Retainer for dual voltage fire door. Designed to keep fire doors open. The performance of the equipment is carried out when 24V is stopped. Holding force of 60Kg / 585N. Possibility of 12V or 24V power supply. Consumption: 170mA at 12V / 85mA at 24V. Equipped with an articulated ferromagnetic plate. Supplied with box, release button and 300 mm arm.