Signs and Certificates ("the Pro-cedure") as approved by the Order of the Ministry of Industry and Trade of the Russian Federation dd. July 2, 2015 No. 1815.

13.2 Verification must be carried out every three years. 13.3 Verification includes:

⎯ visual inspection of units;

⎯ calculating the basic fiducial error.

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13.4 Visual inspection must verify:

⎯ the presence of markings;

⎯ the absence of external damage;

⎯ the condition of terminal blocks and connectors;

⎯ the integrity of channel-status LEDs;

⎯ the absence of breakages in, or damage to, grounding wires and connection lines.

Units with mechanical damage to the enclosure and connections, and/or with contaminated contacts are to be rejected.

13.5 Verification is carried out under the following conditions:

⎯ ambient-air temperature of (23 ± 2) ºС;

⎯ atmospheric pressure of 86 to 106 kPa;

⎯ relative humidity of 30 to 80 %;

⎯ supply voltage of 210...230 V;

⎯ no external electric or magnetic fields; otherwise, such fields must not affect the Unit's performance;

⎯ the Unit must be powered for at least 15 minutes before testing.

13.6 Verification instruments and tools:

⎯ R331 100 Ohm reference resistance coil, 0.01 % accu-racy class;

⎯ РС5000 multimeter, 0.015 % accuracy class;

⎯ ЭнИ-201И calibrated-signal source, 0.015 % accuracy class.

Other equipment is allowed for use if it is properly certified and has similar or better performance.

13.7 Measuring instruments are verified by a natural person cer-tified as a Verification Officer under the Procedure.

13.8 To be allowed to verify the Unit, a person must receive a safety briefing in the prescribed manner and must have studied the following documentation:

⎯ this Data Sheet and User Manual;

⎯ operating documentation for verification instruments and tools.

13.9 When verifying the Unit, caution must be exercised in ac-cordance with Section 6 hereof.

13.10 To calculate the basic fiducial error, the Unit is connected according to the diagram shown in Appendix B.

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13.11 Input signal configuration: signal from ЭнИ-201И is sup-plied to the inputs of IS circuits (XP2 and XP3 terminal blocks) per table 4.

13.12 Output signals are measured indirectly by measuring the voltage at the reference resistance coil connected to the output cir-cuits of the Unit (XP4 and XP5 terminal blocks).

Output-signal value is calculated as follows (1):

Iout = Uout / Rref, (1)

where Uout is the alteration of the output signal at the reference re-sistance coil, V; Iout is the output current, mA; Rref is the resistance of the reference coil, 100 Ohms.

13.13 Basic fiducial error γ is calculated as follows:

γ = (Iout.m – Iout.d) / (Iu – Il) ∙ 100%, (2)

where Iout.m is the measured output-signal value per (1), mA; Iout.d is the design output-signal value for the verified point per Table 4, mA; Il, Iu are the lower and the upper limits of the output signal (ver-sion-dependent), mA.

Table 4. Input-Output Currents

Range of in-put signal

Iin = 4…20 mA

Output-signal range

Iout = 0…5 mA Iout = 0…20 mA Iout = 4…20 mA

Design value of the output signal at Rl = 100 Ohm

Iin, mA Iout, mA Uout, V Iout, mA Uout, V Iout, mA Uout, V

4.000 8.000

12.000 20.000

0.000 1.250 2.500 5.000

0.0000 0.1250 0.2500 0.5000

0.000 5.000

10.000 20.000

0.0000 0.5000 1.0000 2.0000

4.000 8.000

12.000 20.000

0.4000 0.8000 1.2000 2.0000

Note: Maximum basic fiducial error obtained must not exceed the Unit's basic fiducial-error limit per Table 2.

13.14 Verification results are recorded in the Verification Certifi-cate (Appendix 1 to the Procedure), whereby the results themselves are specified on the reverse side (or in an arbitrary protocol); other-wise, they may be presented in this Data Sheet and User Manual, whereby they are to be witnessed by the Verification Officer's seal.

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13.15 If the Unit does not pass verification, it is rejected; the form presented in Appendix 2 to the Procedure is therefore used to notify that the Unit is not ready for service.

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14 ACCEPTANCE CERTIFICATE

БПДМ-Ех Power supply for sensors ______________________

______________________________________________________

serial number ______________________ is compliant with specifica-

tions per TU 4218-003-51465965-2003 and is therefore found ready

for service.

Date of issue ___________________________.

L.S.

QA Team representative ______________ / _____________ /. (signature, surname)

Primary verification (calibration) results


serial number _____________________ positive.

Verification (calibration) date ___________________________.

L.S.

Verification Officer ____________________ / _____________ /. (signature, surname)

The Unit has run for an additional _________ hours.

15 CERTIFICATE OF PACKAGING


serial number ________________________ is packed in full compli-

ance with the effective design documentation.

Date of packing ____________________.

Packed by _________________ / ______________ /. (signature, surname)

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16 MANUFACTURER'S WARRANTY

16.1 The Manufacturer guarantees the Unit's proper operation for 36 months since the day of commissioning provided that the actual transportation, storage, and operating conditions are in line with the conditions herein specified.

16.2 Warranty storage period is 6 months since the date of man-ufacture. Excess storage is deduced from the warranty period.

16.3 Date of commissioning ____________________________. 16.4 Position, surname, and signature of the officer witnessing

the verification of the Unit's condition and its commissioning: ______________________________________________________

17 COMPLAINT HANDLING

17.1 Complaints about units that have been found non-compliant with the TU specifications during its warranty period or warranty stor-age period shall be submitted to the Manufacturer.

17.2 Defect remedy shall be the Manufacturer's responsibility. 17.3 Complaints about units, the defects whereof have been

caused by improper transportation, operation, or storage, shall be re-jected.

Manufacturer: Energiya-Istochnik LLC Russia, 454138 Chelyabinsk, 290 Prospekt Pobedy, Office 112, phone/fax: +7 (351) 749-93-60, +7 (351) 742-44-47, 749-93-55, http://eni-bbmv.ru, E-Mail: [email protected]

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18 VERIFICATION RESULTS

Date

of verification Verification results Signature

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APPENDIX A

Dimensions of the Unit

1 is DG128-5.0-02P terminal blocks for intrinsically-safe circuits; 2 is the channel-status LEDs; 3 is DG128-5.0-03P terminal block for supplying mains voltage; 4 is DG128-5.0-02P terminal block for grounding; 5 is DG128-5.0-02P terminal blocks for output circuits; 6 is the warranty label; 7 is a DIN rail.

Figure A.1. Dimensions of the Unit (DIN Version)

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Appendix A continued

1 are the channel-status LEDs; 2 is the warranty label; 3 are DG128-5.0-02P terminal blocks for intrinsically-safe circuits; 4 is DG128-5.0-02P terminal blocks for output circuits; 5 is 2РМ14Б4Ш1В1 connector for supplying mains voltage; 6 is the ground bolt; 7 is the electrical enclosure.

Figure A.2. Dimensions of the Unit (01К Version)

Figure A.3. Pin Numbering of XP1 Connectors (for Supply Voltage in 01P and 01K Versions)

and XP2 / XP3 Connectors (for Connecting Output Circuits in the 01P Version)

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1 are channel-status LEDs; 2 is the warranty label; 3 are 2РМ14Б4Ш1В1 connectors for intrinsically safe circuits; 4 are 2РМ14Б4Г1В1 connectors for output circuits; 5 is a 2РМ14Б4Ш1В1 connector for supplying mains voltage; 6 is the ground bolt; 7 is the electrical enclosure.

Figure A.4. Dimensions of the Unit (01P Version)

Figure A.5. Pin Numbering of XP4 and XP5 Connectors for Output Circuits (01P Version)

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Figure A.6. Arrangement of Notches in the Electrical Enclosure (01P and 01K Versions)

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APPENDIX B

Unit Wiring Diagrams

Sensors 1 and 2 are passive sensors with 4...20 mA output current signals; V1 and V2 are voltmeters; Rl1 is the load resistance for Channel One; Rl2 is the load resistance for Channel Two.

Figure B.1. Unit Wiring Diagram (DIN Version)

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Appendix B continued


Figure B.2. Unit Wiring Diagram (01К Version)

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Appendix B continued


Figure B.3. Unit Wiring Diagram (01P Version)

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APPENDIX C

Unit Verification Diagram

Rl1 and Rl2 is a 100-Ohm Р331 reference resistance coil, 0.01 accuracy class; V1 and V2 is a РС5000 multimeter; A1 and A2 is an ЭнИ-201И calibrator.

Figure C.1. Unit Verification Diagram

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Notes

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Notes

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Notes

Documents

CONTENTS 9 MARKING AND SEALING 11 …...5.3 The intrinsic barrier is compliant with GOST 31610.0-2002 and GOST 31610.11 and is based on duplicated Zener diodes with serially-connected