Function And Features; Product-Independent Requirements; Product-Dependent Requirements - IFM Electronic GM503S Betriebsanleitung

2. Function and features

The fail-safe switch detects metals without contact.
The safe state is the no-current state (output stage switched off).
The fail-safe switch corresponds to category 3 to EN 954-1 or require-
ment class 4 to DIN V 19250 / DIN V 19251 or DIN V VDE 0801 and
PDF-S to EN 60947-5-3.
Information on the classification of the unit to EN 60947-5-2 or EN
60947-5-3: Depending on the type of mounting the unit corresponds
to classification I1C40SP3S or I2C40SP3S (please also see 6. Installa-
tion, page 16).
3. Requirements for the hardware configuration
For using the fail-safe inductive switch GM503S the following must be
taken into account:

Product-independent requirements

The safety requirements of the respective application must corre-
spond to the requirements stated in these instructions.
The specified operating conditions must be complied with.
The principle of normally closed operation must be applied to all ex-
ternal safety circuits connected to the system.
By taking appropriate measures in the application it must be ensured
that the mounted fail-safe switch is subjected to a self-test within a
period of 24 hours (intermittent operation).
This is achieved by
•
switching off and on the supply voltage (≥ 0.1 s)
•
or by undamping the sensor for a sufficiently long time (≥ 3 s)
•
or by deactivating the clock input signal (≥ 3 s).

Product-dependent requirements

In case of faults within the fail-safe switch which result in the defined
safe state, measures have to be taken which maintain the safe state
when the complete control system continues to be operated.
Damaged units are to be exchanged.
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