Specifications

4 232XSSD43800 Manual
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH [phone] -- FAX [phone]
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 (
D
ata
T
erminal
E
quipment) device
to a DCE (
D
ata
C
ommunication
E
quipment) 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
0000XXXX300 Baud
1000XXXX600 Baud
0100XXXX1200 Baud
1100XXXX2400 Baud
0010XXXX4800 Baud
1010XXXX9600 Baud *
0110XXXX19.2K Baud
1110XXXX38.4K Baud
XXXX0XXX8 Data Bits *
XXXX1XXX7 Data Bits
XXXXX0XXSmart Switch Mode *
XXXXX1XXSmart Switch and
Port Combiner Mode
XXXXXX0X3 Char. Command *
XXXXXX1X4 Char. Command
XXXXXXX0Port Select Test Off *
XXXXXXX1Port Select Test On
0 = OFF 1 = ON X = DON'T CARE
* = FACTORY DEFAULT