Installing and putting a SINAUT modem into operation
5.5 MD2 dedicated line modem
Station control system
206
System Manual, 07/2009, C79000-G8976-C178-07
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56
56
1R56
WHUPLQDWLQJ
UHVLVWRU
56
WHUPLQDWLQJ
UHVLVWRU
DFWLYDWHG
Figure 5-13 Possible settings on the 4-pin DIL switch to activate RS-232/RS-485
DIL switch for activating WAN terminating resistors
On the bottom of the MD2 housing, a further 4-pin DIL switch is accessible. This switch
activates terminating resistors at the WAN end. The following figure summarizes the possible
settings, the table lists the default settings.
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RKPVFKDQQHO
RKPVFKDQQHO
+LJKUHVLVWDQFH
FKDQQHO
+LJKUHVLVWDQFH
FKDQQHO
RKPVFKDQQHO
RKPVFKDQQHO
Figure 5-14 Possible settings for the WAN terminating resistors
Table 5- 15 Default settings for the WAN terminating resistors
Attachment type
Baud rate
Setting on DIL switch
Remark
1200 bps
2400 bps
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The MD2 is located at the beginning or end of
a 2-wire or 4-wire line and is set to a
transmission speed of 1200 or 2400 bps.
End point
2-wire (channel 1)
2 x 2-wire (channel 1+2)
4-wire
9600 bps
19200 bps
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End point as above but with transmission
speed set to 9600 or 19200 bps.
1200 bps
2400 bps
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The MD2 is not located at the beginning or
end of a 2-wire line; it taps into this 2-wire line
along the way with high resistance. The
transmission speed is set to 1200 or 2400
bps.
Tapping point
2-wire (channel 1)
9600 bps
19200 bps
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End point as above but with transmission
speed set to 9600 or 19200 bps.
Tapping point
4-wire
1200 bps
2400 bps
9600 bps
19200 bps
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The MD2 is not located at the beginning or
end of a 4-wire line; it taps into this 4-wire line
along the way with high resistance.
