Installing the UC Open
UC Open
CARRIER CORPORATION ©2019
Installation and Start-up Guide
All rights reserved
8
Input wiring specifications
Input
Maximum length
Minimum gauge
Shielding
0–5 Vdc
500 feet
(152 meters)
22 AWG
100 feet
(30.4 meters) unshielded
100 - 500 feet shielded
Thermistor
Dry contact
Pulse counter TLO
500 feet
(152 meters)
22 AWG
100 feet
(30.4 meters) unshielded
100 - 500 feet shielded
ZS sensors
Wireless Adapter for
wireless sensors
Equipment Touch
TruVu™ ET Display
See
Wiring devices to the UC Open's Rnet port
(page 11).
Inputs
The UC Open has inputs that accept the following signal types.
These
inputs...
Support this signal
type...
Description
All
Thermistor
Precon type 2 (10 kOhm at 77°F/25°C)
Input voltage for IN-5: 1 to 2.52 Vdc
Input voltage for all other inputs: 0.33 to 2.52 Vdc
All
Dry contact
A 3.3 Vdc wetting voltage detects contact position, resulting in a 0.3 mA
maximum sense current when the contacts are closed.
IN-1, IN-2
0–5 Vdc
The input impedance of the UC Open is approximately 30 kOhm.
All
Pulse counter
Pulse counting up to 4 pulses per second.
Minimum pulse width (on or off time) required for each pulse is 100
msec.
Binary outputs
The UC Open 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
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
