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Pin #
Signal
2
TD
3
RD
4
RTS
5
CTS
6*
DSR
7
SG
8*
CD
20
DTR
14**
TD(B)
15**
TD(A)
16**
RD(B)
17**
RD(A)
*Pins 6 & 8 are tied together inside the 232D4SS8 and share the
same input. Refer to Figure 5.
** RS-422/485 option if installed.
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.
Documentation Number 232D4SS84502 Manual
Table 4. DTE PORTS A - H
Description
Transmit Data
Receive Data
Request to Send
Clear to Send
Data Set Ready
Signal Ground
Carrier Detect
Data Term Ready
Transmit (+)
Transmit (-)
Receive (+)
Receive (-)
RS-232
Signal
Direction of
DTE Ports A
through H
Output
Input
Output
Input
Input
<------>
Input
Output
Output
Output
Input
Input
9
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