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5.8.3
Connectors and configuration switches accessible from below
The following figure shows the MD4 modem from below with the X3 RJ-12 Western jack and
the DIL switch for activating the RS-232 or RS-485 interface.
Figure 5-52
Settings with the DIL switches accessible from below
A 4-pin DIL switch on the bottom of the modem housing is accessible from below. This DIL
switch is used to activate either the RS-232 or RS-485 interface. For RS-485 operation, you
can also activate the terminating resistor. The following figure shows the possible settings in
general.
Figure 5-53
SINAUT ST7 station control system
System Manual, 09/2016, C79000-G8976-C178-10
Installation and commissioning of the modems and routers
View of the MD4 modem from below
Possible settings on the 4-pin DIL switch accessible from below
5.8 ISDN dial-up modem MD4
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