EUCHNER MGB-AR Series User guide

More than safety.
System Manual
Safety System MGB-AR
in combination
with a locking module
MGB-L1-AR-.../MGB-L2-AR-...

System Manual Safety System MGB-AR in Combination with a Locking Module
2
Contents
Correct Use 3
Exclusion of Liability and Warranty 4
General Safety Instructions 4
Function 5
System overview 6
Locking module MGB-L1-AR-.../MGB-L2-AR-... 6
Handle module MGB-H-... 6
Escape release MGB-E-... (optional) 6
Dimension drawing 7
Mechanical release 8
Lockout mechanism 9
Escape release (optional) 9
Installation 11
Changing Actuating Direction for Doors Hinged on the Left 12
Protection Against Environmental Effects 13
Electrical Connection 14
Safety in case of faults 15
Fuse protection for power supply 15
Requirements for connection cables 15
Notes on cable laying 16
Pin assignment and contact description 17
Operation as separate device 18
Operation in a CES-AR switch chain 19
Information on operation in a CES-AR switch chain 20
Setup 21
Teach-in operation 21
System Status Table 23
Technical Data 24
Typical system times 25
Troubleshooting 26
Latching fault when actuating the escape release 26
Fault reset 26
Inspection and Service 27
Declaration of Conformity 28

System Manual Safety System MGB-AR in Combination with a Locking Module
3
Correct Use
The safety system MGB is an electromagnetic interlock device with guard lock-
ing.
The system comprises at least one locking module MGB-L1-AR-.../MGB-L2-AR-...
and one handle module MGB-H...
The locking module MGB-L1-AR-.../MGB-L2-AR-... can be integrated into a switch
chain for the safety system CES-AR or operated as a separate system.
In combination with a separating safety guard and the machine control, this safety
component prevents the safety guard from being opened while a dangerous machine
movement is being performed.
For the control system, this means that
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.
The locked position of the guard locking must be released only when the haz-
ardous situation is no longer present.
Before safety components are used, a risk assessment must be performed on the
machine in accordance with
EN ISO 13849-1, Safety of machinery. Safety related parts of control systems.
General principles for design, Annex B
EN ISO 14121, Safety of machinery. Risk assessment. Principles.
Correct use includes compliance with the relevant requirements for installation
and operation, in particular
EN ISO 13489-1, Safety of machinery. Safety related parts of control systems.
General principles for design
EN 1088, Safety of machinery. Interlocking devices associated with guards.
Principles for design and selection
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.
Connection of several devices in a CES-AR switch chain is permitted only using
devices intended for series connection with the CES-AR. Please check this in the
operating instructions of the respective device. For detailed information on opera-
tion in a CES-AR switch chain, please see the related CES-AR system manual.
Important!
The user is responsible for safe integration of the device in a safe overall
system. For this purpose the overall system must be validated, e.g. in accor-
dance with EN ISO 13849-2.
The permissible operating parameters must be observed for correct use
(see Technical data).
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.

System Manual Safety System MGB-AR in Combination with a Locking Module
4
Important!
In the estimation of the PL for the overall system, a maximum value of
100 years can be assumed for the MTTFdaccording to the limit value in
EN ISO 13849-1:2008, Section 4.5.2. This corresponds to a minimum value
for the PFHdof 2.47 x 10-8/h.
When up to 10 devices are connected in series, these limit values can be
assumed for the entire switch chain as a subsystem. As a subsystem, this
switch chain achieves PL e.
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.
General Safety Instructions
Safety switches fulfill personal protection functions. Incorrect installation or tamper-
ing can lead to fatal injuries to personnel.
Check the safe function of the safety guard particularly
after any setup work
after the replacement of an MGB component
after an extended period without use
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.
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 pos-
sibility of bypassing from EN 1088:1995+A2:2008, section 5.7.
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
who are familiar with the correct handling of safety components
who are familiar with the applicable EMC regulations
who are familiar with the applicable regulations on health and safety
who have read and understood the operating instructions and the system
manual

System Manual Safety System MGB-AR in Combination with a Locking Module
5
Important!
Prior to use read the operating instructions and the system manual, and keep
these in a safe place. Ensure the operating instructions and the system manual
are always available during mounting, setup and servicing. EUCHNER cannot
provide any warranty in relation to the readability of the CD for the storage pe-
riod required. For this reason you should archive a printed copy of the system
manual. If you should lose the operating instructions or the system manual, you
can download these documents from www.EUCHNER.de.
Function
Together with a handle module, the locking module makes it possible to lock
moveable safety guards. The combination also serves as a mechanical door stop
at the same time.
The following switch-on condition applies for the safety outputs OAand OB(see
also System status table):
Safety guard closed
Bolt tongue inserted in the locking module
Locking arm in locking position
Both safety inputs (IA and IB) must be on
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 retracted and extended 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-AR-...
The locking arm is held in the locked position by spring force and is unlocked by
solenoid force (closed-circuit current principle).
Version MGB-L2-AR-...
The locking arm is held in the locked position by solenoid force and is unlocked by
spring force when the solenoid is switched off (open-circuit current principle).
Warning!
The safety guard can be opened immediately in the event of interruption of
the solenoid power supply!
Usage only in special cases in accordance with strict evaluation of the acci-
dent 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.

System Manual Safety System MGB-AR in Combination with a Locking Module
6
System overview
Locking module MGB-L1-AR-.../MGB-L2-AR-...
Figure 1: Locking module MGB-L1-AR-.../MGB-L2-AR-...
Handle module MGB-H-...
Figure 2: Handle module MGB-H-...
Escape release MGB-E-... (optional)
Figure 3: Escape release MGB-E-...
1
2
4
5
3
6
Key:
1Cover for mechanical release
2LED indicator
3Terminals X2 -X5
4Locking arm
5Auxiliary marking for maximum per-
mitted mounting distance
6Depending on version:
Cable entry M20x1.5 or plug con-
nector
Note:
Depending on the version, additional
controls and indicators may be integrated
into the cover and a mounting plate can
be included. See enclosed data sheet.
1
2
3
4
Key:
1Door handle
2Locking pins for housing cover
and handle adjustment
3Lockout bar
4Bolt tongue
Note:
Depending on the version, a mounting
plate can be included. See enclosed
data sheet.
1 2 3 4 5
Key:
1Door handle
2Setscrew
3Cover
4Actuation axis 8 x 8 mm
5Protective sleeve
Note:
Depending on the version, a mounting
plate can be included. See enclosed data
sheet.

System Manual Safety System MGB-AR in Combination with a Locking Module
7
Dimension drawing
Figure 4: Dimension drawing, MGB fitted without optionial mounting plates
y
x
z
5172
114
40
40 93
113,5 110
M20x1,5 (4x)
19,2
289,3
AUF
OPEN
CLOSED
ZU
40
130
15
111
40
4
155,3
40
10 58,5
110
8 x 8
7,5
6 ,5
86,5
15,4
15
73,5
6,3
6,2
89,4
24
5
10
46
10
8 9 ,4
7 7 ,5
9 2 ,5
16,5

System Manual Safety System MGB-AR in Combination with a Locking Module
8
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 5).
The locking screw must be screwed back in and sealed after use (for example with
sealing lacquer). Tightening torque 0.5 Nm.
Undo locking screws.
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 on page 23, state signal sequence erroneous (DIA1
flashes six times).
Note!
The system might not enter into a latching fault if the mechanical release is actu-
ated very slowly.
Figure 5: Mechanical release
1.
2.

System Manual Safety System MGB-AR in Combination with a Locking Module
9
Lockout mechanism
If the lockout bar is pivoted out, the bolt tongue cannot be extended. The lockout
bar can be secured with padlocks (see Figure 6)
To pivot out, press the grooved part (only possible with bolt tongue retracted).
Figure 6: Lockout bar secured with padlock
Escape release (optional)
The escape release is used to open a locked safety guard from the inside without
tools.
Warning!
Loss of the safety function due to incorrect mounting of the escape release.
The actuation axis for the escape release must be inserted min. 10 mm into
the handle module.
In case of profile widths larger than 40 mm and on the usage of mounting
plates use 250 mm actuation axis (order no. 106 761) and cut to length.
In case of profile widths smaller than 40 mm, cut actuation axis and protective
sleeve to length.
Align escape release axis at right angles to the handle module. See Figures 4
and 8.
Install escape release so that operation as well as inspection and maintenance
are possible.
Important!
The system enters into a latching fault when the escape release is actuated.
See system status table on page 23, state signal sequence erroneous (DIA1
flashes six times).
Note!
The system might not enter into a latching fault if the escape release is actuated
very slowly.
Key:
1Padlock ∅min. 2 mm, ∅max. 10
mm
Note:
You can fit a maximum of 3 locks Ø 8
mm.
1
Order No. 100464 Order No. 111157

System Manual Safety System MGB-AR in Combination with a Locking Module
10
Preparing the escape release
1Fit door handle
2Insert actuation axis. The locking ring A must be in contact with
the escape release B.
3Tighten setscrew to 2 Nm
4Fit protective sleeve
Figure 7: Preparing the escape release
1
324
A
B
Protective sleeve
Actuation axis
Example with mounting plates:
58,5
4
D
4
(10)
55,5
(+ 4 mm per plate)
250
182
Mounting plates
D + 13,5
3,5
(+ 4 mm per plate)
D + 3

System Manual Safety System MGB-AR in Combination with a Locking Module
11
Installation
Warning!
Mounting must be performed only by authorized personnel.
For installation steps see Figure 8 and Figure 9 to 14.
Install system so that
operation of the mechanical release as well as inspection and maintenance are
possible.
Figure 8: Installation example for door hinged on the right (general view)
4x M6
2x M6
0,5 Nm
1 Nm (6x)
Fastening material not included!
Cut-out for escape release
Tightening torque 4 Nm

System Manual Safety System MGB-AR in Combination with a Locking Module
12
Changing Actuating Direction for Doors Hinged on the Left
Important!
It is only possible to make this change when the bolt tongue is not extended and
an escape release is not yet mounted.
As supplied, the handle module is set for doors hinged on the right.
The safety guard opens by pressing down the door handle.
The system is mounted the other way up for doors hinged on the left.
The safety guard opens by pressing up the door handle (see Figure 9).
For this reason the actuating direction of the door handle must be changed (see
Figure 9 - 14).
CLOSED
OPEN
1
3
2
4
5
4Lift locking pin on the door handle using a screwdriver and
hold in this position.
5Turn door handle to right.
1Push door handle upwards.
2Unscrew locking pins to the marking
3Push cover to the side.
7
a
6
b
4 mm
8
6Only on the usage of an escape release: Turn joint with hex
screw counter-clockwise from position (a) to position (b).
7Close cover.
8Screw in locking pins and tighten to 2 Nm.
Figure 9: Changing actuating direction, step 1Figure 10: Changing actuating direction, step 2and 3
Figure 11: Changing actuating direction, step 4and 5Figure 12: Changing actuating direction, step 6to 8

System Manual Safety System MGB-AR in Combination with a Locking Module
13
3 mm
9
10
OPEN
CLOSED
9Undo setscrew.
AT Move door handle 90° clockwise and fasten
again.
Tighten setscrew to 2 Nm AK State after the change
Fig. 13: Changing actuating direction, step 9and AT Figure 14: Changing actuating direction, final state
Protection Against Environmental Effects
Lasting and correct safety function requires that the system must be protected
against foreign bodies such as swarf, sand, blasting shot, etc. which can become
lodged in the locking and handle modules. For this purpose a suitable installation
position should be selected.
Cover device during painting work!

System Manual Safety System MGB-AR in Combination with a Locking Module
14
Electrical Connection
Warning!
In case of an error, loss of the safety function through incorrect connection.
To ensure safety, both safety outputs (OA and OB) must always be evaluated.
The monitoring outputs O1 ... O4 must not be used as safety outputs.
Lay the connection cables with protection to prevent the risk of short cir-
cuits.
Caution!
Risk of damage to equipment or malfunctions as a result of incorrect connec-
tion.
Do not use a control system with pulsing or switch off the pulsing function in
your control system. The device generates its own clock signal on the output
lines OA/OB. A downstream control system must tolerate these test pulses,
which may have a length of up to 1 ms.
The pulses are also present when the safety outputs are switched off. De-
pending on the inertia of the connected device (control system, relay, etc.),
this can lead to short switching processes.
The inputs on an evaluation unit connected must be positive-switching, as the
two outputs on the safety switch deliver a level of +24 V in the switched-on
state.
All the electrical connections must either be isolated from the mains supply
by a safety transformer according to EN IEC 61558-2-6 with limited output
voltage in the event of a fault, or by other equivalent isolation measures.
For use and operation as per the requirements, a power supply with the
feature "for use in class 2 circuits" must be used. The same requirement ap-
plies to the safety outputs.
Alternative solutions must comply with the following requirements:
a) Electrically isolated power supply unit with a max. open-circuit voltage of 30
V/DC and a limited current of max. 8 A.
b) Electrically isolated power supply unit in combination with fuse as per UL248.
This fuse should be designed for max. 3.3 A and should be integrated into
the 30 V/DC voltage section.
All electrical outputs must have an adequate protective circuit for inductive
loads. The outputs must be protected with a free-wheeling diode for this pur-
pose.
Power devices which are a powerful source of interference must be installed
in a separate location away from the input and output circuits for signal pro-
cessing. The cable routing for safety circuits should be as far away as pos-
sible from the cables of the power circuits.
To prevent EMC problems, it is imperative you follow section Notes on cable
laying, page 16.
Important!
If the device does not appear to function when operating voltage is applied
(e.g. green DIA LED does not flash), the safety switch must be returned uno-
pened to the manufacturer.
To ensure the stated degree of protection IP67 is achieved, the cover
screws must be tightened to a tightening torque of 1 Nm.
Tighten screw for the cover for the mechanical release to 0.5 Nm.

System Manual Safety System MGB-AR in Combination with a Locking Module
15
Safety in case of faults
The operating voltage UBis reverse polarity protected.
The contacts IA/IBand OA/OBare short circuit-proof
A short-circuit between IAand IBor OAand OBis detected by the switch.
A short circuit in the cable can be excluded by laying the cable with protection.
Fuse protection for power supply
The power supply must be provided with fuse protection depending on the number
of devices and current required for the outputs. The following rules apply here:
Max. current consumption of an individual device Imax
Imax = IUB + IUA + IOA+OB
IUB = Device operating current (80 mA)
IUA = Load current of monitoring outputs O1 ... O4 (4 x max. 200 mA) + sole-
noid + control elements
IOA+OB = Load current of safety outputs OA + OB (2 x max. 200 mA)
Max. current consumption of a switch chain ΣImax
ΣImax = IOA+OB + n x (IUB + IUA)
n = Number of devices connected
Assignment of the currents to the fuse circuits
Current Fuse circuit F1 Fuse circuit F2
IUB 80 mA
IOA+OB (2 x max. 200 mA)
IUA
ISolenoid = 350 mA
IO1...O4 = (4 x max. 200 mA)
IControl elements = max. 20 mA
Requirements for connection cables
Caution!
Risk of damage to equipment or malfunctions as a result of unsuitable connec-
tion cables.
On the usage of other connection components, the requirements in the fol-
lowing table apply. EUCHNER provides no warranty for safe function in case
of failure to comply with these requirements.
Observe the following requirements for the connection cables:
Parameter Value Unit
Wire cross-section min. 0,13 mm²
R max. 60 W/km
C max. 120 nF/km
L max. 0,65 mH/km

System Manual Safety System MGB-AR in Combination with a Locking Module
16
Notes on cable laying
Lay all MGB connection cables in a common cable harness.
Important: lay cables in a common harness
Figure 15: Stipulate cable laying
PLC
+ 24 V DC
cabinet
0 V
MGB-L.-AR...
IA/IBOA/OB
UB0V UA0V

System Manual Safety System MGB-AR in Combination with a Locking Module
17
Pin assignment and contact description
Figure 16: Connections and LEDs
Terminal Designation Description
X3.1 to X3.3 - See the enclosed data sheet
X3.4 UAPower supply for the interlocking solenoid and the monitoring out-
puts, DC 24 V, must be present continuously so that the interlocking
solenoid functions.
X3.5 and X3.6 0VMGround for the power supply to the interlocking solenoid, DC 0 V (con-
nected internally to X5.5).
X3.7 UCM Control voltage for switching on and off the guard locking, DC 24 V.
X4.1 IAEnable input for channel A, connect to DC 24 V in separate opera-
tion. In case of switch chains, connect output signal OAfrom previous
device.
X4.2 IBEnable input for channel B, connect to DC 24 V in separate opera-
tion. In case of switch chains, connect output signal OBfrom previous
device.
X4.3 - Not used
X4.4 OASafety output channel A,
ON when door is closed and guard locked.
X4.5 OBSafety output channel B,
ON when door is closed and guard locked.
X4.6 RST Reset input, device is reset if DC 24 V are applied to RST for at least
3 s.
X5.1 O1 Door monitoring output,
ON when the door is closed.
X5.2 O2 Bolt tongue monitoring output,
ON when the door is closed and the bolt tongue is inserted in the
locking module.
X5.3 O3 Guard locking monitoring output,
ON when the door is closed and guard locked.
X5.4 O4 Monitoring output DIA2,
ON when the device is in the fault state.
X5.5 0V Ground for power supply, DC 0 V
(connected internally to X3.5 and X3.6).
X5.6 UBPower supply, DC 24 V
X2.1 to X2.7 - See the enclosed data sheet
Table 1: Pin assignment and contact description
42 6
35
1
1
1
42 6
35
1
2345
X3
X4 X5
X2
LED
DIA 1
Power
DIA 2
State
gn
gn
rd
ye
7 6 2345 7 6

System Manual Safety System MGB-AR in Combination with a Locking Module
18
Operation as separate device
Figure 17: Connection example for separate operation
The switches can be reset via the RST input. To do this, a voltage of 24 V is ap-
plied to the RST input for at least 3 seconds. The supply voltage to the switches
is interrupted during this time. The RST input must be connected to 0 V if it is not
used.
24V
GND
-F1
X5.6UB
X5.50V
X5.4OUT4
X5.3OUT3
X5.2OUT2
X5.1OUT1
X4.6RST
MGBL
X4.5OB
X4.4OA
X4.3---
X4.2IB
X4.1IA
Entriegeln/
Unlock
X3.7UCM
X3.60VM
X3.50VM
-F2
X3.4UA
A1
24V DC
A1
A2
S11
S10
ESM-BA3xx
S13
EUCHNER
Start
KA
KB
S21 S12
K1
+
S14
K2
+
13
14
KA
A1
A2
23
24
KB
A1
A2
33
34
41
42

System Manual Safety System MGB-AR in Combination with a Locking Module
19
Operation in a CES-AR switch chain
Figure 18: Connection examples for operation in a CES-AR switch chain
For detailed information on operation in a CES-AR switch chain, see the related
CES-AR system manual. The locking module MGB-L1-AR-.../MGB-L2-AR-... behaves
in the switch chain in practice like a safety switch CES-AR. The differences to the
CES-AR are described in the following.
GND
DC 24 V
A1
24VDC
F1
A1
A2
S11
S10
ESM-BA3xx
S13
EUCHNER
S21 S12
K1
+
UBX5.6
0VX5.5
O4X5.4
S14
K2
+
O3X5.3
O2X5.2
O1X5.1
F5
13
14
K5
RSTX4.6
OBX4.5
MGB-L1-AR... #3
OAX4.4
F6
23
24
K6
NCX4.3
IBX4.2
IAX4.1
33
34
UCMX3.7
NCX3.6
41
42
0VMX3.5
F2
UAX3.4
UBX5.6
0VX5.5
O4X5.4
O3X5.3
O2X5.2
O1X5.1
RSTX4.6
OBX4.5
MGB-L1-AR... #2
OAX4.4
NCX4.3
IBX4.2
IAX4.1
UCMX3.7
NCX3.6
0VMX3.5
-F3
ACHTUNG: Rückführkreis muss entsprechend Risikobeurteilung eingebunden werden.
UAX3.4
UBX5.6
0VX5.5
O4X5.4
O3X5.3
O2X5.2
O1X5.1
RSTX4.6
OBX4.5
MGB-L1-AR... #1
OAX4.4
NCX4.3
IBX4.2
IAX4.1
UCMX3.7
NCX3.6
0VMX3.5
F4
UAX3.4
ATTENTION: Feedback loop must be integrated according to risk assessment.

System Manual Safety System MGB-AR in Combination with a Locking Module
20
Information on operation in a CES-AR switch chain
System times
The locking module has longer response times than a CES-AR switch (see Technical
data and diagram of Typical system times, Figure 20 and 21).
Position in a CES-AR switch chain
The locking module must be the last device in the CES-AR switch chain (see Figure
19).
Important: lay cables in a common harness
Figure 19: Position in a CES-AR switch chain
Output current
The safety outputs on the guard locking module have a lower maximum output
current than a CES-AR switch (see Technical data).
Number of devices in the switch chains
In a pure MGB switch chain a maximum of ten devices can be connected in series.
In mixed switch chains (e. g. together with CES-AR) the maximum number of devices
is also reduced to ten.
CES-AR
terminating plug
CES-AR
CES-AR
PLC
MGB-L.-AR...
+ 24 V DC
cabinet
0 V
IA/IB
IA/IB
OA/OB
OA/OB
IA/IB
IA/IBOA/OB
UB0V UA0V
OA/OB
#1
#2
#3
#4 MGB-L.-AR...
IA/IBOA/OB
UB0V UA0V
#5
This manual suits for next models
2
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