Introduction
UC Open
CARRIER CORPORATION ©2019
Installation and Start-up Guide
All rights reserved
2
Maximum number of third-
party integration points
using Snap*†
10
* Depends on available memory
† BACnet third-party integration points are not counted.
Power
24 Vac ±10%, 50–60 Hz
20 VA power consumption
26 Vdc (25 V min, 30 V max)
Single Class 2 source only, 100 VA or less
BACnet Port
For communication with the controller network using BACnet ARC156 (156
kbps) or BACnet MS/TP (9600 bps – 76.8 kbps)
Rnet port
•
Supports up to 15 wireless and/or ZS sensors, and one Equipment Touch or
TruVu™ ET Display
•
Supplies 12 Vdc/210 mA power to the Rnet at an ambient temperature of
77°F (25°C) with a 24 Vac nominal power source.
NOTE Ambient temperature and power source fluctuations may reduce the
power supplied by the Rnet port.
NOTE
If the total power required by the sensors on the Rnet exceeds the power
supplied by the Rnet port, use an external power source. The Wireless Adapter,
Equipment Touch, or TruVu™ ET Display must be powered by an external power
source. See the specifications in each device's Installation and Start-up Guide to
determine the power required.
Local Access port
For system start-up and troubleshooting using Field Assistant
Inputs
6 inputs configurable for thermistor or dry contact.
1 and 2 are also configurable for 0–5 Vdc sensors.
NOTE
Input 5 has a maximum temperature of 140°F (60°C).
Input resolution
10 bit A/D
Binary outputs
5 binary outputs, dry relay contacts rated at 1 A max. @ 24 Vac/Vdc, configured
normally open
Output resolution
10 bit D/A
Real time clock
Battery-backed real time clock keeps track of time in the event of a power failure
Battery
10-year Lithium CR2032 battery retains the following data for a maximum of
10,000 hours during power outages: control programs, editable properties,
schedules, and trends.
Protection
Built-in surge and transient protection for power and communications in
compliance with EN61000-6-1.
Incoming power and network connections are protected by non-replaceable
internal solid-state polyswitches that reset themselves when the condition that
causes a fault returns to normal.
The power, network, input, and output connections are also protected against
transient excess voltage/surge events lasting no more than 10 msec.
CAUTION
To protect against large electrical surges on serial EIA-485
networks, place a PROT485 at each place wire enters or exits the building.
Status indicators
LEDs indicate status of communications, running, errors, and power.
