The SNH emergency stop pushbutton series from Wieland Electric is a modular system that can be adapted to the needs of the machinery manufacturer, with a range of eight operator elements that can be combined with 12 different contact blocks. In addition to the modular components, Wieland is able to supply a number of completely assembled emergency stop pushbuttons for the most common applications.
For increased safety, the SNH Series has a contact block drop-off feature, which provides a signal output in the event of failure (contact block becoming dislodged due to vibration). This has an additional Normally Open (NO) contact in series (pre-installed) with the main contacts, the NO contact opening as soon as the contact block falls off, thus interrupting the safety circuit and placing the machine in a safe state. An illuminated Stop Button also provides enhanced safety for the machine user.
SNH Pushbuttons are unlocked by rotation or by key and are supplied with or without a protective collar. Protection rating up to IP69 is available and the switching capacity 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 automation and control.