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Type 2 vs Type 4 Safety Light Curtains: Risk-Based Selection Decision Tree
Choosing between a Type 2 vs Type 4 safety light curtain is not a budget decision or a brand preference, it is the output of a formal risk assessment. Either direction costs money: over-specify and you pay for integrity you…
Safety Light Curtains: 2026 Buyer’s & Selection Guide
Safety light curtains are non-contact presence-sensing safety devices that stop a machine the instant someone breaks an infrared beam. They look deceptively simple: two aluminum sticks, an invisible wall of infrared light, and a machine that stop when a beam…
Safety Light Curtain Wiring Diagram + OSSD Connection to Allen-Bradley GuardLogix / Siemens
A safety light curtain wiring diagram is simple on paper: two output wires, a 24VDC supply, and a ground. In the panel it’s seldom so. Those two output wires are OSSDs – Output Signal Switching Devices – and how you…
Type 2 vs Type 4 Safety Light Curtain: SIL Decision Guide (2026)
Making a choice between a Type 2 or Type 4 safety light curtain isn’t often much of a free choice – the answer is dictated by the risk graph in ISO 13849-1, the IEC 61496-1 ESPE standard, and the machine-type…
What Is a Safety Light Curtain? Definition, Types & Standards
What is a safety light curtain? Put simply, the light curtains is an electro-sensitive protective equipment (ESPE) with an array infrared light beams that detects a person or part of a person entering, 86 milliseconds under IEC 61496-1: 2020, a…
Overhead Crane Safety: OSHA 1910.179, Hazards & Prevention (2026)
Overhead crane safety sits at the line where a steel mill’s productivity ends up in a coroner’s report. From 2011 to 2017, the U.S. Bureau of Labor Statistics tracked 297 work-related fatalities involving cranes. That works out to an average…
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