Siemens ET 200S Manual page 279

Distributed i/o system

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Parameters for Digital Electronic Modules

Parameters for Digital Input Modules

Table 11-1 Parameters for Digital Input Modules

Hardware interrupt

Diagnostics: Short circuit

The input delay applies to "0" to "1" and to "1" to "0".

Short circuit of the sensor supply.

Can only be parameterized for the IM151-1 High Feature interface module and the IM151-7 CPU

If the wire break check is activated, all the unused inputs must be stabilized to prevent them from triggering

a module wire break. This can be accomplished by placing a resistor between the 24/48 V terminal

(3, 4, 7, 8) and the unused input. The resistor must provide at least 0.5 mA of input current (see "Sensor

Switching" in the table of technical specifications). This ensures that sufficient current is flowing to prevent

wire break detection.

A sensor must provide a minimum of 0.5 mA in the off state (otherwise a wire break is detected in the off

state). Alternatively, a resistor can be connected parallel to the sensor terminals (the current must be at

least 0.5 mA).

Distributed I/O System ET 200S

EWA 4NEB 780 6024-02 07

2DI/ 4DI 24 VDC ST

4DI 24 VDC/SRC

2DI 120 VAC ST

2DI 230 VAC ST

Diagnostics:

Diagnostics:

Diagnostics:

Digital Electronic Modules

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