How it Works
EUCHNER
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MGB-LxxB-PNx-xxx
User Manual
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EUCHNER MGB-LxxB-PNx-xxx User Manual

Operating Instructions
Safety System
MGB-L..B-PN.-... (PROFINET)
with Data Structure Type B
More than safety.
Operating Instructions Safety System MGB-L..B-PN.-... (PROFINET)
Contents
LEDs on interlocking/locking module 38
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Operating Instructions Safety System MGB-L..B-PN.-... (PROFINET)

Scope

This manual is valid for all MGB-PN with data structure type B from version number V3.22.0.

Correct use

MGB-L0
The safety system MGB-L0 is an electromagnetic interlocking device without guard locking.
The system comprises at least one interlocking module MGB-L0 and one handle module MGB-H...
In combination with a safety guard, this safety component prevents dangerous machine movements from being performed for as long as the safety guard is opened. A stop command is triggered if the safety guard is opened during the dangerous machine function.
For the control system, this means that
Ì starting commands which cause hazardous situations must become active only
when the safety guard is in the protective position.
MGB-L1/MGB-L2
The safety system MGB-L1 / MGB-L2 is an electromagnetic interlocking device with guard locking and guard lock monitoring.
The system comprises at least one locking module MGB-L1 / MGB-L2 and one handle module MGB-H...
In combination with a safety guard and the machine control, the MGB system pre­vents the safety guard from being opened while a dangerous machine movement is being performed.
For the control system, this means that
Ì starting commands which cause hazardous situations must become active
only when the safety guard is in protective position and the guard locking is in locked position.
Ì The locked position of the guard locking must be released only when the haz-
ardous situation is no longer present.
MGB-L0/MGB-L1/MGB-L2
The interlocking module MGB-L0B-PN.-... and locking module MGB-L1B-PN.-... / MGB-L2B-PN.-... are operated as an IO device in the PROFINET (PROFIsafe).
Before safety components are used, a risk assessment must be performed on the machine, e.g. in accordance with
Ì EN ISO 13849-1, Safety of machinery. Safety related parts of control systems.
General principles for design
Ì EN ISO 12100, Safety of machinery – Basic concepts - General principles for
design - Risk assessment and risk reduction.
Correct use includes compliance with the relevant requirements for installation and operation, in particular
Ì EN ISO 13849-1, Safety of machinery. Safety related parts of control systems.
General principles for design
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Operating Instructions Safety System MGB-L..B-PN.-... (PROFINET)
Ì EN 1088, Safety of machinery. Interlocking devices associated with guards.
Principles for design and selection
Ì EN 60204-1, Safety of machinery. Electrical equipment of machines. General
requirements.
The safety system MGB can only be combined with the intended modules in the MGB system family.
On the modification of system components, EUCHNER provides no warranty for safe function.
The customer is responsible for the safe overall function, especially for the safe integration into the PROFIsafe environment.
Important!
Ì The user is responsible for the integration of the device into a safe overall
system. For this purpose, the overall system must be validated, e.g. in ac­cordance with EN ISO 13849-2.
Ì Correct use requires observing the permissible operating parameters (see
Technical data).
Ì If a product data sheet is included with the product, the information on the
data sheet applies in case of discrepancies with the operating instructions.
Ì In the estimation of the PL for the overall system, a maximum value of
100 years can be assumed for the MTTFd according to the limit value in EN ISO 13849-1:2008, section 4.5.2. This corresponds to a minimum value for the PFHd of 2.47x10-8/h.

Exclusion of liability and warranty

In case of failure to comply with the conditions for correct use stated above, or if the safety instructions are not followed, or if any servicing is not performed as required, liability will be excluded and the warranty void.
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Operating Instructions Safety System MGB-L..B-PN.-... (PROFINET)

General safety instructions

Safety switches fulfill personal protection functions. Incorrect installation or tamper­ing can lead to fatal injuries to personnel.
Check the safe function of the safety guard particularly
Ì after any setup work Ì after the replacement of an MGB component Ì after an extended period without use Ì after every fault
Independent of these checks, the safe function of the safety guard should be checked at suitable intervals as part of the maintenance schedule.
Warning!
Loss of safety function in the event of incorrect connection or incorrect use.
Ì Safety switches must not be bypassed (bridging of contacts), turned away,
removed or otherwise rendered ineffective. On this topic pay attention in particular to the measures for reducing the pos­sibility of bypassing from EN 1088:1995+A2:2008, section 5.7.
Ì The switching operation is only allowed to be triggered by the intended han-
dle module MGB-H... that is positively fastened to the safety guard. The device is only allowed to be installed and placed in operation by authorized personnel
Ì who are familiar with the correct handling of safety components Ì who are familiar with the applicable EMC regulations Ì who are familiar with the applicable regulations on health and safety and ac-
cident prevention
Ì who have read and understood the operating instructions.
Important!
Prior to use, read the operating instructions and keep these in a safe place. Ensure the operating instructions are always available during mounting, setup and servicing. EUCHNER cannot provide any warranty in relation to the readability of the CD for the storage period required. For this reason you should archive a printed copy of the operating instructions. You can download the operating instructions from www.EUCHNER.de.
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Operating Instructions Safety System MGB-L..B-PN.-... (PROFINET)

Function

Interlocking module MGB-L0.B-PN.

Together with a handle module, the interlocking module makes it possible to inter­lock movable safety guards. The combination also serves as a mechanical door stop at the same time.
The following switch-on condition applies to safety bit SI1.0 ( see also System status table and section PROFIsafe data bytes):
Ì Safety guard closed (T) Ì Bolt tongue inserted into interlocking module (R)
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.

Locking modules MGB-L1.B-PN. and MGB-L2.B-PN.

Important!
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.
To operate the device as a guard lock according to EN 1088, the signals for door position (T=PROFIsafe bit SI0.2), bolt position (R= PPOFIsafe 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 (safety bit SI1.0). As an alternative, you can also link the bits SI0.2 to SI0.4 individually to your control system.
The following switch-on condition applies to safety bit SI1.1 ( see also System status table and section PROFIsafe data bytes):
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.
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Operating Instructions Safety System MGB-L..B-PN.-... (PROFINET)
Version MGB-L1B-...
The locking arm is kept in locked position by spring force and is unlocked by solenoid force (closed-circuit current principle).
Version MGB-L2B-...
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).
Warning!
Ì The safety guard can be opened immediately in the event of interruption of
the solenoid power supply!
Ì Usage only in special cases after strict evaluation of the accident risk (see
EN 1088:1995+A2:2008, section 5.5)! Typical case: If the risk of accidental locking inside a safety guard during a power failure is higher than the risk of ineffective guard locking.

Control of the guard locking

Important!
Important!
From MGB version V2.36.4, the factory ensures that control is possible only from the safe control area. Here, it was determined in the firmware that only bit SO 0.0 is evaluated.
By changing the parameters in the configuration tool of your control system, it can be set that bit O 0.0 (in the safe data block for the MGB evaluation module) is evaluated as well (see description of the data blocks on page 30).
Control of the guard locking via the safe control area does not provide increased safety, as the device-internal control of the guard locking is only of single-channel design.
The following functions depend on the MGB version, the version of the GSD file and the settings made there. Compare the specified versions with those on your device and your GSD file. The version number of your MGB can be found on the type plate (format: V X.XX.X).
MGB version GSD version Continue in section ...
up to and including V 2.35.4
from V 2.36.4
..._110026-20110725 ..._110026-20110815 ..._110026-20110725 ..._110026-20110815
Case A Case A Case B Case C
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Operating Instructions Safety System MGB-L..B-PN.-... (PROFINET)
Case A
You have an MGB with a version number of V 2.35.4 and a GSD file with a version number of ..._110026-20110725 or older. Or you have an MGB with a version num­ber of V 2.35.4 and a GSD file with a version number from ..._110026-20110815.
The guard locking solenoid is controlled if
Ì bit O 0.0 OR bit SO 0.0 = 1
Truth table:
PROFINET bit PROFIsafe bit Guard locking with
O 0.0 SO 0.0 MGB-L1... MGB-L2...
0 0 active inactive 0 1 inactive active 1 0 inactive active 1 1 inactive active
What must be observed?
The guard locking can be controlled from the unsafe control area. The combination with the more up-to-date GSD file allows a parameter to specify which bits are to be used for control. However, the device does not support this function. In other words, the setting in your configuration software remains ineffective.
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Operating Instructions Safety System MGB-L..B-PN.-... (PROFINET)
Case B
You have an MGB with a version number of V 2.36.4 and a GSD file with a version number of ..._110026-20110725 or older.
The guard locking solenoid is controlled if for MGB-L1...
Ì bit SO 0.0 = 1
for MGB-L2...
Ì bit O 0.0 OR bit SO 0.0 = 1
Truth table:
PROFINET bit PROFIsafe bit Guard locking with
O 0.0 SO 0.0 MGB-L1... MGB-L2...
0 0 active inactive 0 1 inactive active 1 0 active active 1 1 inactive active
What must be observed?
Bit O 0.0 does not have any function with version MGB-L1.... In existing installations
in which old devices are replaced with new ones (e.g. due to defect), malfunctions can occur if control via bit O 0.0 was programmed in the PLC.
Remedy:
1. Replace the old GSD file with a version from ..._110026-20110815.
2. In the parameter Locking module – solenoid control, activate unsafe control of the guard locking solenoid via bit O 0.0.
3. Set bit SO 0.0 permanently to the value 1.
¨ The guard locking solenoid is controlled exclusively via bit O 0.0
or
Ì change the control bit from O 0.0 to SO 0.0 in your PLC program.
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Operating Instructions Safety System MGB-L..B-PN.-... (PROFINET)
Case C
You have an MGB with a version number of V 2.36.4 and a GSD file with a version number from ..._110026-20110815.
The guard locking solenoid is controlled if:
Ì bit SO 0.0 = 1 (factory setting)
Truth table:
PROFINET bit PROFIsafe bit Guard locking with
O 0.0
not relevant
0 0 active inactive 0 1 inactive active 1 0 active inactive 1 1 inactive active
What must be observed? You can define in the GSD file whether bit O 0.0 may be used for control in addition
to bit SO 0.0. The setting is specified in the parameter Locking module – solenoid control.
SO 0.0 MGB-L1... MGB-L2...
If O 0.0 is additionally used, the guard locking solenoid is controlled if for MGB-L1...
Ì bit SO 0.0 AND bit O 0.0 = 1 Ì for MGB-L2... bit SO 0.0 OR bit O 0.0 = 1
Truth table:
PROFINET bit PROFIsafe bit Guard locking with
O 0.0 SO 0.0 MGB-L1... MGB-L2...
0 0 active inactive 0 1 active active 1 0 active active 1 1 inactive active
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Operating Instructions Safety System MGB-L..B-PN.-... (PROFINET)

System overview

Mounting plate
Escape release (optional) (MGB-E...)
Handle module (MGB-H...)
Evaluation module (MGB-L...)
Bus module (Profinet) (MGB-B...)
Key:
1
LED indicator
2
Power supply
3
PROFINET connection
Note: Depending on the version, additional controls and indicators may be integrated into the cover. See enclosed data sheet.
Figure 1: Components at a glance
Note: MGB-PN systems are completely factory configured. The configura­tion must not be changed subsequently. The illustrations in this section can deviate from your system and serve only as examples. The configuration of your MGB system can be found in the data sheet included with every MGB system.

Bus module MGB-B-...-PN

1
2
3
Figure 2: Bus module MGB-B-...-PN (configuration example)
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Operating Instructions Safety System MGB-L..B-PN.-... (PROFINET)

Evaluation module MGB-L.-

Key:
1
LED indicator
2
Cover for mechanical release
3
Locking arm (only version with
guard locking)
4
Auxiliary marking for max. permit-
ted mounting distance
Note: Depending on the version, additional controls and indicators may be inte­grated into the cover. See enclosed data sheet.
Key:
1
Door handle
2
Locking pins for housing cover
and handle adjustment
3
Lockout mechanism
4
Bolt tongue
Note: Depending on the function, the handle can feature additional functions (second lockout mechanism, differ­ent handle, etc.). See enclosed data sheet.
1
2
3
4
Figure 3: Evaluation module MGB-L.-

Handle module MGB-H-...

1
2
3
4
Figure 4: Handle module MGB-H-...
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Operating Instructions Safety System MGB-L..B-PN.-... (PROFINET)
1 2 3 4 5

Escape release MGB-E-... (optional)

Key:
1
Door handle
2
Setscrew
3
Cover
4
Actuation axis, length 118 mm (in-
cluded) Alternatively: Long actuation axis, length 250 mm (order No. 106 761)
5
Protective sleeve
Note: Depending on the version, a mounting plate can be included. See enclosed data sheet.
Figure 5: Escape release MGB-E-...

Dimension drawing

See enclosed data sheet
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Operating Instructions Safety System MGB-L..B-PN.-... (PROFINET)

Mechanical release

In the event of service, the guard locking can be released with the mechanical release irrespective of the state of the solenoid (see Figure 6).
The locking screw must be screwed back in and sealed after use (for example with sealing lacquer). Tightening torque 0.5 Nm.
1. Undo locking screw.
2. Lift locking arm using a screwdriver and actuate door handle.
Important!
The system enters into a latching fault when the mechanical release is actuated. See “System status table LEDs on interlocking/locking module” on page 38, state Signal sequence erroneous (DIA1 flashes 7 times).
Note:
The system might not enter into a latching fault if the mechanical release is actu­ated very slowly.
Figure 6: Mechanical release
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