Functional description and allocation of terminal pins Manual BG41/BG42/BG43
3-16 Rev. 99/49
3.2.4.3 Point to point connection
Fig. 3-15: Point to point connection with a RS422/RS485-module
Two twisted-pair wires, which have to be particularly shielded, are to be used for the TX and RX
links.
A load resistance of 100 Ω=can be switched between the Rx links by means of the plug connector J1
on the RS422/RS485 module. This is necessary for large cable lengths or high transmission speeds.
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