Reer Mosaic MI8 Installation And Use Manual page 127

MODULAR SAFETY INTEGRATED CONTROLLER MOSAIC
When the Unlock_cmd signal is detected, the LockOut signal unlocks the guard lock after
the UnLock Time, a parameter that can be defined by the user.
The time after which the electromagnet is activated depends entirely on the
technical/physical characteristics of the specific device and may therefore vary according
to the type of guard lock used. Thus, since the LockOut signal controls the activation of
this device, the status of the Lock_Fbk feedback signal will change at different times,
depending on the type of guard lock. This variability can be avoided by changing the
value of the Feedback Time parameter, which is the maximum delay accepted by the
activate the electromagnet. Clearly, the following condition must be met:
This will now be explained using a practical example.
Example of operation in the "with Gate" mode
switch
The status of the safety gate is monitored by the "Gate" input via the "FBK_GATE" input.
The guard lock used in the example continues to be locked when the electromagnet is
not energised. Therefore the "Interlock spring" option must be selected.

The Guard Lock operator parameters are shown on the right. On the left there is an
example of an application diagram. The electromagnet feedback consists of two
contacts, one normally closed and one normally open. When the electromagnet is
energised the two contacts switch status. The gate feedback consists of two
normally closed contacts.
8540780 • 23/03/2017 • Rev.31
Lock_Fbk signal switches status following a request to
Feedback Time ≥ Electromagnet activation time
Figure 61 – Example of operation in the with Gate mode
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