Eaton Powerware 9155 User Manual page 32

Parallel ups 8–15 kva

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INSTALLING OPTIONS

EATON Powerware

NOTE If you are installing another X-Slot card, be sure to install the Powerware Hot Sync

CAN Bridge Card in X-Slot 2.

Loosely install the Powerware Hot Sync CAN Bridge Card into an

open X-Slot on the front of the UPS. You may want to remove the

terminal block from the CAN Bridge Card for better wiring access.

Strip shielded, four-wire, twisted-pair wire for CAN Bridge Card

wiring. Recommended wire size is 18 AWG maximum.

Install the CAN Bridge Card wiring between each UPS (see

Figure 19). Be sure to check correct polarity for Pins 8 and 9:

Connect SHIELD Pin 10 on all cards together.

Connect CAN H Pin 9 and CAN L Pin 8 (twisted pair) on all cards

together.

Connect COM Pin 4 and NC Pin 3 (twisted pair) on all cards

together.

Install the pull-chain wiring between the CAN Bridge Card and

Signal Input 2 on each UPS and daisy chain the wiring to each UPS.

Be sure to check correct polarity (see Figure 19):

Connect COM Pin 4 to Signal Input 2 Pin 1 on each UPS.

Connect NC Pin 3 to Signal Input 2 Pin 2 on each UPS.

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 all CAN Bridge Card wiring is correct for proper

operation.

NOTE Signal Input 2 can still be used for building alarms; it is automatically rerouted to

the CAN Bridge Card.

9155 Parallel UPS (8–15 kVA) User's Guide

C A U T I O N

164201592 C www.eaton.com/powerquality

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