Atex & IECEx Relay Controller

Model : PR 9203B

Brand: PR Electronics

Isolated barrier and Solenoid / alarm driver for harsh and hazardous environments.

  • Explosion proof driver for solenoids, acoustic alarms and LEDs
  • Extended self-diagnostics
  • 1 or 2 channels Versions
  • Can be installed on power rail (PR type 9400) or supplied separately
  • 2.6kVAC galvanic isolation
  • SIL 2-certified via Full Assessment

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Isolated Barrier


PR Electronics

Number of Inputs

1, 2

Input Type

Contact, NPN, PNP, Pulse, Switch

Number of Outputs

1, 2

Output Type


Transmission Rate

2400 to 115200 bit/s


4500 series devices


ATEX, CCC, DNV, EAC Ex, FM, IECEx, INMETRO, SIL2 Full Assessment IEC 61508, UL

Power Supply

20…30 VDC


2.6 kVAC

Protection Degree

IP 20


109×23.5×104 mm



Other product features
Barrier Version

High Current Output, Low Current Output


1ch, 2ch


NPN, PNP, Switch


180 g


175 × 150 × 35 mm

Advanced features

  • Universal I.S. driver for the control of solenoids etc., with various I.S. data by way of three built-in I.S. barriers.
  • Two hardware versions make it possible to choose either Low (35 mA) or High (60 mA) current output.
  • Configuration and monitoring by way of detachable display front (PR 4500).
  • Selection of direct or inverted function for each channel via PR 4500 and the possibility of reducing the output current to the hazardous area to suit the application.
  • Optional monitoring of the output current to the hazardous area by way of PR 4500.
  • Optional redundant supply via power rail and/or separate supply.


  • 9203B can be mounted in the safe area or in zone 2 / Class 1, Division 2 and transmit signals to zone 0, 1, 2, and zone 20, 21, 22, including M1 mining / Class I/II/III, Div. 1, Gr. A-G.
  • Driver for controlling ON / OFF solenoids, acoustic alarms, and LEDs mounted in safe or hazardous areas.
  • The 9203B is controlled by an NPN/PNP signal or a switch signal.
  • Monitoring of internal error events via the individual status relay and/or a collective electronic signal via the power rail.
  • The 9203B has been designed, developed, and certified for use in SIL 2 applications according to the requirements of IEC 61508.
  • Suitable for use in systems up to Performance Level “d” according to ISO-13849.

Technical characteristics

  • 1 green and 2 yellow/red front LEDs indicate operation status and malfunction.
  • 2.6 kVAC galvanic isolation between input, output, and supply.


  • The devices can be mounted vertically or horizontally without distance between neighboring units.

Source: PR9203B Official Page

Product Documents:


PR Electronics Solutions:

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