Vandal-resistant switches
14 September 2011
Switches, Relays & Keypads
Bulgin announced new versions of its MPI range of illuminated, vandal-resistant switches. All MPI switches have bodies and buttons machined from high-grade stainless steel, and a tough polycarbonate lens in the stainless steel actuator provides a robust and aesthetically pleasing switch.
All MPI switches are front-panel sealed to IP66, while the new range is also rear-of-panel sealed. This makes them suitable for use outdoors or in other situations where condensation or leakage behind control panels can be problematic. Rear panel sealing is available in a variety of styles, including single and dual colour with dot or ring LED illumination. Independent switch and LED terminals provide the flexibility to choose between permanent or controlled illumination. Contacts are single-pole, push-to-make.
The switches have either solder tags or screw terminals, which facilitates easy field servicing, and also feature potted moulding and flying leads to the rear of the switch. With integral supply resistors, the LEDs can be driven directly from 6, 12 and 24 V supplies. The MPI series is tested to 750 000 mechanical and 35 000 electrical operations and rated at 50 mA, 24 V d.c. The series has also recently undergone design improvements at construction stage, incorporating surface mount LEDs and TVSs.
All switches in the MPI series have momentary action contacts, making them suitable for access control and door entry applications including lifts, panic buttons, car park barriers, emergency telephones, vending machines and food processing.
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