Installing the controller
30MP Multi-chiller CARRIER CORPORATION ©2018
Installation and Start-up Guide All rights reserved
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Support this signal
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IN-1, IN-2 0–5 Vdc The input impedance of the controller is approximately 30k Ohm.
All Pulse counter Pulse counting up to 10 pulses per second.
Minimum pulse width (on or off time) required for each pulse is 50
msec.
The controller has 5 binary outputs. You can connect each output to a maximum of 24 Vac/26 Vdc. Each output is
a dry contact rated at 1 A, 24 V maximum and is normally open.
To size output wiring, consider the following:
• Total loop distance from the power supply to the controller, and then to the controlled device
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
The controller has analog outputs that support voltage. The controlled device must share the same ground as the
controller and have the following input impedance:
0–10 Vdc
Minimum impedance 2000 Ohms, max 5 mA
Ohm's law: -10V/.005a = 2000 Ohms
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