B&B Electronics Port Expander 232PE - Manual (Page 9)

232PE3095 Manual 5
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 434-7094
Port Configuration
The 232PE has four selectable ports labeled "A" through "D".
Refer to Figure 8. Any of the ports can be manufactured to meet
either RS-232 or RS-422/485 electrical characteristics.
RS-232 Configuration
RS-232 ports will be wired as DTE ports. Refer to Table 2 for
pin out, signal name, and signal direction information. Also, refer to
Figure 4 for a simplified schematic showing the relationship
between the master port of the 232XSS and any RS-232 port of the
232PE. Refer to Appendix B for cable charts.
Table 2. RS-232 DTE PORTS A - D
Pin # Signal Description
RS-232 Signal
Direction of
DTE Ports A
through D
2 TD Transmit Data Output
3 RD Receive Data Input
4 RTS Request to Send Output
5 CTS Clear to Send Input
6* DSR Data Set Ready Input
7 SG Signal Ground <------>
8* CD Carrier Detect Input
20 DTR Data Term Ready Output
* Pins 6 & 8 are tied together inside the 232PE and
share the same input, refer to Figure 4.