B&B Electronics 8 PORT SMART SWITCH CE 232D4SS8 User Manual page 9

Table 2. DCE MASTER PORT CHART
Pin #
2
3
4
5
6*
7
8*
20
14**
15**
16**
17**
* Pins 6 & 8 are tied together inside the 232D4SS8 and
share the same output. Refer to Figure 5.
** RS-422 Master port option.
Important: All jumpers must be in the same position, either DCE or
DTE positions. Do not mix positions! Refer to Figure 3 which shows
the Master port configured as a DCE port.
CAUTION: Always power down the Smart Switch before removing
its cover.
Documentation Number 232D4SS84502 Manual
Signal Description
TD Transmit Data
RD Receive Data
RTS Request to Send
CTS Clear to Send
DSR Data Set Ready
SG Signal Ground
CD Carrier Detect
DTR Data Term. Ready
TD (B) Transmit +
TD (A) Transmit -
RD (B) Receive +
RD (A) Receive -
Signal
Direction of
DCE Master
Port
Input
Output
Input
Output
Output
<------>
Output
Input
Output
Output
Input
Input
7