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Using the RS-485 interface
The RS-485 port has tri-state capabilities and allows a single pair of wires to share, transmit and receive signals for half-duplex communications. This “two wire” configuration (note that an additional ground conductor should be used) reduces the cabling cost. RS-485 devices may be internally or externally configured for two wire systems. RS-485 port is internally configured and thus it simply provides A and B connections (sometimes labeled ”-” and ”+”).
| RJ-45 Pin | Pin name | CANON DB-9 Pin | Function |
| 1 | GND | 5 | Signal Ground |
| 2 | RxD | Do Not Use | Do Not Use |
| 3 | TxD | Do Not Use | Do Not Use |
| 4 | GND | Do Not Use | Do Not Use |
| 5 | RxD | Do Not Use | Do Not Use |
| 6 | TxD | Do Not Use | Do Not Use |
| 7 | A | 3 | ( - ) |
| 8 | B | 7 | ( + ) |
Alternatively A, B and GND wires can be connected directly to the PLC or device without a need of using BD-9 connector as such.
