Use Of The Interference-Free Module In Safety Applications; Important Notes - WAGO -SPEEDWAY 767 Manual

WAGO-SPEEDWAY 767
767-4804/000-800 8DO 24V DC 2.0A IF (4xM12)
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11 Use of the Interference-Free Module in Safety
Applications
Due to its interference-free feature, this module is suitable for passive use in
safety circuits.
If the field side supply is shut down via a safety switching device, the safety
function of the module is not active. When the interference-free module is used
correctly in a safety-related application, neither the SIL or Performance Level
achieved by the circuit nor the Category will be influenced. This requires that you
adhere to the following notes and connection diagrams:
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11.1

Important Notes

Only use SELV/PELV power supplies!
Only a power supply unit with protective extra-low voltage (SELV/PELV) shall
be used for the 24V power supply.
Prevent short circuits to external voltages on the digital outputs!
A short circuit of a digital output to external voltages (e.g. 24V field voltage
supplies) leads to backward infeed of the field voltage and loss of the safety
function. To eliminate the possibility of an error, connecting cables between the
outputs of the interference-free modules and the actuators must be laided
protected in accordance with EN 60204-1 or EN ISO 13849-2.
Short circuits between two digital outputs!
The safety switching device does not recognize a short circuit between two digital
outputs of interference-free modules. The two-channel shutdown based on
interference-free module is no safety function, but is only used to functionally
shut down actuators.
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Manual
Version 1.1.0

Use of the Interference-Free Module in Safety Applications

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