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