Dycon offer switched-mode units that conform to EN50131/PD6662:12 at Grades 2 and 3. As well as all the usual Dycon advantages, the Grade 3 version learns the battery configuration at installation and responds if any changes are made.
General Purpose 12, 24, 27VDC and 27VAC Power Supplies and accessories
Specialist Intruder Alarm Power Supply Units
12VDC Rechargeable Batteries