Installing the RTU Open
RTU Open v3 CARRIER CORPORATION ©2019
Installation and Start-up Guide All rights reserved
22
Wiring devices to the RTU Open's Rnet port
The Rnet communicates at a rate of 115 kbps and should be wired in a daisy-chain or hybrid configuration.
Supports:
• Up to 5 ZS sensors
• One Wireless Adapter that communicates with up to 5 wireless sensors
• One Equipment Touch
• One TruVu™ ET Display
ZS sensors, a Wireless Adapter, and an Equipment Touch can share the Rnet, but not SPT sensors.
Rnet wiring specifications
Use the specified type of wire and cable for maximum signal integrity.
Description 4 conductor, shielded or unshielded, CMP, plenum rated cable
Conductor 22 AWG (7x0096) bare copper if Rnet has only sensors
Maximum length 500 feet (152 meters)
Insulation Low-smoke PVC (or equivalent)
Color Code Black, white, green, red
Shielding If shielded, Aluminum/Mylar shield (100% coverage) with TC drain wire, terminated
at controller
UL temperature rating 32–167°F (0–75°C)
Voltage 300 Vac, power limited
Listing UL: NEC CL2P, or better
To wire ZS sensors to the controller
ZS Sensors are thermistor-based temperature sensors that may optionally sense humidity, CO
2
, or VOC. ZS
Sensors are wired to the Rnet port on i-Vu® Open controllers.
You can use the following ZS sensors:
• ZS Standard
• ZS Plus
• ZS Pro
The ZS CO2 model uses 190 mA during sample period. Use auxiliary 12 Vdc, unless it is the only device on
the Rnet port.
To Next Page
Loading...
Need help?
General
