FW Murphy TDXM-DC Series, Installation And Operation Manual

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Section 10 00-02-0511
2019-07-10 13
Specifications
Power Input (Operating Voltages): 10
–32 VDC, 4.2 W max
Sensor Inputs: Up to 24 type J or K grounded or ungrounded thermocouples*
Outputs: Two (2) Outputs 0.5 A, 350 VDC, FET-sink to ground to trip
One (1) Form C Solid State Relay Output 0.125 A, 350 VDC/240 VAC
NOTE: The form C relay output is de-energized for a trip condition. The NC terminal is
closed and the NO terminal is open for trip.
Communications: RS485 Serial Port, Modbus RTU slave
Operating, Storage, and Display Temperature: -40° F to 185° F (-40° C to 85° C)
Sensor Scan Rate: Scans all channels in 2 seconds
Range:
Type J: 0° F - 1538° F (0° C - 837° C)
Type K: 0° F - 1999° F (0° C - 1093° C)
Display Type: Custom 7-segment, 7-character type with temperature
units’ indication and setpoint trip indication
Accuracy:
Cold junction: Better than ±1.0° F (±0.5° C)
Type J or K: ±2° F (±1° C); 100° F - 1999° F (38° C - 1093° C).
Cold Junction Compensation: -40°F to 185° F (-40° C to 85° C).
Open Thermocouple Detection: Drives channel reading high
NOTE: ANSI MCQ6.1 states limits of error for thermocouples.
Type J - 32° F -1382° F (0° C - 750° C) ±4.4° F (±2.2° C) or ±0.75%.
Type K - 35° F - 2282° F (0° C - 1250° C) ±4.4° F (±2.2° C) or ±0.75% whichever is
greater.
Third-Party Approvals:
CSA Class I, Division 2, Groups C and D
* We recommend the use of ungrounded thermocouples. Errors in readings with grounded thermocouples can
be the result of differences in grounding between different devices.