25
NOTE: For TC inputs, the minimum span is 300 °C or
600 °F, which makes it possible to increase the
sensitivity of the control parameters.
Current Transformer Input for OUT 1 Heater Breakdown
Detection (Optional)
This feature allows measurement of the load current by
means of a current transformer and signals an alarm
condition when the current is below the pre-programmed
threshold value.
Input Range: 50 mAac.
Scaling: Configurable from 10, 25, 50, and 100 Amps
(with a 1 Amp step).
Display Resolution:
- For full scale up to 9.9 Amps: 0.1 Amp.
- For full scale from 10 Amps to 100 Amps:
1 Amp.
Active Period:
- For relay output: NO or NC configurable.
- For SSR output: logic level 1 or 0 configurable.
Minimum On time to perform the measurement: 50 ms.
Outputs
Main Output (Heating):
Relay or SSR (jumper selectable)
- Relay SPDT, contact rating 3 Amps @ 250
Vac on resistive load.
- Logic output for SSR, 700 Ω maximum
load, short circuit protected.
Logic Level 1:
14 Vdc ±20% @ 20 mA
24 Vdc ±20% @ 1 mA
Logic Level 0:
Less than 0.5 Vdc
Output 2 (Cooling or Alarm 1):
NO or NC operation (jumper selectable)
Relay or SSR (jumper selectable)
- Relay SPST, contact rating 2 Amp @ 250
Vac on resistive load.
- Logic output for SSR, 700Ω maximum
load, short circuit protected.
Logic Level 1:
14 Vdc ±20% @ 20 mA
24 Vdc ±20% @ 1mA
Logic Level 0:
Less than 0.5 Vdc
Output 3 (Alarm 2 or Heater breakdown)
- Relay SPST, contact rating 2 Amp @ 250
Vac on resistive load. (NO contact only)
Alarm Functions:
Process Alarm
Deviation Alarm
Band Alarm
Type of Alarm:
- High/Low (Outside/Inside for band alarm)
- Direct/Reverse
- Standby Sequence/No Standby Sequence
Alarm Hysteresis: 0.1 to 10.0% of input span or 1 least
significant digit.
Alarm Output: Relay SPST 2 Amp @ 250 Vac resistive load.
Display characteristics
Upper Display: 3 digit 7 segment green LED display; 10
mm high.
Lower Display: 3 digit 7 segment orange LED display;
7.5 mm high.
Indicators:
- 1 red LED when main (heating) output is ON.
- 1 red LED when cooling (or alarm 1) output
is ON.
- 1 red LED when alarm 2 (or hbd alarm)
output is ON.
- 1 red LED when autotuning (Smart AT) is
enabled.
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