Specifications

Presence Sensing Safety Devices
Technology Overview
2-7
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Publication S117-CA001A-EN-P
GeneralPrinciples
2-Selection
Criteria
Safety SwitchesOperator
Interface
LogicPower
R
Features/Benefits
Applications
 Conveyors
 Electronic fences
 Forming operations
 Robot Cells
 Presses
 Workstations
 Washdown applications (use IP 67 tube
accessory)
Common Misapplications
 Used on full revolution machinery
 Mounted too close to hazard
Point of Operation Control (POC) Light Curtains
Perimeter Access Control (PAC) Light Curtains
Features/Benefits
Applications
 Conveyor Systems with muting
 Robot cells
 Opto-electronic fence
 Washdown with IP 67 tube
Common Misapplications
 Used as POC device
 Used on machine that does not stop until
completing a full revolution
 Horizontal installation
GuardShield
GuardShield
Safe 4
GuardShield Micro 400
GuardShield
PAC
GuardShield
Safe 4 PAC
POC light curtains are placed close to the hazard, at the point of operation where
personnel may frequently interact with the machine as part of a process. POC light
curtains are designed for partial-body detection—finger, hand, and arm detection—and
are offered in multiple resolutions and protective heights. An easy-to-install Category 4 SIL
3, PLe solution, these light curtains are easily connected to other safety systems, but
usually do not require a separate controller and can therefore be operated as standalone
units (i.e., without a safety relay). Since they are located at the machine’s point of
operation, POC light curtains eliminate the need for gates, allowing frequent and easy
access to the hazardous area, and can be used as an ergonomic workstation control that
increases safety while enhancing productivity. These light curtains can be mounted
vertically or horizontally. However, it is important to note that these light curtains do not
detect people or objects once they have passed through the light curtain.
POC light curtains are also suitable for use in washdown applications when used in
conjunction with the IP67 or IP69K light curtain enclosures.
PAC light curtains are an easy-to-install, Category 4 solution for full-body access
detection. Designed to create a safety perimeter around a machine that does not require
frequent interaction between personnel and the hazard during regular operation, PAC light
curtains provide large object pass-through sensing with detection ranges up to 30 meters.
PAC light curtains can be easily interfaced with other safety systems or used as
standalone units without a dedicated control unit/safety relay. However, it is important to
note that these light curtains do not detect people or objects once they have passed
through the light curtain.