2TLC172245M0201, rev. B
8
www.abb.com/jokabsafety
2013-04-22
Variants
MKey8 – Standard version with spring lock
The version of MKey8 with die cast housing and spring lock. The switch has a contact block configuration of
2NC+2NC with positive force disconnection contacts. One pair closes when the actuator key is pushed into the
head (2NC). The other pair closes when the locking mechanism is in the locked position (2NC). There are two NO
auxiliary circuits, 1 NO circuit for indication of guard open and on another 1 NO circuit for indication of lock status.
MKey8Z – Stainless steel version with spring lock
MKey8Z – Stainless steel version with rugged stainless steel housing and spring lock. The switch has a contact
block configuration of 2NC+2NC with positive force disconnection contacts. One pair closes when the actuator key
is pushed into the head (2NC). The other pair closes when the locking mechanism is in the locked position (2NC).
There are two NO auxiliary circuits, 1NO circuit for indication of guard open and on another 1 NO circuit for
indication of lock status.
MKey8M – Power to lock version with magnetic lock
The version of MKey8 with die cast housing and magnetic lock. The switch has a contact block configuration of
2NC+1x(NC+NO) with positive force disconnection contacts. One pair closes when the actuator key is pushed into
the head (1NC+1NO). The other pair closes when the locking mechanism is in the locked position (2NC).
A 1NO/1NC circuit gives an indication of actuator status.
