Unit installation

IM 736-4 7
Component Data
Figure 2 shows the external connectors of the BACnet Communication Module.
Figure 2. BACnet Communication Module External Connectors (Top View)
BCM
MCQ–3302742 Rev.___
Chiller (RS232)
BCM Ethernet
PWR
BCM RS485
(Isolated)
24VAC
Connectors
The BACnet Communication Module uses two of the connectors mounted on the top panel.
Chiller (RS232)
This connector is the interface between the MicroTech II Chiller Unit Controller and the BACnet
Communication Module.
BCM RS485 (Isolated)
This connector is the interface to the BACnet MS/TP network.
24 VAC
This connector is for the input power.
Indicators
The BACnet Communication Module has one indicator mounted on the top panel.
PWR
This indicator lights when power is applied to the BACnet Communication Module.
Switch
The BACnet Communication Module has one switch to condition BACnet Communication Module
for different data transmission rates on an MS/TP network. This switch is located inside BACnet
Communication Module (see Figure 8.)
Switch
This slide switch has two positions: one for 9600 and 19200 bps (baud) and one for 38400 bps. The
default position is 38400 bps.