Siemens SIMATIC NET SINAUT ST7 System Manual page 183

Table 5-19
Attachment type
End point
2-wire (channel 1)
2 x 2-wire (channel
1+2)
4-wire
Tapping point
2-wire (channel 1)
Tapping point
4-wire
Transmission speeds and frequencies of the MD2 modem
Table 5-20
Transmission
speed (bps)
1200
2400
9600 / 19,200
SINAUT ST7 Station control system - System Manual
System Manual, 05/2007, C79000-G8976-C178-06
5.4 Options for attachment and settings of the TIM 3 and TIM 4 variants
Default settings for terminating resistors at the WAN end
Baud rate
1200 bps
2400 bps
9600 bps
19200 bps
1200 bps
2400 bps
9600 bps
19200 bps
1200 bps
2400 bps
9600 bps
19,200 bps
Transmission speeds and frequencies of the MD2 modem
Center frequency
[Hz]
1700
2850
27,200
Installing and putting a TIM into operation
Setting on Remark
DIL switch
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 as above but with
transmission speed set to 9600 or
19,200 bps
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
End point as above but with
transmission speed set to 9600 or
19,200 bps
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.
Frequency Lower keying
deviation Δf (Hz) frequency (Hz)
400 1300
450 2400
6400 20,800
Upper keying
frequency (Hz)
2100
3300
33,600
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