In AMETEK UPLC-II™ (Universal Power Line Carrier) systems, a “PS Alarm” stands for Power Supply Alarm, which indicates that a power supply module within the unit has failed. Types of Power Supply Alarms
The system differentiates between two types of power supply failures depending on your hardware configuration:
Main PS Alarm: Indicates that the primary (Main) Power Supply module has failed.
Red. PS Alarm: Indicates that the Redundant Power Supply module has failed. What This Means for Your System
With Redundancy: If your UPLC-II is equipped with dual, redundant power supplies, a single alarm means the system will continue operating using the healthy backup module. However, redundancy is lost until the failed unit is replaced.
Without Redundancy: A Main PS Alarm on a single-supply system results in a complete failure of the Power Line Carrier terminal, dropping communication channels and signaling a critical system trouble status to your substation’s SCADA or event recorder. Recommended Next Steps
Check LED Indicators: Inspect the front panel of the UPLC-II chassis to confirm which specific power supply unit shows a red alarm or extinguished power LED.
Verify Input Voltage: Use a digital multimeter to ensure the incoming station DC (or AC) voltage to the terminal is within normal operating limits before assuming the module is dead.
Review Manuals: For detailed diagnostic procedures and wiring schematics, consult the official AMETEK Power Instruments UPLC-II System Manual.
To help troubleshoot this, could you share if your system has dual redundant power supplies, and whether you are seeing any other concurrent alarms or dropped communication channels? UPLC-II™ – AMETEK Power Instruments