How to wiring and connection Digital Output for PM5100.

The Digital Output (DO) on the PM5100 series power meter is used to transmit Pulse Output (POP) signals. These signals are generated internally by the meter and sent through a volt-free contact, similar to a mechanical switch.

⚙️ Key Concepts

• Pulse Generation
  The meter itself generates the pulse. The external DC source (e.g., 40VDC, 20mA) is not used to generate the pulse—it only powers the loop.

• Volt-Free Contact Behavior
  The DO acts like a switch. When the configured condition is met, the DO closes momentarily to send one pulse, then opens again.

• User Equipment Integration
  The user’s device (e.g., PLC) typically has its own DC power supply.
  ➤ The user connects this DC source to the DO terminals on the PM5100.
  ➤ When the DO closes, the circuit is completed, and the pulse is registered by the PLC.

✅ Wiring Guidelines

• Connect the positive terminal of the user’s DC power supply to one side of the DO.
• Connect the Digital Input of the PLC to the other side of the DO.
• Ensure the voltage and current ratings of the DO are within safe limits as specified in the PM5100 datasheet.

📊 Recommended Visuals

To improve clarity, include:

• Wiring Diagram showing:
  • PM5100 DO terminals
  • External DC source
  • PLC Digital Input
• Pulse Timing Diagram showing how the DO closes briefly to send a pulse

Released for: Schneider Electric Thailand