Wieland Electric has introduced the SNH Series of emergency-stop pushbuttons, which includes a range of eight operator elements that can be combined with 12 different contact blocks. In addition to the modular components, Wieland supplies a number of completely assembled emergency-stop pushbuttons for the most common applications. For increased safety, Wieland's SNH Series of emergency-stop pushbuttons incorporate a contact block drop-off feature that provides a signal output should failure occur if the contact block becomes dislodged due to vibration.This has an additional NO contact in series (pre-installed) to the main contacts - the NO contact opening as soon as the contact block falls off, thus interrupting the safety circuit and putting the machine into a safe position. An illuminated stop button also provides enhanced safety for the machine user. SNH pushbuttons are unlocked by rotation or with the use of a key and are supplied with or without a protective collar.
The pushbuttons offer a high degree of protection with an IP69 rating and the switching capability of the contacts is AC250V/16A. Wieland's SNH Series has been designed for use in conjunction with the company's 400 Series relays, SMA safety sensors and Samospro, a compact modular safety controller for machine and automation control.
