User Manual

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User manual Version 1.0

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Pin assignments of Mini DIN connector is shown in the following table:

Pin#

RS-232

Full Duplex

RS-485

2 wire, Half Duplex

RS-485

4 wire, Full Duplex

1 DCD N/A N/A

2 RXD N/A

RxD/T+

3 TXD

TxD/R+

4 DTR N/A (reserved) N/A

5 SG (Signal Ground) SG (Signal Ground) SG (Signal Ground)

6 DSR N/A N/A

7 RTS

RTS/R-

8 CTS N/A

CTS/T-

9 N/A N/A(reserved for Atop

devices)

N/A

Atop provides Mini DIN connector to DB9 connector cable, the pin assignments of DB9 connector is

shown in the following table:

Pin#

RS-232

Full Duplex

RS-485

2 wire, Half Duplex

RS-485

4 wire, Full Duplex

1 DCD N/A N/A

2 RXD N/A N/A

3 TXD

DATA-

RXD-

4 DTR N/A (reserved)

TXD-

5 SG (Signal Ground) SG (Signal Ground) SG (Signal Ground)

6 DSR N/A N/A

7 RTS N/A N/A

8 CTS

DATA+

RXD+

9 RI N/A(reserved for Atop

devices)

TXD+

Note that RS-485 2 or 4 pins assignments of DB9 connector are different from those of Mini DIN connector.