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Raychem-AR-H58692-ACS30UIT2Programming-EN-1805
Override Manual:
This feature provides an additional override capability for the circuit.
Range:
0–10 hours
Default:
0 hours
Hrs:
On or off
Power Off Delay:
Continue to power the circuit when the external control devices contacts open.
Range:
0–10 hours
Default:
0 hours
Fail Safe:
The Fail Safe control button turns the power on or off to the heating cable if the circuit
loses all valid RTDs. When the last remaining sensor for control fails (or communication with the
sensor is lost), the ACS-UIT2:
•
Signals an alarm for the failure of the sensor
•
Changes control of the circuit to the fail safe control selected
•
Changes the control status display to indicate that control of the circuit is in the fail safe state
•
Records the events
When the sensor for control is returned to service, the ACS-30 controller signals that the alarm has
been cleared, returns the circuit to its normal control mode, and records both of these events.
Range:
Power On or Power Off
Default:
Power On
ASSIGNING RTDS
After the control mode and parameters are set, tap Setup|RTDs window to assign RTDs to the circuit.
Fig. 3.110
Setup|RTDs Window (Snow Melting Surface Temp Control)
When in Surface temperature control mode you have the option of setting up to four inputs through
any RTD inputs in your system. For detailed information on the RTD window refer to 2.2.3 Assigning
and Sharing RTD Control and Monitoring on page 30.
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