HTM F-H Optional MODBUS Module

The MODBUS module for HTM F-H plugs into the Control Board and interfaces with the on board microcontroller to provide MODBUS RTU visibility of the HTM F-H system over a half-duplex RS485 link.
Each HTM F-H system has its own unique MODBUS number allocated 1 to 247 within the configuration header of the HTM F-H. HTM F-H units are usually linked in a Master/Slave configuration to form one system. In this instance the master unit will be the only system connected to the MODBUS network.
The MODBUS module requires a 1.5 or 2 pair shielded cable daisy chained between each of the Modbus modules located in the Master units. Cable is to be supplied and installed by others.

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