5.2
Operator of the machine
DANGER
Failure to observe operator obligations
Hazard due to lack of effectiveness of the protective device
b
Changes to the machine and changes to the mechanical mounting of the safety
locking device necessitate a new risk assessment. The results of this risk assess‐
ment may require the operator of the machine to meet a manufacturer’s obliga‐
tions.
b
Apart from the procedures described in this document, the components of the
safety locking device must not be opened or modified.
b
Do not carry out any repair work on components. Improper repair of the safety
locking device can lead to a loss of the protective function.
b
Make sure that replacement actuators are not used for bypassing. Restrict access
to actuators.
5.3
Design
DANGER
Bypassing the protective device
Hazard due to lack of effectiveness of the protective device
b
Eliminate any temptation to tamper with the safety locking device by implementing
measures such as the following:
°
Attach safety switches with a cover or with shielding, or ensure they are out of
reach.
°
Cover the safety switch and the actuator with additional equipment or protect
them against access. Cover the sensor and the actuator with additional
equipment or protect them against access.
5.4
Integrating into the electrical control
Switch-on commands which bring about a dangerous state of the machine must not be
enabled until the protective device is closed and the lock is activated. The lock must not
be deactivated until the dangerous state has ended. Depending on the safety concept,
the signal is analyzed by, e.g., safety relays or a safety controller.
5.5
Testing plan
The safety locking device must be tested by appropriately qualified safety personnel
when commissioning, after modifications, and at regular intervals.
The regular thorough checks serve to investigate the effectiveness of the safety locking
device and discover defects because of modifications or external influences (such as
damage or tampering).
The manufacturer and user must define the type and frequency of the thorough checks
on the machine on the basis of the application conditions and the risk assessment.
Determination of the thorough checks must be documented in a traceable manner.
5
PROJECT PLANNING
12
O P E R A T I N G I N S T R U C T I O N S | i10 Lock
8022168/2017-11-14 | SICK
Subject to change without notice
