The PSU12121.007 is a self contained switch mode 12v 1.0 A switch mode power supply, plus 0.5A for battery recharge. Additional features include; deep discharge protection, selection of fault outputs, internal LED's for fault diagnosis, tamper protection and space for a 17Ah sealed lead acid battery. Note 7.0Ah must be used to maintain the certification. Housed in a mild steel enclosure with space for various interface cards. EN50131-6: 2008 certified.