Device description
Leuze electronic
MC3x
11
3
Device description
The sensor system consists of the MC3x sensor, the MC3xA actuator and the corresponding MSI-MC3x
Safety Relay.
The sensor contains a special combination of reed contacts that are contactlessly activated by the coded
magnetic field of the actuator. For guards that are accessible from behind, a reset button (RES) can be
connected to the MSI-MC3x for manual starting. Evaluation of the RES signal is monitored edge-depen
-
dent.
If, for example, a door is opened, the actuator mounted here is separated from the sensor, which is located
on the stationary part of the guard. If the change in the position of the actuator reaches the maximum value
of the defined distance, the switching state is detected by the Safety Relay connected to the sensor and
is signaled to the control via two fail-safe OSSD contacts.
As a result, risky machine movements can only be executed while the guard is closed or if a stop command
is executed while the guard is being opened.
Moreover, additional switching elements can be integrated in the safety circuit. The monitoring of relays or
contactors is possible via their feedback contacts K3, K4 in the start circuit of the MSI-MC3x.
Due to the closed design of the sensors, they can also be used in critical environmental conditions (e.g.,
in areas where there is exposure to dust).
The system offers a high degree of safety and satisfies the following standards:
• Performance Level (PL) e (EN ISO 13849-1: 2008)
• Safety category 4 (EN ISO 13849-1:2008)
Depending on the application, various MC3x series are available.
1
Sensor
2
Actuator
3
Safety Relay
Figure 3.1: MC3x series with MSI-MC3x
1
2
3
1
1
2
2
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