Eclipse UDC2500 Limit, Manual

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Installation
8/05 UDC2500 Universal Digital Limit ControllerProduct Manual 13
2.4 Limit and Alarm Relay Contact Information
Limit Relay
ATTENTION
The Limit relay is designed to operate in a Failsafe mode. This results in momentary
(5 seconds maximum) limit action when power is initially applied, until the unit completes self-
diagnostics. If power is lost to the unit, the Limit Control Relay will still function.
Table 2-2 Limit Relay Contact Information
Variable NOT in Limit State Variable in Limit State Unit
Power
Limit
Control
Relay
Wiring
Relay
Contact
Indicators Relay
Contact
Indicators
N.O. Open Open Off
N.C. Closed
Off
Closed
Off
N.O. Closed Open On
N.C. Open
Off
Closed
On
Alarm Relays
ATTENTION
Alarm relays are designed to operate in a failsafe mode (that is, de-energized during alarm
sate). This results in alarm actuation when power is OFF or when initially applied, until the unit
completes self diagnostics. If power is lost to the unit, the alarms will de-energize and thus the
alarm contacts will close.
Table 2-3 Alarm Relay Contact Information
Variable NOT in Alarm State Variable in Alarm State Unit
Power
Alarm Relay
Wiring
Relay
Contact
Indicators Relay
Contact
Indicators
N.O. Open Open Off
N.C. Closed
Off
Closed
Off
N.O. Closed Open On
N.C. Open
Off
Closed
On