Carrier TruVu TV-MPCXP1628-NR, Installation And Startup Manual

Page: 41 / 94

Wiring inputs and outputs
TruVu™ MPC Controller ( part no. TV-MPCXP1628-NR) CARRIER CORPORATION ©2021
Installation and Start-up Guide All rights reserved
35
Wiring specifications
Input wiring
Input Maximum length Minimum gauge Shielding
Thermistor
Dry contact
1000 feet
(305 meters)
22 AWG Shielded
0 – 5 Vdc
0 – 10 Vdc
1000 feet
(305 meters)
26 AWG Shielded
0 – 20 mA 3000 feet
(914 meters)
26 AWG Shielded or
unshielded
RTD 100 feet
(30 meters)
22 AWG Shielded
NOTES
•
Carrier recommends use of an external current transducer between an RTD and the TV-MPCXP1628-NR to
improve accuracy and resolution.
•
RTD inputs require either sensor calibration or an estimated offset correction for wiring resistance. See Offset
and Polarity values (page 43).
Output wiring
To size output wiring, consider the following:
•
Total loop distance from the controller to the controlled device
NOTE Include the total distance of actual wire. For 2-conductor wires, this is twice the cable length.
•
Acceptable voltage drop in the wire from the controller to the controlled device
•
Resistance (Ohms) of the chosen wire gauge
•
Maximum current (Amps) the controlled device requires to operate