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10 Documentation Number 232D4SS84502 Manual
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
Figure 5. Simplified RS-232 Schematic
RS-422/485 Slave Port Option
The RS-232 transmit and receive data signals on the Master
port will be converted to balanced, full-duplex RS-422 or half-duplex
RS-485 signals with this option. The 232D4SS8 comes standard
with four RS-485 (2 or 4-wire) slave ports. Refer to Appendix B for
cable charts.
Table 5. RS-422/485 PORTS A - H
Pin # Signal Description
RS-422/485
Signal
Direction of
Ports A - H
15
TD(A) Transmit Data (-) Output
14
TD(B) Transmit Data (+) Output
7
SG Signal Ground <------>
17
RD(A) Receive Data (-) Input
16
RD(B) Receive Data (+) Input