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7 RS485 Network H
7.2 Star Network Setup
The example diagram below illustrates the required hardware and wiring required for
an RS485 star network setup. The NEMTEK Power Pack may be used to provide a 12V
supply with battery backup to the FG7 and 8-way Relay Board. Note that all RS485
5-core cables should have a maximum length of 1000m and the 10-way ribbon should
have a maximum length of 1m. It is recommended that the 5-core cables for RS485
communication are shielded and that the shields are grounded only at one end of the
cable to prevent ground loops.
To set up the network, follow these steps:
1. For the connection setup between the PC and FG7 module, refer to the FG7
installer manual. The PC to FG7 link is optional to run the NEMTEK Fenceprobe
software.