Description; Application; Component Data; Figure 1. Modbus Communication Module Attached To Microtech Iii Chiller Unit Controller - McQuay MicroTech III Installation And Maintenance Manual

Description

Description
The MicroTech III
Controller into a Modbus local area network (LAN).
The Modbus Communication Module is a printed circuit board with a plastic enclosure that connects
to the left side of the McQuay D-Net™ Module as shown in Figure 1 or directly to the unit
controller. The Modbus Communication Module provides access to the unit controller variables and
parameters via Modbus.
Note:

Application

The Modbus Communication Module connects the unit controller to a building automation system
(BAS) on a Modbus local area network. It is the interface for the exchange of Modbus objects
between the network and the unit controller. Refer to the MicroTech III Chiller Unit Controller
Operation Manual for keypad details.

Component Data

Figure 1 shows the Modbus Communication Module, located on the far left-hand side of the image
below. It is connected to the AWM, which is mounted directly to the unit controller. Figure 2 shows
the important features of the Modbus Communication Module.

Figure 1. Modbus Communication Module Attached to MicroTech III Chiller Unit Controller

5
®
Modbus Communication Module incorporates a MicroTech III Chiller Unit
D-Net Performance Services is an optional feature that provides remote monitoring and
diagnostic capability for certain models of McQuay chillers. Please refer to supporting
literature, available on www.mcquay.com, for additional details about D-Net.
Modbus
D-Net module attached to unit
Communication
controller
Module
IM 969