Rockwell Automation Publication 440G-UM001B-EN-P - May 2016
7
General Description
Chapter 1
Chapter
1
General Description
442G MAB Overview
The Guardmaster® Multifunctional Access Box is an electromagnetic
interlocking device with guard locking. The system consists of one locking
module and one handle assembly. An escape release is available as an option.
The Access Box functions by extending the locking bolt from the handle
assembly into the lock module. When the locking bolt is fully extended into
the lock module, the locking arm locks the bolt in this position, preventing the
opening of the guard. The version will determine whether it’s spring force or
solenoid force.
For Power to Release versions, the locking arm is kept in the locked position by
spring force and unlocked by solenoid force when the solenoid is switched ON.
For Power to Lock versions, the locking arm is kept in the locked position by
solenoid force and unlocked by spring force when the solenoid is switched
OFF.
Guard lock monitoring can be deactivated with DIP switches (see
Device Configuration (using DIP switches) on page 34
).
With ACTIVE Guard Lock Monitoring:
In combination with a movable safety guard and the control system, this safety
device can prevent opening of the safety guard while a dangerous machine
movement is performed. The position of the guard locking is monitored
during this process.
Safety outputs (FO1A, FO1B) are enabled only when the locking bolt is sensed
in its extended position in the lock module AND the locking arm is in position
(for example, the guard is closed and the bolt is both extended and locked).
ATTENTION:
For use as a guard locking device in accordance with EN ISO
14119, the guard lock monitoring must be ACTIVE.
