B&B Electronics 232XS5 Manual page 17

You could then send SWB$ to select port B of Expansion switch
unit address "C". Similar strings could be used for turning on the
other ports. To turn off the ports the string might look like this:
TOFF$ = CHR$(27) + CHR$(2) + CHR$(4)
When you are done with a port you can either select a new one
directly or turn off the selected port and then turn on the next one.
For information on preventing command codes from being received
by slave devices, refer to the Enhanced Mode section.
Table 9 - 232XS5 Expander Mode Commands
Function
Select Port A
Select Port B
Select Port C
Select Port D
Select Port E
Select Port A
Select Port B
Select Port D
Select Port E
Select Port A
Select Port B
Select Port D
Select Port E
Select Port A
Select Port B
Select Port D
Select Port E
Deselect Port
Set Timer Value
Set Timer Mode
* X represents the programmable character set by dipswitch SW2
** NU = Not Used
***Port C is used as the expansion port for unit addresses B thru D.
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Command Characters
1st 2nd
ESC X*
ESC X*
ESC X*
ESC X*
ESC X*
ESC X*
ESC X*
ESC X*
ESC X*
ESC X*
ESC X*
ESC X*
ESC X*
ESC X*
ESC X*
ESC X*
ESC X*
ESC X*
ESC X*
ESC X*
PH (815) 433-5100 -- FAX (815) 433-5109
3rd 4th
"A" "A"
"A" "B"
"A" "C"***
"A" "D"
"A" "E"
"B" "A"
"B" "B"
"B" "D"
"B" "E"
"C" "A"
"C" "B"
"C" "D"
"C" "E"
"D" "A"
"D" "B"
"D" "D"
"D" "E"
EOT NU** Switching Command
"T" "0"-"9"
"M" "0","1"
232XS53800 Manual
Comments
Address A
Address A
Address A
Address A
Address A
Address B
Address B
Address B
Address B
Address C
Address C
Address C
Address C
Address D
Address D
Address D
Address D
Enhanced Mode
Enhanced Mode