User manual

35InRow RC Installation
Building Management System (BMS). The Modbus interface allows each InRow RC to
communicate with the BMS. Use a three-wire cable to connect each InRow RC in turn. Wire a terminator
resistor (150 Ohm, 1/4 W) into the Modbus master and the final InRow RC between Modbus D0 and
Modbus D1. This terminator is included in the installation kit (see “Install kit inventory” on page 4).
Each InRow RC has a three-wire Modbus terminal on the user interface. A connector with screw
terminals is used to attach wiring. See “User interface connectors” on page 31 for specific layout of the
user interface.
For information on setup of Modbus parameters, see the InRow RC Operation manual.

Termination resistor (provided)

Modbus cable (RS-485)
First InRow RC Second InRow RC Last InRow RC
Modbus master