Siemens S5-135U/155U appendix Jumper Settings on RS422 A/485 Submodule, Front Connector

CPUs, Memory Cards, Memory Submodules, Interface Submodules

Jumper Settings on the

RS422 A/485

Submodule

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	1
	X3
20	2
11	1
	X4
12	2

Figure 5-26 RS422-A/485 Submodule: Jumper 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.

5-114	System Manual
	C79000-G8576-C199-06