Connection
4 Connection
Modbus Gateway can be connected to all types of U-Match R31 indoor units (duct-type,
cassette, floor/ceiling)
Connect Modbus Gateway easily by plugging in the attached 6-pin cabel to brownish
red socket of the mainboard labeled as COM-BMS (9)
Duct-type unit Mainboard
The other of the cable connect to Modbus Gateway socket labeled as UNIT
Connect bus lines A, B and GND. If the Modbus Gateway is the last device on bus,
plug terminating resistor (120 Ω ) between the connectors A andB
Installation manual 9
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