Mechan manufactures a range or solenoid interlocks & Air operated interlocks, these have been designed for use on machines where hazardous conditions persist even after the machine has been switched off. The robust design and heavy-duty solenoid can withstand up to 4000N hold force and energise under a lateral load. The internal specifications meet the requirements for CAT4, SIL3 and has been designed to maintain PL-e even when connected in series.