A range of 12V dc power supplies for use with Paxton systems. All are designed to connect to a standard UK mains supply via a switched fused spur connection.

The 857-250 and the 857-693 are 2A boxed backup power supplies. This means that when installed with the appropriate battery (listed), the power supply will continue to provide 12V dc for an extended period in the event of a power failure. The exact duration of the backup period will be dependent on the power consumption of the access control system and the capacity of the battery.