Specifications

C E N T A U R U S P R I M E

Gateway Installation

Basic Information

Summary

his section will help to give a basic overview and quick summary of the

procedures needed to install the Trane-485 Gateway Panel. Detailed

instructions are also provided later in this guide. The Centaurus Prime Trane-

485 Gateway allows any front-end system (Modbus Master or BACnet/IP) that

communicates using the either industry-standard Modbus or BACnet protocols to

communicate to Trane VAV field equipment. The Trane VAV field devices will

appear to the front-end system as a series of Modbus SLAVE devices or BACnet

Devices. Each Trane-485 Controller will map to one of these devices. Real time point

data from the Trane VAV controllers is then mapped to equivalent registers, coils, and

bits on the Modbus system, or as AI, BI, AO, and BO

objects on the BACnet system. All operations are

transparent to the user and the host computer.

Connections to the Trane-485 Gateway are simple and clearly marked. They consist of:

• Power Supply, 120 Volts AC (optionally, 220 or 240 Volts AC)

• Trane-485 VAV Device trunks (up to four)

• Modbus-RTU Network, (RS-485 or IP), or BACnet/IP Network

• Local Mode Port for commissioning via Laptop Computer

All Hardware necessary to connect the Gateway to the Trane-485 devices is included

in the 16” X 14” X 8” plastic cabinet that is easily mounted in a convenient location.

The BACnet/IP network is a 10-Mbaud Ethernet, only. The Modbus

RTU Network connects to the Trane-485 Gateway via either (a) a 10-

Mbaud Ethernet, (b) an RS-422 serial link (a four-wire, full-duplex

connection), an RS-485 serial link (a two-wire, half-duplex connection),

or an (c) RS-232 serial link (a three-wire, full-duplex connection). The

RS485 or RS422 connections must be used in a multi-drop network

Chapter

I C O N K E Y

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