AVE VSI-Pro Max operation manual Appendix J, RS-232 to RS-485/422 Converter PCB

APPENDIX J RS-232 to RS-422/RS-485 Converter

For some installations exceptional long runs are required, then RS-232 can not support for is normally limited to about 100 ft. In this case one would convert the RS-232 to RS-485 which can be extended up to about 3000 ft. Then on the other end another converter would convert back to RS-232. When using the VSI-Pro Max this additional converter is not required for already has built in RS-485 compatibility. However termination for the POS / Cash Register port is via JP2 internally to the VSI-Pro Max is required.

Jumper Setting

JP1	OPEN/CLOSE	RS485 / RS-422 Transmit Termination On/Off 120 Ohm
JP2	OPEN/CLOSE	RS-422 Receive Termination On/Off 120 Ohm
JP4	CLOSE 1-2	RS-232 TXD to DB9M Pin 3
JP4	CLOSE 2-3	RS-232 TXD to DB9M Pin 2
JP5	CLOSE 1-2	RS-232 RXD to DB9M Pin 2
JP5	CLOSE 2-3	RS-232 RXD to DB9M Pin 3
JP6	CLOSE 1-2	Enable RS-485
JP6	CLOSE 2-3	Enable RS-422
JP7	CLOSE 1-2	Enable RS-485
JP7	CLOSE 2-3	Enable RS-422

Figure 126: RS-232 to RS-485/422 Converter PCB

Jumper Setting for RS422

JP1	CLOSE	RS-422 Transmit
		Termination On 120 Ohm
JP2	CLOSE	RS-422 Receive
		Termination On 120 Ohm
JP4	CLOSE 1-2	RS-232	TXD to DB9M Pin 3
JP5	CLOSE 1-2	RS-232	RXD to DB9M Pin 2
JP6	CLOSE 2-3	Enable RS485
JP7	CLOSE 2-3	Enable RS485

Jumper Setting for RS485 (Default )

JP1	CLOSE	RS-485
		Termination On 120 Ohm
JP2	OPEN	RS-422 Receive
		Termination Off 120 Ohm
JP4	CLOSE 1-2	RS-232	TXD to DB9M Pin 3
JP5	CLOSE 1-2	RS-232	RXD to DB9M Pin 2
JP6	CLOSE 1-2	Enable RS-485
JP7	CLOSE 1-2	Enable RS-485

DB9M Pin Out

1 —————————— N/C

2 —————————— RXD/TXD

3 —————————— RXD/TXD

4 —————————— DTR True

5 —————————— GND

6 —————————— N/C

7 —————————— RTS

8 —————————— N/C

9 —————————— 12VDC Input

Figure 127: RS-422/485 Connector of the RS-232 to RS-422/485 Converter.

Figure 128: RS-232 Connector of the RS-232 to RS-422/485 Converter.

VSI-Pro Max POS / Cash Register Interface

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