Issue:
Understanding the functionality and configuration options for the digital outputs on the PM3255 power meter.

Product:
METSEEM3255

Environment:
Power metering device configuration and integration.

Cause:
Users need to know the available digital output modes and their applications for alarms, energy pulses, and external control.

Resolution:
The PM3255 power meter has two solid-state relay outputs (DO1 and DO2). These outputs support four operation modes:

1. Alarm:

   • Output is controlled by the meter in response to an alarm condition.
   • Relay closes (ON) when at least one alarm is active and opens (OFF) when the alarm is cleared.

2. Energy Output:

   • DO1 can be configured for active energy pulse output.
   • DO2 can be configured for reactive energy pulse output.
   • Pulse frequency (pulse/kWh or pulse/kVARh) and pulse width are configurable.

3. Disable:

   • Digital output function is disabled.

4. External:

   • Output is controlled by the meter in response to command 21000.

Released for: Schneider Electric Netherlands