Catalogs > Safety Products Catalog > Presence Sensing Safety Devices > Selection Criteria
Selection Criteria
| Selection Criteria |  |
Selection Tips | |
Selection Navigator | |
Technology Overview | |
Technology Overview (continued) | |
Point of Operation Control (POC) Light Curtains
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Features/Benefits
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.
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
Perimeter Access Control (PAC) Light Curtains
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Features/Benefits
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.
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