Geist Watchdog Wi Instruction Manual
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© 2017
GM1212 Geist Watchdog Wi Instruction Manual
Figure 3-4
EIA-232 COM Connection
Modbus EIA-485 Connections
The Watchdog Wi can function as a Modbus Slave over an EIA-485, 2-wire hardware
connection, as shown. When using the EIA-485 port for Modbus RTU communication,
Geist recommends an 18AWG shielded twisted pair stranded copper wire for the
connection, using no more than 2000 feet (609.6m) of wire at this specification. If longer
runs are needed, please contact Geist.
Figure 3-5
EIA-485 Connection
