Wiring The Vvt Zone Controller To The Ms/Tp Network; Wiring Specifications; To Wire The Controller To The Network - Carrier VVT Zone Installation And Startup Manual

Installation

Wiring the VVT Zone Controller to the MS/TP network

The VVT Zone Controller communicates using BACnet on an MS/TP network segment communications at
9600 bps, 19.2 kbps, 38.4 kbps, or 76.8 kbps.
Wire the controllers on an MS/TP network segment in a daisy-chain configuration.
Install a BT485 on the first and last controller on a network segment to add bias and prevent signal
distortions due to echoing.
See the MS/TP Networking and Wiring Installation Guide for more details.

Wiring specifications

Cable:
Maximum length:

To wire the controller to the network

Pull the screw terminal connector from the controller's power terminals labeled Gnd and 24 Vac or Hot.
1
Check the communications wiring for shorts and grounds.
2
Connect the communications wiring to the BACnet port's screw terminals labeled Net +, Net -, and
3
Shield.
NOTE Use the same polarity throughout the network segment.
Verify that the MSTP jumper is set to MSTP.
4
10
22 AWG or 24 AWG, low-capacitance, twisted, stranded, shielded copper wire
2000 feet (610 meters)
VVT Zone Controller