Users Manual & Installation Guide
PV- 5127: Power supply module with UPS
RS232 Status signals
The Battery low and Mains failure signals together can tell three different states:
Mains failure | Battery low | Status |
0 | 0 | Running normally on mains power. |
1 | 0 | Mains alarm, running on battery. The CPU is advised to shut down if |
|
| mains power doesn’t come back within reasonable time. This time |
|
| should be configured in the UPS monitoring software. |
1 | 1 | Critical alarm. The CPU is advised to shut down immediately. |
|
| This happens in two situations: |
|
| • During mains failure and the battery is critically low. |
|
| • When the system is too hot. |
RS232 Shutdown signal
When the CPU activates the Shutdown signal for one second, the
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