/community-hubs/deltav-community-connect/b/delta-vweblog/posts/providing-24vdc-to-field-devicesSome field devices such as an inductive proximity switch may be designed as three wire devices that require a 24VDC source of power. In such cases it is possible to tap into the 24 volt bulk power supply in the rack room and run twisted pair to the deviceen-USTelligent Community 13