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O P E R A T I N G I N S T R U C T I O N S
For the control this means that
activation commands that cause dangerous
conditions, may only become active when the
RE300
guard is in the protective position and the
dangerous conditions have been terminated
before the protective position is cancelled.
Magnetic safety switches
Prior to the use of safety switches, a risk
assessment must be performed on the machine in
accordance with
GB
EN ISO 13 849-1, Safety of machinery, Safety-
related parts of control systems,
SICK AG • Industrial Safety Systems
EN ISO 14121-1, Safety of machinery, principles
Erwin-Sick-Straße 1
of risk assessment,
D-79183 Waldkirch • www.sick.com
EN ISO 12 100, Safety of machinery.
8011171/TN09/2009-10-27 • GO/XX •
Printed in Germany (2009-11) • All rights
1.3
Correct use
reserved
The RE300 switch must be used only as defined in
chapter 1.2 "Applications of the safety switches".
The switch must be used only on the machine
where it has been mounted, installed and
initialised by qualified safety personnel in
accordance with these operating instructions.
All warranty claims against SICK AG are forfeited in
the case of any other use, or alterations being
made to the switch, even as part of its mounting or
These operating instructions are original
installation.
operating instructions.
Correct use includes also
1
On safety
observance of the applicable requirements on
This chapter deals with your own safety and
installation and operation, in particular
the safety of the equipment operators.
– EN ISO 13 849-1, Safety of machinery, Safety-
Please read this chapter carefully before
related parts of control systems,
working with a RE300 or with the machine
– EN 1088, Interlocking devices associated with
protected by a RE300.
guards,
The national/international rules and regula-
– EN 60 204-1, Electrical equipment of
tions apply to the installation, commissioning,
machines,
use and periodic technical inspections of the
the regular inspection of the protective device by
safety switch, in particular
qualified safety personnel in accordance with
the Machinery Directive 2006/42/EC,
section 5.2.
EMC directive 2004/108/EC,
1.4
General safety notes and protective
Work Equipment Directive 89/655/EEC,
measures
the safety regulations as well as
Safety switches provide a protection function for
the work safety regulations/safety rules.
persons. Incorrect installation or manipulations
Manufacturers and operators of the machine
can result in serious injuries.
on which the RE300 switches are used are
responsible for obtaining and observing all
Safety switches are not allowed to be
applicable safety regulations and rules.
bypassed, turned away or made ineffective
in any other manner.
1.1
Qualified safety personnel
The switch must be mounted, installed and
2
Description of operation
commissioned only by qualified safety
personnel. Qualified safety personnel are
The RE300 is a magnetically coded safety switch;
defined as persons who
the switch's contacts are operated by the related
RE300-KA actuator. The safety switch is equipped
have undergone the appropriate technical
with two complementary switching contacts in a
training
normally open/normally closed combination
and
(NO/NC). The switching signals are sampled by
have been instructed by the responsible
suitable safety-related evaluation electronics, e.g.
machine operator in the operation of the
a safe programmable logic controller.
machine and the current valid safety
guidelines
Before the actuator is moved back into the
and
switch on range S
reset distance S
have access to these operating instructions.
1.2
Applications of the safety
2.1
Evaluating the switching signals
switches
Systems up to Performance Level (PL) e as per
Series RE300 safety switches are magnetically
EN ISO 13 849-1 can be realised by integrating
operated, non-contact safety switches. In
magnetic safety switches into suitable safety-
combination with appropriate evaluation
related evaluation electronics. In this case, among
electronics, they protect movable guards such
other aspects the following must be taken into
that
account:
the dangerous state of the machine can only
The evaluation electronics as well as the related
be switched on when the guard is closed,
installation and wiring must comply with the
Performance Level to be achieved as per
a stop command is triggered if the guard is
EN ISO 13 849-1.
opened while the machine is running.
It is imperative all contact signals are evaluated
separately.
The evaluation unit must monitor the signals
from the safety switch for cross-circuits.
On the detection of a fault related to the safety
switch, the evaluation device must shut down
and adopt a locked state.
Both contacts must switch opposite to each
other with a maximum discrepancy time of
1500 ms; this time is to be monitored using the
evaluation electronics.
On the connection of the safety switch to a fail-
safe control, the input module should be
configured such that the discrepancy time set
has no effect on the shutdown time for the
evaluation (typical configuration "provide 0"). If
this is not possible, the calculation must take
into account the response time.
The control's inputs/outputs connected to
the magnetic safety switch must meet the
requirements of EN 61 131.
It must be ensured the possible current
through the contacts on the switch does not
exceed the specified maximum value.
Fig. 1: Wire colours RE300-DA..
Contact assignments
Function
1 blue/4 red
NO contact
2 yellow/3 green
NC contact
In the unactivated state (output state OFF), the NO
contact 1 (blue)/4 (red) is open and the NC
contact 2 (yellow)/3 (green) is closed (cf.Fig. 2).
Input behaviour
a
b
a
b
Max. 1500 ms
Output behaviour
Fig. 2: Switching behaviour (illustration shows the
deactivated state)
, it must be ensured the
ao
is exceeded.
Reset
3
Mounting
Mounting is only allowed to be performed
by qualified safety personnel.
Fit the safety switches in compliance with
EN 1088 such that
they are difficult for operators to access
when the guard is open (Fig. 3),
it is possible to inspect and replace the
safety switches.
1 blu
2 yel
Fig. 3: Protection example for bypassing a mag-
netic safety switch in compliance with EN 1088
3 grn
Note the possible operating positions inFig. 4.
4 red
Fit safety switch and actuating element such
that they do not touch each other: minimum
distance between the front faces with the guard
closed 1 mm (Fig. 5).
Fit an additional stop for moving parts of the
guard (Fig. 5).
Mount safety switch and actuator on guard so
that they cannot be detached.
Mount safety switch and actuator on non-ferrous
materials to prevent any effect on the switching
distance.
Tighten self-locking screws to 1.0 Nm.
Do not use anaerobic adhesive (e.g. Loctite) to
lock the screws, as this will attack the plastic
housing.
Minimum distance between two adjacent
magnetic safety switches: 25 mm. On swivelling
doors the actuator is to be fitted to the closing
edge (Fig. 6)
15
OFF
5
ON
–15
–4
0 mm
4
15
Misalignment tolerance on the sides [mm]
Fig. 4: Alignment of read head and actuator
5.2
Stop
To ensure correct function over the long term,
regular checks are necessary.
5.2.1 Regular examinations
Daily or before starting a shift, the operator
must check the RE300 safety switch for
correct function
and
visible signs of tampering
At appropriate intervals, it is also necessary to
check
min. 1 mm
the safe mounting of actuators and read
heads,
the sealing at the cable glands on the read
Fig. 5: Mounting example for safety switch and
heads,
actuator
the seating of the cable connections on the
evaluation device
and
the shutdown distances.
5.2.2 Inspection by qualified safety
The inspection by qualified safety personnel
must be performed regularly as per the
applicable national and international
regulations within the intervals defined. This
Fig. 6: Mounting example on swivelling doors
procedure ensures that any changes on the
4
Electrical installation
machine or manipulations of the protective
device after commissioning are detected.
The electrical connection is only allowed to
be made by qualified safety personnel
trained in EMC.
Only use copper wires. In case of use in high
ambient temperatures, the temperature data for
the field cable must not be lower than the
ambient temperature.
5
Commissioning
5.1
Tests before the first
commissioning
Mechanical functional check:
– Safety switch and actuating element must not
touch when the guard is closed.
– Minimum distance with guard closed 1 mm.
Electrical functional check:
Close the guard.
Start the machine.
Open the guard.
Check whether the machine stops when the
guard is opened.
Switch off the machine.
Open the guard.
Start the machine.
The machine must not start with a guard
open!
Periodic technical checks
personnel
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