Wiring Devices To The Rtu Open's Rnet Port - Carrier RTU Open v3 Installation And Startup Manual

Installing the RTU Open

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
NOTE ZS sensors, a Wireless Adapter, and an Equipment Touch can share the Rnet, but not SPT sensors.
Rnet wiring specifications
NOTE Use the specified type of wire and cable for maximum signal integrity.
Description
Conductor
Maximum length
Insulation
Color Code
Shielding
UL temperature rating
Voltage
Listing
To wire ZS sensors to the controller
ZS Sensors are thermistor-based temperature sensors that may optionally sense humidity, CO
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
NOTE The ZS CO2 model uses 190 mA during sample period. Use auxiliary 12 Vdc, unless it is the only device on
the Rnet port.
RTU Open v3
Installation and Start-up Guide
4 conductor, shielded or unshielded, CMP, plenum rated cable
22 AWG (7x0096) bare copper if Rnet has only sensors
500 feet (152 meters)
Low-smoke PVC (or equivalent)
Black, white, green, red
If shielded, Aluminum/Mylar shield (100% coverage) with TC drain wire, terminated
at controller
32–167°F (0–75°C)
300 Vac, power limited
UL: NEC CL2P, or better
22
, or VOC. ZS
2
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