Safety interlock switch

The MZM 100 safety interlock uses an electromagnet to lock the machine guard, therefore requiring no actuator key. The switch detects and monitors the actuator plate through an integrated, non-contact sensor that uses ‘pulse-echo technology’.

The combination of the magnetic operating principle and the pulse-echo sensing provides a variety of benefits: the switch is not subject to mechanical wear, since there are no moving parts; the non-contact sensor tolerates larger door misalignments; and the pulse echo technology allows a single safety controller to monitor up to 31 units in series.

The switch is compatible with itself and other pulse-echo units, such as the AZM 200 interlock and the CSS 180 and CSS 34 safety sensors.

The MZM 100 fulfils the requirements of Control Category 4 (EN 954-1) or SIL 3 (IEC 61508). The magnetic locking principle complies with EN60947-5-1. It also has an IP67 protection class rating, making it suitable for use in environments with high hygiene standards.