B&B Electronics 8 PORT SMART SWITCH CE 232D4SS8 User Manual
Page 9
Documentation Number 232D4SS84502 Manual
7
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
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.
Table 2. DCE MASTER PORT CHART
Pin #
Signal
Description
Signal
Direction of
DCE Master
Port
2
TD
Transmit Data
Input
3
RD
Receive Data
Output
4
RTS
Request to Send
Input
5
CTS
Clear to Send
Output
6*
DSR
Data Set Ready
Output
7
SG
Signal Ground
<------>
8*
CD
Carrier Detect
Output
20
DTR
Data Term. Ready
Input
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 output. Refer to Figure 5.
** RS-422 Master port option.