COMMUNICATION
EATON
Powerware
®
Energy Management System (EMS) Upgrade Kit User’s Guide
S
164201724 Rev 1
www.powerware.com
52
Control Terminals
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.
+ Polarity
– Polarity
1
+ Polarity
– Polarity
2
Building Alarm 1
Building Alarm 2
Normally Closed
Normally Open
NC
NO
Common
C
Relay Output
EMS−UGK
Connectors
(see Figure 20 on
page 49)
+ Polarity
– Polarity
4
Building Alarm 4
+ Polarity
– Polarity
3
Building Alarm 3
TB1
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.
