EUCHNER SGPxxAS1 - Handbuch (Seite 4)

Operating Instructions Safety Switches SGP..AS1
Correct use
EUCHNER safety switches series SGP...AS are
operated as a slave on the safety bus
AS-Interface
Safety at Work and function as interlocking devices
without guard locking.
In combination with a separating safety guard, this
safety device prevents dangerous machine move-
ments from occurring while the safety guard is open.
A stop command is triggered if the safety guard is
opened during the dangerous machine function.
For the control system, this means that
f starting commands which cause hazardous
situations must become active only when the safety
guard is in the protective position.
Before safety switches are used, a risk assessment
must be performed on the machine, e.g. in
accordance with
f EN ISO 13849, Safety of machinery - Safety-related
parts of control systems
f EN 12100-1, Safety of machinery - General
principles for design - Risk assessment and risk
reduction
f IEC 62061, Safety of machinery. Functional safety
of safety-related electrical, electronic and
programmable electronic control systems.
Correct use includes compliance with the relevant
requirements for installation and operation, e.g.
f EN ISO 13849, Safety of machinery - Safety-related
parts of control systems
f EN ISO 13849-1:2006, Safety of machinery. Safety
related parts of control systems. General principles
for design
f EN 1088, Safety of machinery. Interlocking devices
associated with guards. Principles for design and
selection
f EN 60 204-1, Electrical equipment of machines.
Important:
f The user is responsible for the integration of the
device in a safe overall system. For this purpose
the overall system must be validated, e.g. in
accordance with EN ISO 13849-2.
f If the simplified method according to section 6.3
EN ISO 13849-1:2008 is used for validation, the
Performance Level (PL) may be reduced if several
devices are connected one after the other.
f 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.
Safety precautions
Safety switches fulfill a personal protection function.
Incorrect installation or tampering can lead to severe
injuries to personnel.
Safety components 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.
The switching operation may only be triggered
by actuators specially provided for this purpose
which are permanently connected to the
protective guard.
A complete safety-oriented system generally
consists of several signaling devices, sensors,
evaluation units and concepts for safe shutdown.
The manufacturer of a machine or installation is
responsible for correct and safe overall function.
All safety instructions and requirements stated
in the Operating Instructions of the AS-Interface
safety monitor used must be observed.
Mounting, electrical connection and setup only
by authorized personnel.
Function
EUCHNER safety switches series SGP...AS feature a
slave connection to the safety bus
AS-Interface Safety
at Work. They permit safe monitoring of movable
safety guards.
The position monitoring of the safety guard is carried
out with two positively driven contacts.
When the safety guard is closed, each SGP...AS
transmits a switch-specific, unique safety code
sequence with 8x4 bits via the AS-Interface bus. This
code sequence is evaluated by an AS-Interface safety
monitor. The first positively driven NC contact is
represented by the AS-Interface input bits D0 and
D1, while the second positively driven NC contact is
represented by D2 and D3.
The switch-specific safety code sequence is
transmitted via the AS-Interface input bits D0 to D3
when the safety guard is closed.
When the safety guard is open, the values 0, 0, 0, 0
are transmitted in every bus cycle by D0 to D3.
The safety switch must be correspondingly configured
in the AS-Interface safety monitor (refer to the
operating instructions of the AS-Interface safety
monitor used and the status table).
Mounting
Safety switches and actuators must not be used
as an end stop.
Mount the safety switch only in assembled
condition!
Increased overtravel of the actuator is not
possible with vertical approach direction.
Assemble the safety switch so that
f access to the switch is difficult for operating
personnel when the safety guard is open.
f address programming, inspection and replacement
by authorized personnel is possible.
f Insert the actuator in the actuating head.
f Mount the safety switch positively.
f For safety-related applications (fixed position), mount
switch with M5x30 screws.
f Permanently connect the actuator to the safety
guard so that it cannot be detached, e.g. using the
enclosed non-removable screws, rivets or welding.
f Fit an additional stop for the movable part of the
safety guard.
Changing the actuating direction
Figure 1: Changing the actuating direction
f Insert the actuator in the actuating head.
f Remove the screws from the actuating head.
f Set the required direction.
f Tighten the screws with a torque of 0.6 Nm.
f Cover the unused actuating slots with the enclosed
slot covers.
Protection against environmental influences
A lasting and correct safety function requires that the
actuating head must be protected against the
penetration of foreign bodies such as swarf, sand,
blasting shot, etc.
Cover the unused actuating slot with the slot cover.
Cover the actuating slot, the actuator and the rating
plate during painting work!
Only use solvent-free cleaning agents to clean the
switch!
Electrical connection
For use and operation as per the requirements of
(UL), an isolating transformer or a power supply
with secondary overcurrent protection (3 A) must be
used.
The safety switch is connected to the bus system
with a 2- or 4-pole connecting cable with M12 plug
connector via a passive AS-Interface distribution box
with a yellow AS-Interface cable.
Figure 2: AS-Interface M12 plug connector terminal
assignment
Setup
f Setting the AS-Interface address
The address can be set prior to or after assembly.
The AS-Interface address of the safety switch is set
using, for instance, an AS-Interface programming
device. Addresses 1 to 31 are valid.
The unit is programmed by connecting the program-
ming device to the M12 plug connector on the safety
switch with an AS-Interface programming device.
Address 0 is the default setting on delivery (the AS-
Interface LED
Fault! is lit during operation).
f Configuration in the AS-Interface safety monitor
(see operating instructions for the AS-Interface safety
monitor and status table)
The safety switch is configured in the AS-Interface
safety monitor with the AS-Interface address set as
follows, for example:
f Two-channel dependent
f Synchronization time: typ. 3 s
It may be necessary to set the synchronization time
to higher values. This depends on the application
and the approach speed of the actuator.
f With start-up test (corresponding to risk analysis)
In this operating mode, the safety guard must be
opened each time prior to restarting in order to per-
form the start-up test.
f LED indicators
The AS-Interface bus status is indicated by two LEDs
(Power, Fault) behind the lock cover on the safety
switch.
1 AS-Interface +
2 Not used
3 AS-Interface -
4 Not used
View of safety switch
plug connector
4 3
1 2