2.13 RS-485 bus connections.
The RS485 bus is used to communicate between the different Card readers and remote printer interface etc.
All units are connected in parallel on the bus as shown in the connecting diagram below. "Star"-connections
exceeding 0.3m in length are not allowed, but the order in which the different addresses are installed is not
important.
95T ACM/ACW/ACP/ERC:
90T RKP ACM/ACW/ERC:
The bus must be terminated in each end with 220 Ohm resistors. As this terminating resistor is delivered with all
devices, it must be removed from the devices connected to the bus between the two ends of the bus.
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