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HARDWARE
10
3.2.2
RS-485 Multi-Drop
When multiple chargers are connected using RS-485, the devices on the ends of the network
needs a terminating resistor installed or enabled. On the communications board, moving the
jumper on J22 between pins 1 and 2 enables the terminating resistor. The devices in the
middle of the network do not require the terminating resistor. Move jumper on J22 between
pins 2 and 3 to disable the terminating resistor. Figure 6 and Figure 7 show examples of
multiple chargers on a RS-485 serial network.
Figure 6
RS-485 Multi-Drop 2 Chargers