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Dipswitches
The dipswitches located next to the RS232 connection (Fig. 8) are used to configure the baud rate and
address of the KEEMUX. The default baud rate is 9600.
below to change the baud rate and address as needed.
BAUD RATE
The baud rate can be
changed by powering
4
down the unit,
OFF
changing the DIP
OFF
switch, and then
OFF
powering back up.
OFF
This table shows how
ON
to set the baud rate.
ON
ON
ON
UNIT ADDRESS
To allow multiple units to be controlled from a single host
port, the remote interface is designed to allow "daisy
chaining" of up to 15 units. By setting the appropriate
DIP switches, each unit can be given a unique address
(1-15). Then the unit will only respond to commands on
the bus if its address is embedded in the command. The
"loop back" DIP switch should be ON for the last unit in
the chain, and OFF for all other units. If only one unit is
being controlled, DIP switch 1 should be left ON. This
table shows how to set the unit address.
RS232 Interface Test Program
RS232 communication is configured using the RMTEST program, located on the supplied floppy disk. This software allows a
user to test the functions of an NTI KEEMUX or Multi-user/Multi-platform switch RS232 interface. The RMTEST program
generates a main menu with the 3 selections described below:
MAIN OPTIONS
1. Matrix Options
2. Setup Options
3. Quit
DIP SWITCH
BAUD
RATE
3
2
OFF
OFF
300
OFF
ON
600
ON
OFF
1200
ON
ON
2400
OFF
OFF
4800
OFF
ON
9600
ON
OFF
9600
ON
ON
9600
- send commands to the unit.
- set COM port, baud rate, and unit address
- quit the program
The default address is 1. Use the charts
DIP SWITCH
The unit powers up with a default
baud rate of 9600 and a fixed data
protocol of 8 data bits, no parity, and
1 stop bit. To change the baud rate,
unit address, and loop back (more on
the unit address and loop back later),
an 8-SPST DIP switch on the panel
near the DB-9 connectors can be
used. This table shows the DIP switch
functions and their default positions.
DIP SWITCH
8
7
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
ON
OFF
ON
ON
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
ON
ON
OFF
ON
ON
ON
OFF
ON
ON
OFF
ON
ON
ON
ON
ON
ON
8
1 2 3 4 5 6 7 8
SWITCH FUNCTION
1
loop back
2
baud rate 0
3
baud rate 1
4
baud rate 2
5
unit address 0
6
unit address 1
7
unit address 2
8
unit address 3
UNIT ADDRESS
6
5
OFF
0 (not valid)
ON
1
OFF
2
ON
3
OFF
4
ON
5
OFF
6
ON
7
OFF
8
ON
9
OFF
10
ON
11
OFF
12
ON
13
OFF
14
ON
15
OFF
ON
DEF-
AULT
ON
ON
ON
ON
ON
OFF
OFF
OFF
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