B&B Electronics 3PXCC4A manual RS-422 Pinouts, RJ45 Pin RS-422 Signal

RS-422 Pinouts

RS-422 mode supports transmit and receive data signals. The pinouts of the RJ45 connector are given in Table 6. Figure 5 shows how to connect a typical RS-422/RS-485 full duplex communication link.

RJ45 Pin

1

2

3

4

5

6

7

8

RS-422

signal

TD(B)

TD(A)

RD(B)

RD(A)

NA

NA

NA

GND

Direction

output

output

input

input

NA

NA

NA

----

MDB9 Pinout

7

3

8

2

4

6

1

5

MDB25 Pinout

4

2

5

3

20

6

8

7

Table 6. RS-422/RS-485 Pinout Description

RS-485 Pinouts

RS-485 mode supports both full and half duplex communications (transmit and receive data signals). The pinouts of the DB-9 connector are given in Table 6 (if full duplex communication is used). Figure 5 shows how to connect a typical RS-422/RS-485 full duplex communication link. Figure 6 shows how to connect a typical RS-485 half duplex communication link.

40 Manual Document# 3PXCC4A3001

B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445