Control And Alarm Relay Contact Information; Table 2-7 Control Relay Contact Information; Table 2-8 Alarm Relay Contact Information - Honeywell UDC 3300 Product Manual

2.6 Control and Alarm Relay Contact Information

Control relays
Alarm relays
34
Table 2-7 lists the Control Relay contact information.
ATTENTION Control relays operate in the standard control mode;
i.e., energized when output state is on.
Table 2-7
Unit Power Control Relay
Off
On
Table 2-8 lists the Alarm Relay contact information.
ATTENTION Alarm relays are designed to operate in a failsafe mode;
i.e., de-energized during alarm state. This results in alarm actuation
when power is OFF or when initially applied, until the unit completes self
diagnostics. If the unit loses power, the alarms will function.
Table 2-8
Unit Alarm
Power Relay
Wiring
N.O.
Off
N.C.
N.O.
On
N.C.
UDC 3300 Controller Product Manual
Control Relay Contact Information
Control Relay
Wiring Contact
N.O. Open
N.C. Closed
N.O. Open
Closed
N.C. Closed
Open
Alarm Relay Contact Information
Variable NOT
in Alarm State
Relay Indicators
Contact
Open
Off
Closed
Closed
Off
Open
#1 or #2 Output
Indicator Status
Off
Off
On
Off
On
Variable
in Alarm State
Relay Indicators
Contact
Open
Off
Closed
Open
On
Closed
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