Daikin AGZ Handbuch für Installation und Wartung - Seite 5
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Component Data
The Modbus communication module is a printed circuit board
that inserts directly into the serial card slot of the MicroTech II
chiller unit controller as shown in
Figure 1: Modbus Communication Module Attached to Unit Controller
Figure 2
shows the two important features of the
communication module circuit board (the Modbus network
connector and 8-pin header), which are described in the
following section.
Figure 2: Communication Module Main Features
Network
GND +
Connector
8-Pin Header
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Figure
1.
-
Modbus Network Connector
An RS-485 connector port connects the communication
module to the Modbus network. See
location and the table below for additional details.
Pin
1
2
3
8-Pin Header
The 8-pin header connects the MicroTech II chiller unit
controller to the communication module. See
header location.
5
IM 743-7 • MICROTECH II CHILLER UNIT CONTROLLER
Introduction
Figure 2
for connector
Function
Reference (GND)
Data B (+)
Data A (-)
Figure 2
for