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Operation & Maintenance Manual
Touch Panel Communication Rx
-
RX1/D1+
Touch Panel Communication Ground
-
GND
Touch Panel Communication Tx
-
TX1/D1-
MODBUS on RS485 : D-
-
TX2/D2-
MODBUS on RS485 : D+
-
RX2/D2+
MODBUS
23
AI6-
-
AI7+
-
-
AI7-
2# Compressor discharge temperature
-
AI8+
-
-
AI8-
22
AI6+
18
AI5-
1# Compressor discharge temperature
19
AI5+
16
AI4-
Chilled water inlet temperature
17
AI4+
14
AI3-
Chilled water outlet temperature
15
AI3+
12
AI2-
Cooling water inlet temperature
13
AI2+
10
AI1-
Cooling water outlet temperature
11
AI1+
AIN1
AIN2
Description
Wire No.
Pin
Connector
Table 6
MODBUS communication function is provided by standard. Chiller can unify to existing BMS net-
work using MODBUS communication. MODBUS can transmit to Lonworks or BACnet using third
transmitter for connection.
MODBUS communication composition is specified below.
1) Signal : RS-485
2) Mode : RTU
3) Baud rate : 19,200BPS
4) Parity : same
5) Letter : 8 bit
6) Pause bit : 2 bit