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FT820DB Series Installation & Operation Manual

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4.2 Data port assignment and pin connections

Data ports assignment and pin connections are identical for Data1 and Data2. Data1 on Tx

communicates with Data1 on Rx and Data 2 on Tx communicates with Data2 on Rx.

For data input and output connections, please note the following pin assignment:

Pin Assignment

(Screw Terminal

Block)

Data format

RS422/485 (4-Wire)

IN(+)

IN(-)

OUT(+)

OUT(-)

N/A

RS485 (2-Wire)

IN/OUT (+)

IN/OUT (-)

N/A

RS232

N/A

OUT

Sig. COM

4-Wire RS422/485 Full Duplex Data communication connection diagram:

Transmitter End Receiver End

User’s Equipment

DATA PORT

(7-PIN)

DATA PORT

(7-PIN)

User’s Equipment

TX(+)

1 IN(+)

TX(+)

TX(-)

2 IN(-)

TX(-)

RX(+)

3 OUT(+)

RX(+)

RX(-)

4 OUT(-)

RX(-)

5 N/A

6 N/A

7 N/A

Fig. 4.4.1 Connector Pin Assignments for 4-wire RS422/485 data format at Data port

2-Wire RS485 Half Duplex Data communication connection diagram:

Transmitter End Receiver End

User’s Equipment

DATA PORT

(7-PIN)

DATA PORT

(7-PIN)

User’s Equipment

TX/RX(+)

1 IN/OUT(+)

TX/RX(+)

TX/RX(-)

2 IN/OUT(-)

TX/RX(-)

3 N/A

4 N/A

5 N/A

6 N/A

7 N/A

Fig. 4.4.2 Connector Pin Assignments for 2-wire RS485 data format at Data port.

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 16 17

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