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
