Russiaville Relays and Industrial Controls Mfrs 310 S Union St Functional Devices, Inc. specializes in the desgin and manufacturing of relays, current sensors, power supplies, transformers and power control for building automation systems. Russiaville IN Relays and Industrial Controls Mfrs Functional Devices Inc www.functionaldevices.com relay rib relay in a box rib relay functional devices functional devices prepackaged current sensor sensors power supplies power control energy management wireless relay rib relay in a box rib relay functional devices functional devices prepackaged current sensor sensors power supplies power control energy management wireless Business Reviews Functional Devices Inc Testimonials