Carrier UC Open XP, Installation And Startup Manual, Page: 24 / 44

UC Open XP IO Installation
20 UC Open XP/UC Open XP IO
2
Set the UC Open XP IO's address on the rotary switch. For example, the switch below shows an address
of 1.
NOTE Do not change the address from the default setting of 1!
3
Turn on the UC Open XP IO's power, then turn on the attached UC Open XP's power. TheUC Open XP
reads the powered UC Open XP IO's address each time you turn on the UC Open XP.
Wiring inputs and outputs
See Appendix A (page 29) to print a blank wire list.
Input wiring specifications
Input Maximum length Minimum gauge Shielding
0–5 Vdc 500 feet
(152 meters)
22 AWG 100 feet Unshielded
100 - 500 feet Shielded
Thermistor
Dry contact
Pulse counter
TLO
500 feet
(152 meters)
22 AWG 100 feet Unshielded
100 - 500 feet Shielded
Inputs UC Open XP IO
The UC Open XP IO has 16 inputs that accept the following signal types:
Signal Type Description
Thermistor Precon type 2 (10 kOhm at 77°F). Input voltages should be from 0.489 Vdc
to 3.825 Vdc for thermistors.
Dry contact A 5 Vdc wetting voltage detects contact position, resulting in a 1 mA
maximum sense current when the contacts are closed.
0–5 Vdc The output impedance of a 0–5 Vdc or a 0–10 Vdc source must not exceed
200 Ohms. The input impedance of the UC Open XP is approximately 20
kOhm.
Pulse counter* 10 pulses per second max. Minimum pulse width (on or off time) required for
each pulse is 50 msec.