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Start interlock
After commissioning or an interruption in the mains power supply, enabling is prevented by a start interlock. The start button must
be actuated in order to enable the switching outputs.
Response time
The time which elapses between penetration of the protective field and deactivation.
Blanking
Blanking is used to disable parts of a protective field, e.g. to permit workpieces and/or machine components to penetrate the
protective field without impairing the machine's functionality.
Contactless protective mechanisms (BWS)
ULCT safety light curtains are contactless protective mechanisms (BWS). These mechanisms interrupt or prevent hazardous
movement on an infiltration of the protective field generated by the transmitter and receiver.
Single/dual-cycle operating mode
Following single/double infiltration, the machine automatically executes an operation and then waits for up to 30 seconds for
single/double infiltration.
If the time exceeds 30 seconds, the restart interlock becomes active.
EDM - External Device Monitoring Refer to valve and contactor control.
Installation range (Fig. 35/1)
Minimum and maximum permissible distances between the transmitter and receiver.
The installation range is indicated on the ULCT receiver.
Obstruction size (Fig. 35/1)
The obstruction size indicates the minimum obstruction diameter needed for the safety
light curtain to reliably interrupt hazardous movement.
Obstruction sizes and corresponding beam ranges for ULCT safety light curtains are
listed below.
Muting
Brief and secure bypass of ULCT safety light curtains during material conveyance, e.g. entry into and exit out of a production cell
or high-rack warehouse. Reliable distinctions are made here between movements by humans and material.
Run-on distance (Fig. 35/2)
The distance covered by hazardous movement following deactivation
(e.g. travel of a ram or a point on a roller's surface).
Run-on time
The time taken to come to a complete stop following deactivation.
Protective field height (Fig. 35/1)
The height of the protective field generated by the transmitter and receiver.
Protective mode
The switching outputs are disabled on interruption of the protective field, and enabled
automatically once the field has been cleared again.
Self-monitoring
The automatic response of a contactless protective mechanism to an internal error.
Safety clearance (Fig. 35/2):
The minimum distance needed between a safety light curtain and the nearest hazard zone in order to prevent injury. Safety
clearances are calculated with the help of the formulae prescribed by standard EN 999 / ISO 13855, machine-specific C-norms
and valid ZH directives.
35
Max. installation range
5 m
5 m
Min. obstruction size
14 mm
30 mm
8
Definition of terms
Fig. 35/2: Safety clearance and run-on distance
Fig. 35/1: Installation range, obstruction size, protective field height
Table 35/1a: Installation range, obstruction size, protective field height
Protective field
height
Installation range
Table of Contents
S
Nachlaufweg
der Maschine
FIESSLER
E L E K T R O N I K
Machine's
run-on path
Fiessler Elektronik GmbH & Co. KG
Telefon: +49 (0) 711 / 91 96 97-0 Internet: http://www.fiessler.de
Telefax: +49 (0) 711 / 91 96 97-50 eMail: [email protected]
Doku Nr. 1121 Stand 08.01. 2018 RK/Aui