Mechanical Latch Block On coil energisation the mechanical latch is engaged & holds the armature closed.This feature enables the contactors state to be maintained when re-starting after an interrupted cycle & allows power consumption reduction by enabling de-energisation of the contactor coil. Remotely actuated or by front panel button Electrical delatching pulse must be greater than 100ms Front mounting Note The unlatch coil & the contactor or relay must not be energised simultaneously. Maximum on time is 30 seconds (not continuously rated). Maximum operation frequency is 36 per hour.