A.1 Wiring
Wire the BB2-7010 as illustrated above. Follow all conventional standards for wiring of
EIA-485 networks when connecting the Modbus RTU EIA-485 (RS485) network. This
includes use and termination of shield, termination of the network, and grounding.
IMPORTANT: Although EIA-485 (RS485) is thought of as a 2-wire network, you MUST
include a third conductor connected to GND or common at each device so that all
devices are operating at close to the same ground potential. Proper grounding of
equipment should ensure proper operation without the third conductor; however,
proper grounding often cannot be relied upon. If large common mode voltages are
present, you may even need to insert optically isolated repeaters between EIA-485
devices.
A. Hardware Details
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