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Safety Mats, Sensitive Edges, and Bumpers for Safe Access | TSA
Safety mats, sensitive edges, and bumpers are pressure safety systems.
They enable safe access to hazardous areas or prevent crushing or collision with moving parts of industrial plants.
When these elements are pressed, a short circuit occurs between the internal conductors, triggering the closure of an electrical contact, which is intercepted by a safety control unit or a safety PLC, which then sends a stop signal to the machine.
The continuity of the sensitive elements is monitored by checking the electrical continuity between the conductors respectively White-Green and Brown-Yellow.
If a break occurs between the White-Green and/or Brown-White conductors, the safety control unit reacts by opening the contacts of the safety relays (which are normally closed).
The sensitive element acts as a normally open contact.
The pressure on the sensitive element causes a contact closure resulting in the closure of the circuit between ALL 4 conductors.
Diagram of operation and connection to safety control units
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