Galaxy VS UPS with Up to 4 Internal Battery Strings – Installation PDF
990-91261F-001

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.
  1. Remove the static switch module and the front plate from both UPSs.

    Front View of the UPS

  2. Install an additional AUX switch (provided) on the internal maintenance breaker IMB on both UPSs.
  3. Connect the non-Class 2/non-SELV signal cables between the two UPSs:
    1. Connect the non-Class 2/non-SELV signal cables (not provided) from the AUX switch terminal 21 and 22 in the internal maintenance breaker IMB in UPS 1 to J6614-5 and J6614-6 on board 640-4843 in UPS 2 as shown.
    2. Connect the non-Class 2/non-SELV signal cables (not provided) from the AUX switch terminal 21 and 22 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 Simplified 1+1 Parallel System

  4. Reinstall the front cover and the static switch module on both UPSs.
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