12/24VDC Monitored. The ASEC Standard Single Magnet has an electro-less nickel plated armature with an aluminium housing and is designed for single door applications and is available monitored or unmonitored. It has a holding force up to 1200lbs (544kg) and the input voltage is switchable between 12V DC or 24 V DC.. Holding force up to 1200lbs (544kg). Operating voltage 12/24Vdc (Selectable). Electro-less nickel plated armature. Aluminium housing