2-RELAY PROCESS 4-20 mA LOOP INDICATOR / MONITOR / WINDOW COMPARATOR OVER / UNDER PROTECTION with 24V power supply ( to power external loop)
The input signal is converted and displayed as real-world values with up to 3 decimal places.
Maximum & Minimum values are logged for 24 hours (updated every 60 min).
By default the re-transmittion parameters are set so that the output follows the input.
By setting the Span to a negative value, the device can be used as an inverter, generating a decreasing output signal as the input increases.
Other features include user programmable signal damping & all settings may be locked & code protected to avoid changes from being made by unauthorised personnel
The relays remain energised while the input signal is between the upper and lower set points.
Once de-energised, the signal must change in the opposite direction by the hysteresis amount before the relay will re-energise.
Shorting the latch pins, forces the relay to remain de-energised after a fault condition (until the short is removed).
The relay action may be swapped to energise when the setpoint is reached.
The signal recieved is converted and displayed as ‘real world’ values. (eg 0-100 °C ,not 4 -20mA).
By setting the span to a negative value, the display will indicate lower values as the input rises.
ADDITIONAL FEATURES INCLUDE:
DISPLAY OFFSET: -999 to 9999
DISPLAY SPAN: -1999 to 9999
DISPLAY RESOLUTION: 0.01 to 1.000 (adjustable)
INPUT OFFSET: 0 to 20.6mA
INPUT SPAN: 0 to 20.6mA
24V DC supply current limit (-P devices only): 23mA
MEASURMENT RESOLUTION: 20µA
RESPONSE TIME: <1-4sec
RELAY 1 and RELAY 2: UPPER/LOWER Limits: set independantly : any value within scale
RELAY 1 and RELAY 2: HYSTERESIS: set independantly : any value within scale
RELAY 1 and RELAY 2: START UP/TRIPP DELAY: set independantly : 0-99 sec
RELAY 1 and RELAY 2 :LATCH enable: set independantly : ON/OFF
RELAY 1 and RELAY 2:relay function: set independantly : energise/de energise
Display offset: -999 to 9999
Display span: -1999 to 9999
Display resolution: 0.01 to 1.000 (adjustable)
Input offset: 0 to 20.3V
Input span: 0 to 20.3V (offset + span maximum = 20.3V)
Measurement resolution: 20 uA
Accuracy ±0.3% @ 25°C (% of full scale)
Input voltage: ±15% of rated input