Serial Card CE User Manual

40 Manual Document# 3PXCC4A3001
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax [phone]
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph [phone] – Fax [phone]
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.
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.
RJ45 Pin RS-422
signal
Direction MDB9
Pinout
MDB25
Pinout
1
TD(B) output 7 4
2
TD(A) output 3 2
3
RD(B) input 8 5
4
RD(A) input 2 3
5
NA NA 4 20
6
NA NA 6 6
7
NA NA 1 8
8
GND ---- 5 7