IFM Electronic Efector 100 GM505S, Operating Instructions Manual, Page: 12 / 21

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9 Operation
9.1 Sensor signals
The safe state is when the output is switched off (zero-current state: logic "0")� The
fail-safe sensor must be operated with a clock signal on its clock input (TE)� The
clock input signal must meet the defined time conditions (see figure)�
td
0
1
0
1
T1 T2
T
T1 ≥ 50 ms
T2 ≥ 50 ms
T = 100���500 ms
td = 1�0���1�5 ms (± 10 %)

Clock input (TE)

Output
9.2 Input characteristics / output characteristics
The electrical input characteristics are compatible with the output characteristics to
EN 61131-2 (nominal current 0�1 A and nominal voltage 24 V):
Logic "1"
≥ 11 V, < 30 V Input current approx� 3 mA
Logic "0"
≤ 5 V
Leakage current 500 µA
Permissible test pulse duration
≤ 1�0 ms
If the target is in the enable zone and there is no sensor fault, the clock input
signal is transferred to the output with the delay td� The output characteristics are
compatible with the input characteristics to EN 61131-2 type 1 or 2:
Logic "1"
≥ 15 V
≥ 11 V
2���15 mA
15���30 mA
Output impedance typ� 27 Ω
Logic "0"
≤ 5 V
Leakage current 0 mA
(pull-down current typ� 30 mA)
If the target is outside the enable zone, the output is switched off (logic "0")�
Non-observance of the time diagram (e�g� no time offset td; permanently
logic "1" → 9�1) is a fault�