32Separate Backlight and Electric Lock SupplySeparate power supplies are necessary where the lock requires voltage higher than 12V. In this case, an additional power supply (12V) must be used to illuminate thebutton backlight - see the figure below. Other reasons for such connection are theeffort to minimise consumption from the back-up supply (which supplies the lock, notthe backlight), or just that two weaker power supplies are availableLock and Backlight ConnectionConnection of Switch 2A new additional switch, Part No. 9135250E, has been designed for 2N® Helios. Itcan be mounted into any basic unit, as an added option. To connect it, follow theinstructions included in the switch delivery.El. lockSupply ACor DCmax.48VSupply ACor DCmax.12 Vtel.line
