Jumper Settings On The Rs422 A/485 Submodule - Siemens S5-155U System Manual

Jumper settings on the
RS422 A/485 submodule
System Manual
C79000-B8576-C199-03
When the submodule is delivered, the jumpers are set as shown in the
following figure. As a rule, therefore, you can use the RS 422 A/485
submodule immediately.
Front Connector
19
20
11
12
Figure 5-22 RS422 A/485 Submodule: Jumpers Settings when Delivered
With the jumpers on the switch row X3 you can remove the preset for
recognizing a break state from the two-wire line R.
When delivered, the two-wire line R is preset with the jumpers 12-14
and 4-6 so that the break state can be recognized. Pin 4 (R(A)) of the
front connector lies above a resistance on +5 V. Pin 11 (R(B)) of the
front connector lies above a resistance on ground.
If you replug the jumpers on 10-12 and 6-8, the two-wire line R is
preset as follows: pin 4 (R(A)) of the front connector lies above a
resistance on ground. Pin 11 (R(B)) of the front connector lies above a
resistance on +5 V. The break state cannot be recognized.
Interface Submodule
1
X3
2
1
X4
2
5
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