3520/3540/3550/3570 24VDC Power Supplies Providing necessary 24VDC power requirements to all SARGENT electromechanical and access control locks, the 3520, 3540, 3550 and 3570 Series 24VDC Power Supplies feature integral battery charging capability to maintain full charge even in the case of line voltage failure. Each circuit can be individually turned on and off via a slide switch, with the power status of each is shown by an LED. BENEFITS UL Class 2 Listed Four models available: 1, 2, 4, or 6 amps Fire alarm interface standard Downloads Installation Instructions Electroguard Catalog Request Information Discuss your needs directly; fill out the form below. loading Interested in this product? Contact Us Related products 3521/3541/3551/3571 12VDC Power Supplies Timer Model – TMR9 Release Hold Timer 3287 Door Status Switch