This has been introduced to address market demands by extending application coverage to include lead acid battery charging – not compatible with the ‘hiccup’ mode of protection featured on the rest of the range. As with other products in the range, the 78.50 has a plethora of design features to improve reliability and efficiency, giving control system builders a stable and dependable low voltage DC supply, up to 91% efficient, and drawing only 0.4W in standby.

This series of modular, rail-mounted DC power supplies now comprises models covering outputs rated 24VDC/12W, 24VDC/36W, 24VDC/60W, 12VDC/12W and 12VDC/50W – all supporting a wide AC or DC supply range capability of respectively 100-265VAC and 140-370VDC.

Integrating the latest protection technologies, the 78 Series includes: supply overvoltage (varistor) protection, thermal protection with fast output voltage shutdown; short circuit and overload protection with ‘hiccup’ (auto-recovery) protection – except the 78.50 with ‘foldback’ overload protection. In addition, the high inrush current handling capability means the power supplies will safely tolerate loads with high current transient characteristics, such as capacitive circuits and solenoids fitted with ‘economy’ resistors.

To help minimise downtime in the event of a fault, the power supply inputs are protected by an easy access internal fuse, with an adjacent spare fuse ensuring an even more immediate fix.