Siemens SIMADYN D Hardware Manual page 200

Technology subrack
Significance Switch S2
TTL RS422 1
2
3
HTL± (±3V) 1
2
3
TTL RS422 4
5
HTL± (±3V) 4
5
7-6
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• TTL (0V ... 5V)
The setting is made using the DIL switches S2/1 - S2/8
ON
1 2 3 4 5 6 7 8
Fig. 7-2 Switch S2
Track signals A and B are set according to the following table:
Setting
ON
ON
ON
OFF
OFF
OFF
The zero impulse can be switched indepenent from Track A or B:
ON
ON
OFF
ON
For differential signals, bus terminating resistors can be switched-in via
switch S2/6 - 8:
Significance
Track A
Track B
Zero pulse
The terminating resistors are switched-out in the OFF setting; they are
switched-in in the ON setting.
The switches can only be changed when the module has been withdrawn.
The switches are not accessible when the module is inserted.
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Significance Switch S2
TTL (0V ... 5V) 1
2
3
HTL (3V ... 8V) 1
2
3
TTL (0V ... 5V) 4
5
HTL (3V ...8V) 1
2
Switch S2
6
7
8
Industry Automation
Setting
ON
ON
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
Hardware - SIMADYN D
Edition 03.2001
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