• Mechanical release
• Connection using cable entry, M12 x 1.5 or plug connector
• Plug connector connection, either RC18 or M12 12-pin
• Operation of guard locking via IMP as control input on PLC (only 3 mA)
• Monitoring outputs
• OD = ON when the door is closed.
• OT = Bolt tongue inserted in the evaluation module (in case of guard locking ready for operation of the solenoid. In case of interlocking corresponds to safety outputs)
• OL = Guard locking solenoid locked in position (in case of guard locking corresponds to safety outputs)
• OI = Diagnostics, there is a fault

Economical wiring according to standards

All devices in the family AR can be wired directly in series in a so-called AR series connection without reducing safety or the PL. As a consequence evaluation units are saved. AR devices are also available in the EUCHNER series CES and CET.

Interlocking or guard locking? Functions of the versions MGB-L0, MGB-L1 and MGB-L2 compared

Interlocking (MGB-L0, without guard locking)

Together with a handle module, the interlocking module makes it possible to interlock the control of movable safety guards. The combination also serves as a mechanical door stop at the same time.

The following switch-on condition applies to the safety outputs OA and OB:

• Safety guard closed (but can be opened at any time)
• Bolt tongue inserted in the interlocking module

The interlocking module detects the position of the safety guard and the position of the bolt tongue. The bolt tongue in the handle module is moved into and out of the interlocking module by actuating the door handle.

Guard locking (MGB-L1 and MGB-L2)

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.

The following switch-on condition applies to the safety outputs OA and OB:

• Safety guard closed
• Bolt tongue inserted in the locking module
• Locking arm in locking position (the door cannot be opened)

The locking module detects the position of the safety guard and the position of the bolt tongue. The position of the guard locking 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.

• Version MGB-L1: The locking arm is kept in locked position by spring force and is unlocked by solenoid force (closed-circuit current principle, mechanically locked).
• Version MGB-L2: The locking arm is kept in locked position by solenoid force and unlocked by spring force when the solenoid is switched off (open-circuit current principle, electrically locked).

Connection to evaluation units or safe control systems

The safety system MGB can be connected to almost any safe evaluation unit or to any safe control system. For this purpose the short circuit monitoring on the control system is disabled – this function is performed by the MGB. Performance Level e is of course retained.