Rs-422/485 Option - B&B Electronics Port Expander 232PE User Manual

Figure 4. Simplified RS-232 Schematic

RS-422/485 Option

The RS-232 transmit and receive data signals on the master
port of the 232XSS will be converted to balanced full-duplex RS-
422 or half-duplex RS-485 signals with this option.
Pin # Signal
2 TD(A)
14 TD(B)
7 SG
3 RD(A)
RD(B)
16
6
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
Table 3. RS-422/485 PORTS A - D
Description
Transmit Data (A) Output
Transmit Data (B) Output
Signal Ground
Receive Data (A)
Receive Data (B)
PH (815) 433-5100 -- FAX (815) 434-7094
RS-422/485
Signal Direction
of Ports A - D
<------>
Input
Input
232PE3095 Manual