Pilz PSEN me1.21S / 1AR - Manual (Page 5)

Installation and Operating Instructions
Date of issue: 22.02.2006 / Page 11 of 12
Document : 0800000458 / Version: 01 / 2196-06
Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, D-73760 Ostfildern, Deutschland
Phone: +49 711 3409-0, Fax: +49 711 3409-133, E-Mail: [email protected], www.pilz.com
Template : 0850174292 Orig. 2
System description / Suggested application
When the machine guard is closed, the actuator is engaged and locked in the safety switch. In this state the safety outputs in
the safety control module are closed and the contact in the control module (for the solenoid) is open - the machine can now
operate.
In order to carry out maintenance work behind the safety guard the operator has to switch off the machine. This will cause
opening of the outputs of the control module and shutoff of the machines power line. As the dangerous movement of the
machine may not stop immediately, the safety switch lock should only release the actuator after the machine has come to a
complete stop. A suitable control module, e.g. a lost-motion monitor or a delay module (safety timer) can be used for that
purpose.
The safety contacts (force disconnected N.C.) inhibit the machine from restarting whilst the machine guard is open. The
additional N.O. contacts can be used as signaling contacts, they do not have a safety function and are normally used for
indication only. These functions do not conduce safety, just availability of machinery. When used in conjunction with suitable
control modules the NO contacts may be used only for additional verification of the safety circuit.
The set of contacts monitoring the safety guard is form-fit driven by the actuator, so that the position of the safety guard is
directly monitored. The set of contacts monitoring the locking device has a positive drive connection to the lock. Thus ensures
that any failure of the locking device will be immediately detected by the safety control system. An integrated mechanical
mechanism ensures that the lock cannot be engaged whilst the actuator is removed from the safety switch.
The safety switch PSEN me1 can be applied in combination with other safety switching devices and safety control modules in
systems up to control category 4 acc. to DIN EN 954-1 when the applicable standards are maintained.
Maintenance / Inspection
The switching device is
maintenance-free. For trouble-free
operation and a long service life
the device should be inspected
regularly. Ensure that:
- all components are secure and tight
- switching functions operate properly
- all sealing gaskets are in proper
condition
- the components show no signs
of tear and wear.
If defects are the detected the
complete switching device and the
actuator have to be replaced.
Liability disclaimer
By breach of the given instructions
(concerning the intended use, the
safety instructions, the installation
and connection through qualified
personnel and the testing of the
safety function) any liability
expires.
- actuator inserted and locked
- solenoid un-energised
Control voltage
Control contact
Actuator
contacts
(guard position)
analysing
module control
module
Hazardous machinery
Solenoid contacts
(guard locking)
Contact assignment
illustrated for standard type :
PSEN me1S/1AS
570000