B&B Electronics 8 PORT SMART SWITCH CE 232D4SS8 User Manual
Page 11
Documentation Number 232D4SS84502 Manual
9
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
The 232D4SS8 has eight ports labeled "A - H". Refer to “Rear
View”. Any of these ports can be manufactured to meet either RS-
232 or RS-422/485 electrical characteristics. The 232D4SS8 comes
standard with four RS-232 ports and four ports that are RS-232 or
RS-485 depending on the pins that you use.
RS-232 Configuration
All eight RS-232 slave ports will be wired as DTE ports. Refer
to Table 4 for pin out, signal name, and signal direction information.
Also, refer to Figure 5 for a simplified schematic showing the
relationship between the Master port and any RS-232 port "A-H".
Refer to Appendix B for cable charts.
Table 4. DTE PORTS A - H
Pin #
Signal
Description
RS-232
Signal
Direction of
DTE Ports A
through H
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
14**
TD(B)
Transmit (+)
Output
15**
TD(A)
Transmit (-)
Output
16**
RD(B)
Receive (+)
Input
17**
RD(A)
Receive (-)
Input
*Pins 6 & 8 are tied together inside the 232D4SS8 and share the
same input. Refer to Figure 5.
** RS-422/485 option if installed.