Product Description; Layout Of The System; Operating Principle - SICK LCU-P Guide D'utilisation

Chapter 3
3
General
320
General
3.1

Layout of the system

The LCU Programmable Safety Interface Light Curtain Control
Unit is a control unit for active optoelectronic protecting
devices (AOPD), and is designed as a self-monitoring device in
accordance with pr EN 50100. It is intended for industrial
applications.
3.2

Operating principle

The LCU-P programmable safety interface expands the
possibilities offered by non-contact safety sensors. It evaluates
the OSSD signals from two type 4 sensor systems or up to
four type 2 sensor systems and switches the necessary
contact elements (contactors) of the machine controller by
way of two-channel semiconductor outputs. It permits
protection mode, single break and double break PDSI mode
(up to eight cycles). External contact monitoring and restart
inhibit functions are selectable. Together with the FGS safety
light curtain, the device permits fixed and floating blanking. For
muting operation, up to four muting sensors can be
connected. The data interface RS 485 provides a sensor
control and diagnosis facility.
The signals arriving at the LCU-P from the peripheral
equipment are further electronically processed by dual channel
microprocessor electronics. Type 2 sensors (testable) and/or
Type 4 sensors (self-monitoring) may be operated with the
LCU-P. The internal control system can distinguish between the
different categories. Type 2 sensors are automatically
cyclically tested by the LCU every 60 minutes.
8 008 364/NB 86/25-04-00 © SICK AG • Safety Systems • Germany • All rights reserved
Operating instructions
LCU-P