Ground Fault Alarm (Signal Output)
ABB · ACS880-07 Hardware
What does ALARM 2 mean?
This alarm signal from the ground fault monitor (option +Q954) is intended for general alarm indication purposes, rather than directly tripping the drive. The contact is normally closed when no ground fault is present and has a higher load capacity of 250 V AC, 8 A. It is crucial to understand that the monitor's internal self-testing might briefly activate this signal, requiring careful interpretation by any receiving alarm or monitoring system.
Additional Steps
Steps 1–2 are listed in Priority Fix.
- 3
Examine the wiring of the 'Alarm 2' output at terminal X954 (pin 2) to ensure secure and correct connections to the auxiliary alarm system or PLC input.
- 4
Assess the ground fault monitor's overall operational status and calibration to systematically rule out any internal device malfunctions or incorrect configuration.