KRAMER ELECTRONICS, LTD.
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Table 3: DIP Switches Configuration
MACHINE
NUMBER
DIP SWITCH #
MACHINE
NUMBER
DIP SWITCH #
5
6
7
8
1
2
3
1.
OFF
OFF
OFF
OFF
1. (Master)
OFF
OFF
OFF
2.
OFF
OFF
OFF
ON
2.
OFF
OFF
ON
3.
OFF
OFF
ON
OFF
3.
OFF
ON
OFF
4.
OFF
OFF
ON
ON
4.
OFF
ON
ON
5.
OFF
ON
OFF
OFF
5.
ON
OFF
OFF
6.
OFF
ON
OFF
ON
6.
ON
OFF
ON
7.
OFF
ON
ON
OFF
7.
ON
ON
OFF
8.
OFF
ON
ON
ON
8.
ON
ON
ON
9.
ON
OFF
OFF
OFF
10.
ON
OFF
OFF
ON
11.
ON
OFF
ON
OFF
12.
ON
OFF
ON
ON
13.
ON
ON
OFF
OFF
14.
ON
ON
OFF
ON
REPLY
DIP SWITCH
#4
15.
ON
ON
ON
OFF
Transmission disabled
OFF
16.
ON
ON
ON
ON
Transmission enabled
ON
Figure 2: DIP switches - General View
RS-232 and RS-485 Operation
Connections made between your switcher and a PC are accomplished using your computer’s RS-232
communication port, or by connecting the PC to the RS-485 terminal block connector. Bear in mind that
serial communication between matrix switchers is always via RS-485 (see example in Figure 5). The
RS-232 port is either a DB-9 (9-pin port) or DB-25 (25-pin port). The cable connecting your switcher to
the PC should be wired as shown in Figure 3. A 9-25 pin adapter or 9 to 9 pin null-modem adapter is
included for your convenience. The null-modem adaptor is wired as shown in figure 3. If you are using
the adaptor (recommended), plug it into the PC’s serial port, and connect via a flat-cable from the other
end of the adaptor to your switcher. Please keep in mind that it is not recommended to extend an RS-232
signal beyond a length of 30 feet, without the use of an RS-232 to RS-422 converter at both the PC and
the switcher.
If, for example, five machines and a PC are cascaded together, using RS-485 interconnection, external
termination resistors of 120 ohms should be placed as described in figure 4.
