Inst ToolsInst ToolsInst Tools
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Search
  • Books
  • Software
  • Projects
  • Process
  • Tools
  • Basics
  • Formula
  • Power Plant
  • Root Cause Analysis
  • Electrical Basics
  • Animation
  • Standards
  • 4-20 mA Course
  • Siemens PLC Course
Reading: Interposing Relay Panel (IRP) – Wiring and Testing Requirements
Share
Font ResizerAa
Inst ToolsInst Tools
Font ResizerAa
  • Courses
  • Design
  • PLC
  • Interview
  • Control System
Search
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Inst Tools > Blog > PLC Tutorials > Interposing Relay Panel (IRP) – Wiring and Testing Requirements

Interposing Relay Panel (IRP) – Wiring and Testing Requirements

The components location, wiring, and termination in the Interposing Relay Panel (IRP) shall be as per the approved system drawing.

Last updated: March 4, 2021 10:53 am
Editorial Staff
PLC Tutorials Control Systems
1 Comment
Share
3 Min Read
SHARE

Interposing Relay Panel (IRP)

Interposing Relay Panel (IRP)

Check the locations of the components like relay’s and Terminal blocks in the IRP panel shall be as per the approved IRP GA/IA drawing. Refer to the above photograph for easy understanding.

Contents
Interposing Relay Panel (IRP)Termination of Digital Input (DI) signalsTesting of the Digital input (DI) SignalsTermination of Digital Output (DO) SignalsTesting of Digital Output (DO) Signals

Also Read: What Is Interposing Relay in a PLC?

Termination of Digital Input (DI) signals

  • Identify the terminal block for the DI signal as per Instrument wiring interconnection drawing and Electrical schematic wiring drawing.
  • Check the cross-wiring between the Electrical side MCC terminal and the System side Instrument terminal.
  • Check the proper ferrule for the input signal i.e. Status, L/R, and Fault from and to assigned terminals.

Testing of the Digital input (DI) Signals

  • Identify the terminal block for the DI signal as per Instrument wiring interconnection drawing and Electrical schematic wiring drawing.
  • Short the terminal blocks of the DI signal at the MCC end in the IRP cabinet.
  • Check and ensure the continuity in the multimeter at the terminal end in the IRP cabinet for the same.
  • Repeat the above steps for each DI signal and highlight each signal in the I/O list to ensure all the DI signals are covered under the test.

Termination of Digital Output (DO) Signals

  • Identify the terminal block and relay numbering for the DO signal as per Instrument wiring interconnection drawing and Electrical schematic wiring drawing.
  • Check the cross-wiring between the Electrical side MCC terminal, Relay, and the System side Instrument terminal.
  • Check the proper ferrule for the output signal i.e. Start, Stop, and Trip from and to assigned terminals.

Testing of Digital Output (DO) Signals

  • Identify the terminal block and relay numbering for the DO signal as per Instrument wiring interconnection drawing and Electrical schematic wiring drawing.
  • Inject 24V DC with current ranging from (50-100mA) to the Coil side of the DO signal.
  • Confirm that the intended relay is energized / de-energized as per the Electrical schematic wiring drawing.
  • Check and ensure the continuity at the MCC end for the same signal using a multimeter.
  • Repeat the above steps for each DO signal and highlight each signal in the I/O list to ensure all the DO signals are covered under the test.

Note: Hope the above explanation for the wiring and testing of the Interposing relay panel is understood.

Have a nice day!!

Stay Safe!!

Author: Mohammed Khaleel

If you liked this article, then please subscribe to our YouTube Channel for PLC and SCADA video tutorials.

You can also follow us on Facebook and Twitter to receive daily updates.

Read Next:

  • Loop Test Requirements
  • Digital Signals Wiring
  • Yokogawa DCS System
  • Loop diagram Lab Exercise
  • Flow Control Loop
Don't Miss Our Updates
Be the first to get exclusive content straight to your email.
We promise not to spam you. You can unsubscribe at any time.
Invalid email address
You've successfully subscribed !

Continue Reading

Micro PLC Hardware Configuration
Mis-conceptions of PLC Ladder Logic
Control Two Motors in Sequence after Time Delay – Circuit, Operation
Siemens PLC Interview Questions and Answers
CX-Programmer Products Sorting & Counting – Omron PLC
#5 PLC Best Practices – Cryptographic and Checksum Integrity Checks
Share This Article
Facebook Whatsapp Whatsapp LinkedIn Copy Link
Share
1 Comment
  • Suresh vittamsetty says:
    September 21, 2020 at 10:22 pm

    Please can you explain freewheeling diode for inductance

    Reply

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Stay Connected

128.3kFollowersLike
69.1kFollowersFollow
210kSubscribersSubscribe
38kFollowersFollow

Categories

Explore More

Pre-commissioning or Commissioning Activities
Proportioning Feedforward action
PLC FBD Example for Tank Liquid Heating Control by Steam Flow
CX-Programmer Tutorial: 1 Button To Activate 4 Different Machines
Recognizing a Porpoising PID Controller
Why we use Diode Protection Modules ?
Motor Feedback Fail Logic in PLC
Chemical Reactor Temperature Control System

Keep Learning

PLC Programming for Train Detection and Gate Operation

PLC Programming for Train Detection and Gate Operation

Yokogawa DCS

Yokogawa DCS and SIS System Architecture

PLC Engineers Interview Questions

PLC SCADA Engineers Interview Questions and Answers

Different PLC available in the Simatic S7 generation

Overview of SIEMENS PLC – S7-1500, S7-1200, S7-400, S7-300

How to Prevent Ground Loops in Analog Circuits?

How to Prevent Ground Loops in Analog Circuits?

PLC Example to Control LEDs Via Switches

PLC Example to Control LEDs Via Switches

Fixed Type Motor control center (MCC)

Motor Control Center (MCC) Signal Interface Termination (SIT)

4 TO 20 MA ANALOG CURRENT SIGNALS

Basics of 4 to 20 mA analog Signals

Learn More

Digital Electronics Multiple Choice Questions

Integrated Injection Logic (IIL) Objective Questions

Ammonia Gas Detector Calibration

Ammonia Gas Detector Working Principle and Calibration

Instrument Zero and Span Calibration

Instrument Zero and Span Calibration

Control Valves Classification

Classification of Control Valves

Single Phase Preventer Relay

Working Principle of Single Phase Preventer Relay

Power Electronics Objective Questions

Thyristor Firing Circuit Quiz

How-to do Security of SCADA Systems

How-to do Security of SCADA Systems?

what is calibration

Important Terms in Calibration

Menu

  • About
  • Privacy Policy
  • Copyright

Quick Links

  • Learn PLC
  • Helping Hand
  • Part Time Job

YouTube Subscribe

Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Welcome Back!

Sign in to your account

Username or Email Address
Password

Lost your password?