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3.5.6 LOW TS 2 TEMPERATURE ALARM
Purpose: If enabled, the LOW TS 2 TEMP ALARM allows for alarming of low temperature
conditions as sensed by the temperature sensor connected to the RTD2 input.
Alarm Mask: ENABLE or DISABLE
Range: –76 to 1058°F (–60 to 570°C)
Procedure: Adjust LOW TS 2 TEMP ALARM temperature setpoint to the desired value. Note
that the LOW TS 2 TEMP ALARM must be enabled in order to adjust the LOW TS 2 TEMP
ALARM temperature setpoint.
IMPORTANT:
• If no second sensor is installed this alarm should be disabled. This alarm should be enabled
and the setpoint should be appropriate for the heating application. Maintaining a minimum
9°F (5°C) differential between the LOW TS 2 TEMP ALARM temperature setpoint and the
CON-TROL SETPOINT temperature will minimize nuisance alarming due to momentary dips
in temperature. Another alternative to this is to configure the control module to use non-
latching temperature alarming.
• This alarm must be enabled and its setpoint must be below the CONTROL SETPOINT
temperature if the load shedding fail safe mode uses the TS 2 temperature reading.
3.5.7 TS 2 FAILURE ALARM
Purpose: Enabling the TS 2 FAILURE alarm will provide an indication of an open or shorted
failure of the temperature sensor connected to the RTD2 input.
Alarm Mask: ENABLE or DISABLE
Procedure: Enable or disable alarming of a failed temperature sensor connected to the RTD2
input as required.
IMPORTANT:
• If no second sensor is installed, this alarm should be disabled. This failure alarm should be
enabled if a second temperature sensor is connected to the RTD2 input.
• This alarm is always latched and must be reset by the user.
3.5.8 CONTROL TS FAILURE ALARM
Purpose: Control TS FAILURE ALARM indicates a failure of the temperature sensor designated
as the control sensor. When this condition is present, the three-character display will always
flash “tSF” with the TEMP status LED illuminated.
The selected TS CONTROL MODE determines which RTD input(s) will be designated to provide
the control temperature. See Section 3.4.11 for a full description of the temperature sensor
control designations.
Alarm Mask: ENABLE or DISABLE
Procedure: Enable or disable the alarming of a failure of the designated control temperature
sensor as required.
IMPORTANT:
• This alarm should always be enabled. If the control module experiences a Control TS Failure
it will turn the output off until this alarm is cleared.
• This is a latching alarm unless the selected TS CONTROL MODE is ATC SLAVE then it is a
non-latching alarm and the load shedding fail safe mode is always disabled.
3.5.9 HIGH LOAD CURRENT ALARM
Purpose: Alarms current levels, which are higher than a preset limit for the application.
Alarm Mask: ENABLE or DISABLE
Range: 0.3 to 60.0 A for CM 2000+
0.3 to 120% of SWITCH CURRENT RATING for CM 2000
(CURRENT TURNS RATIO = 1.00)
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