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EATON Powerware
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Energy Management System (EMS) Upgrade Kit User’s Guide S 164201724 Rev 1 www.powerware.com
53
Relay Output Contacts (Alarm Relay)
The EMS−UGK incorporates a programmable relay output with potential
free contacts for remote alarm indications.
The SPDT (single pole double throw) relay provides both NO and NC
contacts. These contacts can be connected to equipment at the facility
(such as a light or an alarm bell) to signal when an alarm is active on the
EMS−UGK. This feature is useful if the EMS−UGK is located in a remote
area where the EMS−UGK horn may not be heard immediately.
W A R N I N G
The relay output contacts must not be connected to any utility connected circuits. Reinforced
insulation to the utility is required. The relay output contacts have a maximum rating of 8A
at 32 Vdc or less, derate to 1A at 60 Vdc. Do not operate above 42.4 Vpk or 60 Vdc.
Programmable Signal Inputs (Building Alarms)
The EMS−UGK incorporates four programmable signal inputs, each with
a signal and a signal return. When the signal is shorted, the input is read
as active. The pins must be shorted with maximum resistance of
10 ohm to activate the specific input. Seventeen milliamps are required
to drive the signal active.
NOTE See Figure 22 on page 52 for the polarity and verify these connections if polarity
control is required.
This feature lets you connect the EMS−UGK to your building alarms,
such as smoke detectors or overtemperature alarms. For each building
alarm, you can set:
S The building alarm name
S The contact type (NO or NC)
S The building alarm type
NOTE A building alarm programmed for REPO will trigger the REPO alarm and the alarm
associated with the building alarm number.
S The notice level
To configure the building alarms, see Setup Options" on page 42.