Siemens FDCIO223 Technical Manual page 38

Input/output module (transponder)

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Table of Contents

Structure and function

Building Technologies

Fire Safety

Calibration of load resistances

To ensure that any load resistances (particularly those associated with coils) can

be monitored without any problems, the connected line must be calibrated during

commissioning. During calibration, the load resistance and the line resistance are

measured and stored as reference values.

The calibration process is initiated by pressing the push button on the

input/output module. Once calibration has been successfully completed,

the input/output module adopts the operating mode. This is indicated by the

input/output LEDs. The LEDs also indicate if the calibration process has failed.

With identical-polarity inverse control, the calibration process can only be

performed if the relays have dropped out. Therefore, control must be activated

following configuration so that the relay will drop out.

Control

Control is possible with or without confirmation. The various configuration options

are described in the next two sections.