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COMMUNICATION
Control Terminals
52
EATON Powerware
®
Energy Management System (EMS) Upgrade Kit User's Guide
The cables should be connected to the control terminals with a mating
connector. The relay contact terminals have functional electrical isolation
from the system. The building alarms share a common (–) through
100 ohms, and have functional electrical isolation from the system, but
not from each other.
TB1
EMS−UGK
Connectors
(see Figure 20 on
page 49)
TB2
Figure 22. External Control Terminal Connections
NOTE If using a semiconductor switch type, pay attention to the proper polarity. A relay or
other contact closure is preferred.
1
+ Polarity
– Polarity
2
+ Polarity
– Polarity
3
+ Polarity
– Polarity
4
+ Polarity
– Polarity
C
Common
Normally Open
NO
NC
Normally Closed
S
164201724 Rev 1 www.powerware.com
Building Alarm 1
Building Alarm 2
Building Alarm 3
Building Alarm 4
Relay Output
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