(HST-MTD) Mechanical Time Delay Units
STAINLESS STEEL MECHANICAL DELAY SWITCH
The HST-MTD range of time delay units are designed to control access to machines with run-down times. In normal running condition the secondary keys are trapped in the unit, to release theses a primary key needs to be inserted and trapped. After inserting the primary key a pre-set timer runs down allowing the secondary keys to be withdrawn. The primary key remains trapped until all secondary keys have been returned to the unit. The HST-MTD units are available with varying run-down times and multiple lock portions. The lock portions are manufactured of stainless steel and supplied with protective dust caps as standard.