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5
If safety outputs are being used without test pulses:
Use shielded or separate cabling for safety outputs without output tests because short-circuits
to 24 V will not be immediately detected.
6
In the event of a fault (interruption in the 0 V line), the maximum of the leakage current will
flow in the OSSD line. The downstream control element must determine this state as being
LOW. An FPLC (Failsafe Programmable Logic Controller) must be able to detect this state.
7
Limit the line resistance of the individual lines to the downstream control element to this va-
lue in order to ensure that a short-circuit will be reliably detected between the outputs. (Also
see EN 60204, Safety of machinery - Electrical equipment of machines - Part 1: General requi-
rements.)
8
Examples of the resulting maximum coil inductivity:
1000 mH @ 0.5 A, 250 mH @ 1 A, 62.5 mH @ 2 A
Wieland Electric GmbH | BA000966 | 08/2017 [8151]
Technical data
89
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