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Power Connection on Modules

Introduction

This section explains how to properly connect a 24VDC power supply to the Saksham PLC system, including the IM (Interface) module and all connected I/O modules. A correct and secure power connection is essential for the stable and reliable operation of the entire system.

Follow these steps to ensure safe and proper wiring for all modules.

Step 1: Locate the Power Terminals

  • On the main interface module (IM), identify the power input terminals:
  • +24VDC → for the positive supply wire
  • 0VDC → for the negative or ground wire

📌 These terminal labels are usually printed near the connection points or can be found in the module's datasheet.

Step 2: Connect the Power Supply

  • Use a regulated 24V DC industrial power supply.

Connect

  • The positive (+) wire to the +24VDC terminal
  • The negative (−) wire to the 0VDC terminal

⚠️ Ensure the power supply includes short-circuit protection to prevent damage during faults.

Step 3: Check the Wiring

Before powering up, make sure:

  • All wire connections are tight and secure
  • The polarity is correct (+ to +24VDC, − to 0VDC)
  • There are no loose wire strands that could cause short circuits

💡 Using ferrules on wire ends is a great practice for safety and neatness.

Power Supply in Module

Step 4: Turn ON the Power

  • Turn ON the 24V DC power supply.

  • Verify the following:

  • The Power LED on the module is glowing.

  • The LEDs on all I/O modules are also glowing, confirming proper power distribution.