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UL 294 for Access Control System Units Revised

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UL has announced a revision of the  standard for access control system units. UL 294 can be purchased on the UL website.

Description*
“These requirements apply to the construction, performance, and operation of physical access control equipment and/or systems intended to regulate or control:

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A Dash of Maxwell’s: A Maxwell’s Equations Primer – Part Two

Maxwell’s Equations are eloquently simple yet excruciatingly complex. Their first statement by James Clerk Maxwell in 1864 heralded the beginning of the age of radio and, one could argue, the age of modern electronics.

a)    Entry into and/or exit from a controlled area, protected area or a restricted area or

b)    Access to or the use of a device(s) by electrical, electronic or mechanical means.”
*Description from the UL website.

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