90 Eaton BladeUPS 5 kVA to 60 kVA (N+1) User’s Guide 164201649—Rev 14
10. Verify that a blue terminating plug is installed in the CAN IN port on the first UPS (UPS 1 in Figure 65 ) and
a blue terminating plug installed in the CAN OUT port on the last UPS (UPS 3 in Figure 66 )
• If you are modifying a legacy configuration, install a blue terminating plug in the CAN IN port on the
first UPS. This blue terminating plug replaces the black terminating plug removed from the CAN IN
port in Step 8. Also install a blue terminating plug in the CAN OUT port on the last UPS.
• If you are installing a UPS in an existing, new configuration, verify that a blue terminating plug is
installed in the CAN IN port on the first UPS and a blue terminating plug installed in the CAN OUT port
on the last UPS. After adding the new UPS, verify that only the first and last UPSs in the configuration
have a blue terminating plug installed.
11. Install the BladeUPS modules in the rack by lifting and sliding them into the rack on the rail kits.
12. If not already installed, using the supplied connectors, install a CAN Bridge Card cable between each UPS
as shown inFigure 67 , connecting the CAN OUT port on one UPS to the CAN IN port on the next UPS.
On startup, the parallel system will identify the UPS wired after UNIT 1 as UNIT 2, and so forth.
NOTE You can configure the parallel system with UPS 1 at the bottom of the rack or at the top
of the rack.
13. For a parallel system not previously shut down, verify that any alarms related to reconfiguring the CAN
Bridge Cards have cleared.
14. Install a redundant signal cable between the For Parallel Use Only and Standalone/Parallel terminals on
each UPS as shown inFigure 67 .
Be sure to check correct polarity when installing the cable.
CAUTION
If polarity or wiring is not correct, the parallel system does not operate normally. For example, when shutting
down one UPS, the remaining UPS transfers the load to bypass instead of supporting the load. Verify that all
wiring is correct for proper operation.
15. If your rack has conductors for grounding or bonding of ungrounded metal parts, connect the ground cable
(not included) to the ground bonding screw.
16. You can install an optional REPO circuit that will shut down the entire parallel system using a single switch,
install the REPO switch before powering on the parallel system.
17. Connect the parallel input cord from each paralleled UPS:
• Loosen the two screws on the plug retainer and slide the plug retainer out.
• Gently loop and twist the parallel input cords as shown to minimize stress on the cords. The loop and
twist for each cord may vary depending on configuration and strain relief to the BladeUPS Bar in the
rack.
• Insert the parallel input cord into the socket. The plug is fully seated when the plug latches snap into
place.
• Slide the plug retainer back in and tighten the screws.
NOTE The plug retainer prevents the plug from being inadvertently unplugged.
18. If the BladeUPS system was shut down to add the new modules. If the BladeUPS system remained
operational, continue with step 21.
19. Switch the new UPS input circuit breaker to the ON ( | ) position.
UPS Installation Into An Existing Parallel System
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