NHP and Schmersal have released an innovative new switch, the MZM 100, a safety interlock with a non-mechanical operating principle – no actuator key.
The MZM 100 is a magnetic interlock, using a powerful electromagnet to lock the machine guard.
The switch detects and monitors the actuator plate through an integrated non-contact sensor that uses Schmersal’s patented pulse-echo technology.
The unique combination of the magnetic operating principle and the pulse-echo sensing
offers multiple advantages.
The switch is not subject to mechanical wear as there are no moving parts.
The non-contact sensor tolerates larger door misalignments.
The pulse echo technology allows a single safety controller to monitor multiple units, up to 31 in series and not only other MZM 100’s, but other pulse-echo units such as the AZM 200 interlock and the CSS 180 and CSS 34 safety sensors, without detriment to the safety level.
Even without a positive-linked mechanical locking mechanism, the MZM 100 fulfils the
requirements of Control Category 4 (EN 954-1) or SIL 3 (IEC 61508).
The magnetic locking principle complies with EN 60947-5-1.
The MZM 100 also has an IP 67 protection class rating, making it suitable for the food-processing industry or wherever high hygienic standards must be maintained.
NHP Electrical Engineering Products
Ph: 03 9429 2999