Operating Instructions Safety Systems
MGB-L..B-PN.-… (PROFINET) and With Expanded Data Structure Type C
8
(translation of the original operating instructions) 2123622-04-06/19
5. Function
5.1.
Locking module MGB-L2.B-PN.
Together with a handle module, the locking module makes it possible to lock movable safety guards. The combination also
serves as a mechanical door stop at the same time.
Important!
To operate the device as a guard lock according to EN ISO 14119, the signals for door position
(T=PROFIsafe bit
SI0.2
), bolt position (R= PROFIsafe bit
SI0.3
) and guard lock monitoring (Z=
PROFIsafe bit
SI0.4
) must be polled in a logical AND operator. This operator is already implemented
in the PROFIsafe data block (ÜK=safety bit
SI1.1
).
As an alternative, you can also link the bits
SI0.2
to
SI0.4
individually in your control system.
The following switch-on condition applies to safety bit
SI1.1
(see also chapter
15. System status table on page 38
and
chapter
13.9. PROFIsafe data bytes (data block for safe functions) on page 31
Ì
Safety guard closed (T)
Ì
Bolt tongue inserted into locking module (R)
Ì
Locking arm in locking position (guard lock monitoring) (Z)
The locking module detects the position of the safety guard and the position of the bolt tongue. The position of the locking
arm is also monitored.
The bolt tongue in the handle module is moved into and out of the locking module by actuating the door handle.
When the bolt tongue is fully inserted in the locking module, the locking arm locks the bolt tongue in this position. Depending
on the version, this locking is by spring force or solenoid force.
5.2.
Guard locking for version MGB-L2
(guard locking actuated by energy ON and released by spring force)
Important!
Use as guard locking for personnel protection is possible only in special cases, after strict assessment
of the accident risk (see EN ISO 14119:2013, section 5.7.1)!
The magnetically actuated guard locking operates in accordance with the open-circuit current principle. If voltage is inter-
rupted at the solenoid, guard locking is released and the safety guard can be opened directly!
The safety guard can be opened as long as no voltage is present at the guard locking solenoid.
If voltage is present at the guard locking solenoid, the locking arm is held in extended position and the safety guard is locked.
