Most light curtain controllers contain three relays: two control or safety relays and one auxiliary or status relay. They also include a power supply that receives AC or DC inputs. Integral light ...

When a beam is obstructed by an opaque object, a safety relay halts the machinery or process within milliseconds. Some light curtains allow the process to resume once the obstruction is removed, while ...

Standard relays and safety relays are two distinct types of devices, each designed for different purposes and serving ...

Figure 1. A basic machine like this tape wrapper can be designed to provide the necessary safety using safety relays and light curtain relays. Figure 2. Safety relays, like these examples from ...

Safety relays or safety-rated controllers must be used to monitor safety switches, safety limit switches, light curtains, and safety mats and edges. In small machine control applications, a safety ...

The Girl Scouts are moving their operations to a former bank building in western Henrico County.

Holiday lighting makes our homes and neighborhoods shine, but every year as we decorate our spaces, it's important to consider the electrical safety, energy consumption, and other factors involved ...

Two people are dead after a tractor-trailer ran off the interstate on Friday morning.

Many University of Minnesota students think safety on the Minneapolis-St. Paul light rail should be improved but are skeptical about effective methods to improve these conditions. In January, the ...

The best blackout curtains can block out light, keep you cool and help promote restorative rest. We spoke with home design experts and researched the market to find the very best options across ...

and improve safety by automatically illuminating areas when movement is detected," explains Joel Worthington, president of Mr. Electric. There’s a range of outdoor motion sensor lights to choose ...

A look at the next generation of safety and driver assistance ... was about to speed through a red light, alerting the cross traffic to the danger. But, the relays aren't likely to be as fast ...