The RS485 interface can be wired as two-wire or four-wire wiring and twisted cables must be used. With both variants the load resistance (RT=120 Ω) is the characteristic impedance of the cable.
Two-Wire Wiring
First device |
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Last device |
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Second device |
Second-to-last device |
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Four-Wire Wiring
First device |
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Last device |
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Second device |
Second-to-last device |
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Connection on the Ignition Controller
Wiring of the RS485 interface Follow these instructions for the RS485 interface wiring:
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