Connect the IMB Signal Cables in a Simplified 1+1 Parallel System
NOTE: Route the signal cables separately from the power cables
to ensure sufficient isolation.
- Remove the static switch module from both UPSs.
Front View of the UPS
- Remove the cover from both UPSs.
Front View of the UPS
- Disconnect the signal cables from the internal maintenance breaker IMB indicator light on both UPSs.
- Remove the shelf from both UPSs.
Front View of the UPS
- Remove the front cover from the internal maintenance breaker
IMB on both UPSs.
Front View of the UPS
- Install an additional AUX switch (provided) in the OF2 position in the internal maintenance breaker IMB on both UPSs.
- Connect the non-Class 2/non-SELV signal cables between the two UPSs:
- Connect the non-Class 2/non-SELV signal cables (not provided) from the AUX switch terminal 1 and 2 in the internal maintenance breaker IMB in UPS 1 to J6614-5 and J6614-6 on board 640-4843 in UPS 2 as shown.
- Connect the non-Class 2/non-SELV signal cables (not provided) from the AUX switch terminal 1 and 2 in the internal maintenance breaker IMB in UPS 2 to J6614-5 and J6614-6 on board 640-4843 in UPS 1 as shown.
Front View of Internal Maintenance Breaker IMB
Front View of Simplified 1+1 Parallel System
- Reinstall the front cover on the internal maintenance breaker IMB on both UPSs.
- Reinstall the shelf on both UPSs.
- Reconnect the signal cables from the internal maintenance
breaker IMB to the indicator light on both UPSs.
Front View of the UPS
- Reinstall the cover on both UPSs.
- Reinstall the static switch module on both UPSs.