EUCHNER SGA Serie Mode D'emploi page 4

Operating Instructions
Safety Switch SGA...
Correct use
Safety switches series SGA are interlocking devic-
es without guard locking (separate actuator). The
actuator has a low coding level. In combination with
a movable safety guard and the machine control,
this safety component prevents dangerous machine
functions from occurring while the safety guard is
open. A stop command is triggered if the safety
guard is opened during the dangerous machine
function.
This means:
Starting commands that cause a dangerous ma-
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chine function must become active only when the
safety guard is closed.
Opening the safety guard triggers a stop com-
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mand.
Closing a safety guard must not cause automatic
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starting of a dangerous machine function. A
separate start command must be issued. For
exceptions, refer to EN ISO 12100 or relevant
C-standards.
Before the device is used, a risk assessment must
be performed on the machine, e.g. in accordance
with the following standards:
EN ISO 13849-1, Safety of machinery – Safety-re-
f
lated parts of control systems – Part 1: General
principles for design
EN ISO 12100, Safety of machinery – General
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principles for design – Risk assessment and risk
reduction
IEC 62061, Safety of machinery – Functional
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safety of safety-related electrical, electronic and
programmable electronic control systems
Correct use includes observing the relevant require-
ments for installation and operation, particularly
based on the following standards:
EN ISO 13849-1, Safety of machinery – Safety-re-
f
lated parts of control systems – Part 1: General
principles for design
EN ISO 14119 (supersedes EN 1088), Safety of
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machinery – Interlocking devices associated with
guards – Principles for design and selection
EN 60204-1, Safety of machinery – Electrical
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equipment of machines – Part 1: General re-
quirements
Important!
The user is responsible for the proper integration
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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.
If the simplified method according to section 6.3
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of EN ISO 13849-1:2008 is used for determining
the Performance Level (PL), the PL might be re-
duced if several devices are connected in series.
Logical series connection of safe contacts is
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possible up to PL d in certain circumstances.
More information about this is available in
ISO TR 24119.
If a product data sheet is included with the prod-
f
uct, the information on the data sheet applies
in case of discrepancies with the operating
instructions.
Safety precautions
WARNING
Danger to life due to improper installation or due
to bypassing (tampering). Safety components
perform a personal protection function.
Safety components must not be bypassed,
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turned away, removed or otherwise rendered
ineffective. On this topic pay attention in partic-
ular to the measures for reducing the possibility
of bypassing according to EN ISO 14119:2013,
section 7.
The switching operation must be triggered only
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by actuators designated for this purpose.
Prevent bypassing by means of replacement
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actuators. For this purpose, restrict access to
actuators and to keys for releases, for example.
Mounting, electrical connection and setup only
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by authorized personnel possessing special
knowledge about handling safety components.
Function
The safety switch monitors the position of movable
safety guards. The switching contacts are actuated
on the insertion/removal of the actuator.
Switching states
The detailed switching states for your switch can be
found in Figure 2. All available switching elements
are described there.
Safety guard open
The safety contacts are open.
Safety guard closed
The safety contacts are closed.
Selection of the actuator
NOTICE
Damage to the device due to unsuitable actuator.
Make sure to select the correct actuator (see
table in Figure 3).
Additionally pay attention to the door radius and
the fastening options (see Figure 4).
The following versions are available:
Actuator S for safety switches without insertion
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funnel.
Actuator L for safety switches with insertion funnel.
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Mounting
NOTICE
Device damage due to improper mounting and
unsuitable ambient conditions.
Safety switches and actuators must not be used
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as an end stop.
Observe EN ISO 14119:2013, sections 5.2 and
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5.3, for information about fastening the safety
switch and the actuator.
Observe EN ISO 14119:2013, section 7, for
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information about reducing the possibilities for
bypassing an interlocking device.
Protect the switch head against damage as well
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as penetrating foreign objects such as swarf,
sand and blasting shot, etc.
Changing the actuating direction
Figure 1: Changing the actuating direction
1. Remove the screws from the actuating head.
2. Set the required direction.
3. Tighten the screws with a torque of 0.8 Nm.
4. Cover the unused actuating slot with the en-
closed slot cover.
4
Electrical connection
WARNING
Loss of the safety function due to incorrect
connection.
Use only safe contacts (
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Use of the safety switch an interlocking
device for personnel protection
At least one contact
the guard locking state (for terminal assignment,
see Figure 2).
The following information applies to devices
with plug connector:
Check that the plug connector is sealed.
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The following information applies to devices
with cable entry:
1. Use a suitable tool to open the desired inser-
tion opening.
2. Fit the cable gland with the appropriate degree
of protection.
3. Connect and tighten the terminals with 0.5 Nm
(for terminal assignment, see Figure 2).
4. Check that the cable entry is sealed.
5. Close the switch cover and screw in place
(tightening torque 0.8 Nm).
Function test
WARNING
Fatal injury due to faults during the function test.
Before carrying out the function test, make sure
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that there are no persons in the danger area.
Observe the valid accident prevention regula-
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tions.
Check the device for correct function after installa-
tion and after every fault.
Proceed as follows:
Mechanical function test
The actuator must slide easily into the actuating
head. Close the safety guard several times to check
the function.
Electrical function test
1. Switch on operating voltage.
2. Close all safety guards.
The machine must not start automatically.
¨ ¨
3. Start the machine function.
4. Open the safety guard.
The machine must switch off and it must not be
¨ ¨
possible to start it as long as the safety guard
is open.
Repeat steps 2 - 4 for each safety guard.
Inspection and service
D
C
B A
WARNING
Danger of severe injuries due to the loss of the
safety function.
If damage or wear is found, the complete switch
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and actuator assembly must be replaced. Re-
placement of individual parts or assemblies is
not permitted.
Check the device for proper function at regular
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intervals and after every fault. For informa-
tion about possible time intervals, refer to
EN ISO 14119:2013, section 8.2.
Inspection of the following is necessary to ensure
trouble-free long-term operation:
correct switching function
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secure mounting of all components
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damage, heavy contamination, deposits and wear
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sealing of cable entry
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loose cable connections or plug connectors.
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Information: The year of manufacture can be seen
in the bottom, right corner of the type label.
) for safety functions.
must be used. It signals