effeff launches electric strike with fail safe functionality The fail safe electric strike 343 from effeff is particularly suitable for heavily used doors in industry, office buildings, public administration buildings and public institutions. The fail-safe design means the strike is only locked when it is connected to a power supply. If the power supply is switched off or is interrupted due to a power failure, the door can still be opened. Its design is similar to effeff’s time-tested Fire Protection Electric Strike 143. “The Electric Strike 343 comes into play for security applications and other special uses, particularly as an additional locking device in interlock systems, for instance,” explains Michael Holzer, Electro-mechanics product manager at ASSA ABLOY Sicherheitstechnik, the company behind the effeff brand. The new strike stands out due to its optimum quality and versatility. The symmetric design and a voltage range between 12 and 24 volts in DC operation enable the 343 to offer increased planning reliability. Besides providing reliable surge protection, the integrated TVS diode is also polar-neutral. “Fitters no longer need to make sure positive and negative poles are in the right position, and it can be readily combined with access control systems, says Michael. “With the new 343 model, we have brought an electric strike onto the market which offers a solution for all fail-unlocked applications. However, fitters need to bear in mind that the 343 is not approved for electrical locking systems in emergency exits. effeff’s electric strikes 331U and 332 are certified and approved for such uses.”More electronic and electromechanical products.