Precision Digital PD138 - Manual (Page 23)

PD138 Minimux
®
II Temp & Process Scanner Instruction Manual
23
Stop or Continuous Scanning On Alarm
The PD138 can be programmed to either stop or continue scanning
when it encounters a channel in alarm. See page 22 for further details on
this function
DIP
Switch 1
Position
Function
OFF Continuous scan (Factory Default Setting)
ON Stop-on-alarm
Selecting Alarm Sequence
The PD138 can be programmed to respond to alarm conditions either via
Sequence A or Sequence F2A. Refer to page 26 for a description of
these sequences.
DIP
Switch 2
Position
Alarm Sequence
OFF A (Factory Default Setting)
ON F2A
Relay Fail-Safe
In fail-safe operation, a relay coil is energized in non-alarm condition. In
case of power failure, relays will go to alarm state.
DIP
Switch 3
Position
Relay Action
OFF Non-Fail-Safe (Factory Default Setting)
ON Fail-Safe
Note: The power must be cycled after making changes to the fail-safe
operation.