4
232XSSD43800 Manual
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 433-5104
Port Configuration
The 232XSSD4 has a Master port and eight selectable ports
labeled "A" through "H". Refer to “Rear View”. The Master port
should be connected to the RS-232 device that will be selecting the
ports. Ports "A - H” connect to the RS-232 or RS-422/485 devices
that will communicate with the Master port device.
Master Port
The Master port can be configured by the user as a DCE or a
DTE port. In order to determine the proper Master port configuration
of the 232XSSD4 it is necessary to have a basic understanding of
the terms DCE and DTE. RS-232 was designed, using DB-25
connectors, for connecting a DTE (Data Terminal Equipment) device
to a DCE (Data Communication Equipment) device. Each device
will have inputs on pins that correspond to outputs on the same pins
of the other device. For example, a DTE device transmits data out
on pin 2 and a DCE device receives data in on pin 2. IBM PC's are
DTE devices, modems are DCE devices. The Master port is
shipped configured as a DCE port.
Table 1. Communication & Configuration Switch
DIP Switch 1
1 2 3 4 5 6 7 8
Setting
0
0
0
0
X
X
X
X
300 Baud
1
0
0
0
X
X
X
X
600 Baud
0
1
0
0
X
X
X
X
1200 Baud
1
1
0
0
X
X
X
X
2400 Baud
0
0
1
0
X
X
X
X
4800 Baud
1
0
1
0
X
X
X
X
9600 Baud *
0
1
1
0
X
X
X
X
19.2K Baud
1
1
1
0
X
X
X
X
38.4K Baud
X
X
X
X
0
X
X
X
8 Data Bits *
X
X
X
X
1
X
X
X
7 Data Bits
X
X
X
X
X
0
X
X
Smart Switch Mode *
X
X
X
X
X
1
X
X
Smart Switch and
Port Combiner Mode
X
X
X
X
X
X
0
X
3 Char. Command *
X
X
X
X
X
X
1
X
4 Char. Command
X
X
X
X
X
X
X
0
Port Select Test Off *
X
X
X
X
X
X
X
1
Port Select Test On
0 = OFF 1 = ON X = DON'T CARE
* = FACTORY DEFAULT
