Siemens SINAUT ST7 - Page 132

Network Configurations
© Siemens AG 2002 All Rights Reserved 6NH7811-0AA22
MD2 Modem (07/2002) 5-39
Table 5-26 Settings for the 2-wire tapping point
Settings on the DIL switches accessible from above (see Fig. 2-3 and 2-4)
5-pin and 10-pin DIL switch Meaning
2-wire operation
channel 1
"With RS485 interface" operating mode
The baud rate must be selected with switches 4 and 5 on
the 5-pin DIL switch and the character recognition with
switches 5 to 7 on the 10-pin DIL switch.
Settings on the DIL switch accessible from below (termination resistors)
Type of
connection
Baud rate
Setting on
DIL switch
Note
1200 bps
2400 bps
The MD2 is not located at the beginning or end of a 2-wire
line; it taps into this 2-wire line somewhere along the way
with high resistance. The transmission speed is set to 1200
or 2400 bps.
(see Fig. 2-6)
Tapping point
2-wire
9600 bps
19200 bps
Tapping point as above but with transmission speed set to
9600 or 19200 bps.
(see Fig. 2-6)
Settings on the DIL switch accessible from below (port)
Interface type
Setting on
DIL switch
Note
RS485 interface
Activation of the RS485 interface
(see Fig. 2-6)
Settings on the LTOP2 switches
Switch
Switch
position
Note
Switch S1
2-wire channel (pins 2 and 5) activated
(see Fig. 2-18)
Switch S2
2-wire channel (pins 2 and 5) activated
(see Fig. 2-18)
1
2
1
2
3
4
OFF
ON
1
2
OFF
ON
1
2
3
4
5
1
2
3
4
5
6
7
8
9
10
OFF
ON
1
2
3
4
OFF
ON
1
2
3
4
OFF
ON