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Page 26 AmITX-BT-I

RS-422 (COM3-4 only)

Pin # Signal Pin # Signal

1 Tx- 2 Tx+

3 Rx+ 4 Rx-

5 6

7 8

9 GND 10 5V / 12V

RS-485 (COM3-4 only)

Pin # Signal Pin # Signal

1 Tx/Rx- 2 Tx/Rx+

3 4

5 6

7 8

9 GND 10 5V / 12V

SW10/SW11 (RS-422/485 Mode Select)

RS-232 (default) RS-422 RS-485

1 ON* ON OFF

2 OFF* ON ON

See Section 4.3.8 Serial Port Mode Switch Setting (SW14, SW10, SW11)

COM Cable (optional):

COM Port Cable (length 250mm), P/N: 30-20876-0000

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