Functional Devices — RIB Relays, Sensors and Control Components for HVAC, BAS and Facility Service
Functional Devices is a specialist manufacturer of packaged relays and field-level building automation components, with the Relay In A Box® (RIB®) family as its most widely recognized product line. The company’s RIB relays and companion devices are designed to simplify installation by delivering factory-wired, pre-enclosed relay assemblies, current sensing modules and related control products that reduce field wiring, speed commissioning and standardize replacement parts for contractors and facilities teams.
What Functional Devices is known for
- Relay In A Box (RIB®) enclosed pilot and power relays: factory-enclosed relays in NEMA-style housings that provide a finished install package (relay, socket, enclosure and conduit hub) for pilot and power control.
- Current sensors and combined relay/sensor modules: closed-core and split-core sensing for load monitoring and responsive control.
- Power supplies, transformers and accessories for control circuits: designed to pair with relays and field controllers.
- Modular and panel-mount relay modules for OEM and control-panel builders.
Main product families and technologies
Functional Devices groups products around the RIB® platform and supporting components:
- Enclosed pilot relays (10 A) and power relays (20 A) in RIB housings with LED status indicators, optional override switches and multiple coil-voltage choices.
- Panel-style and modular relay modules (track or panel mounting) for integration into control panels and BAS racks.
- Current sensors, sensor/relay combinations, and analog feedback options for energy and motor monitoring.
- Low-voltage power supplies and transformers sized for typical building-control circuits.
Common applications
- Commercial HVAC and building automation (BAS): pilot and power switching for valves, dampers, fans and lighting circuits.
- Lighting control and energy management: switching ballast loads, tungsten and LED drivers where pilot duty or 10–20 A switching is required.
- OEM and panel builders: modular relay packages that reduce assembly time and ensure consistent product labeling.
- Maintenance, facilities and contractors: drop-in replacements to modernize or repair field relay assemblies without reworking enclosure or conduit arrangements.
How to identify and choose the correct model
- Match coil voltage and control type: confirm the control circuit voltage before selecting a replacement.
- Confirm contact form and amp rating: common RIB parts are 10 A pilot relays and 20 A power relays; choose SPDT/DPDT or SPST as required.
- Verify enclosure and mounting style: RIB enclosed housings typically include a 1/2" or 3/4" NPT hub or are available in panel/track modules.
- Check pilot duty and load type: review pilot-duty, ballast and tungsten ratings on the datasheet when switching lighting or inductive loads.
- Review coil current and controller capacity: ensure the upstream controller or sensor can source the coil current or use an appropriate driver.
How Safsale helps procurement
Safsale listings provide manufacturer part numbers, images, downloadable PDF datasheets and catalog pages, and product metadata such as coil voltage, contact configuration and amp rating. Buyers can use images to confirm enclosure style; download datasheets to validate electrical ratings, dimensions and operating limits; compare similar models side-by-side; and consult reviews and Q&A for field notes.
Sourcing, replacement and procurement language
When creating purchase orders or RFQs, include the exact Functional Devices part number and specify coil voltage, contact form, continuous amp rating, enclosure style and any option codes (LED, override switch). For in-place replacements, reference the original part number, hub size and mounting orientation and request the datasheet to confirm pilot-duty and mechanical life.
Functional Devices products are widely used by contractors, facilities teams and OEMs to reduce field labor and standardize spare inventories. Use the manufacturer datasheet and Safsale listing assets to confirm compatibility before ordering.
