4
EN
1. General
The SG4 light curtain system is a design-approved, electro-sensitive protection equipment (ESPE) in accordance
with EN 61496-1. It’s a class 4 Light Curtain, i.e. it’s an ESPE for which the safety function remains intact even if
several errors occur. Furthermore, it’s a category 4 Safety Light Curtain, and is thus a self-testing safety device.
The light curtain system consists of a emitter module and a receiver module. A muting module and a relay unit are
available as accessory equipment.
1.1 Function and Use for Intended Purpose
The light curtain monitors the safety field between the emitter and the receiver. If the safety field is penetrat-
ed by an obstruction, a switching command is triggered. This switching command may prevent initialization
of a hazardous machine motion, or may stop an action which has already been started.
Use of the light curtain is only permissible if:
• Hazardous motion can be stopped by electrical means using the light curtain’s safety output
• Adequate detection of possible obstruction is assured with existing resolution
• An application of Light Curtain of Category 4 is permissible.
1.2 Features
• Safety device per EN 61496-1
• TÜV approved
• Finger protection: 14 mm resolution, 7 m range
• Hand protection: 30 mm resolution, 20 m range
• Visible red light
• PNP semiconductor safety outputs
• PNP signal output
• Fix Blanking
• Floating Blanking
• Auto Floating Blanking
• Electronically reduced resolution
• Simple cascading
• Serial interface with visualization program
• Restart inhibit
• Monitoring of external relays
• Muting (optional)
• Relay unit (optional)
• Coding
1.3 Applications Examples
Safety protection at:
• Presses
• Saws
• Textile machinery
• Transfer lines, assembly lines
• Automatic insertion equipment
• Packaging machines
• Rotary indexing machines
• Woodworking machines
