Beckhoff EP7211-0034, Пример применения

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STO function with EP7211-0034 (category 3, PL d)
EP7211-0034 - STO Function 10 Version: 1.0.0
3 STO function with EP7211-0034
(category 3, PL d)
The following application example shows how the EP7211-0034 can be wired together with an EL2904 in
order to implement an STO function according to EN 61800-5-2.
A protective door (S1 and S2) and a restart signal (S3) are logically linked on an ESTOP function block. The
EStopOut signal is transferred to the NC controller, which can be used within the functional application. The
STO input of the EP7211-0034 is operated via the delayed output EStopDelOut. Forwarding this signal to
further EP7211-0034 via the second connection is allowed. The EP7211-0034 supplies the information that
the STO function is active via the standard controller. This information is transferred to the EDM input of the
ESTOP function block and additionally to the EDM function block in order to generate an expectation for this
signal.
CAUTION
Implement a restart lock in the machine!
The restart lock is NOT part of the safety chain and must be implemented in the machine!
If the risk analysis returns the result that a restart is to be realized in the safety controller, then the restart
must also be placed on a safe input.