Johnson Controls S500AA-1 HVAC Staging Module 24VAC 50/60Hz

Johnson Controls S500AA‑1 is a solid‑state HVAC staging module designed to sequence and control multiple heating or cooling stages, providing reliable load management and system coordination in commercial and industrial HVAC applications. Technical specifications Manufacturer: Johnson Controls Manufacturer part number: S500AA‑1 Product type: HVAC staging module Control function: Multi‑stage sequencing and control Power supply: 24 VAC Power frequency: 50/60 Hz Control voltage rating: 24 VAC nominal Relay outputs: Solid‑state relay pack outputs Number of stages: Multiple stages (model‑dependent, typically up to 6) Relay contact rating: Pilot duty, for driving contactors or relay packs Input type: Low‑voltage thermostat and control signals Output type: Switched low‑voltage control outputs Indicator type: LED status indicators for stage operation Mounting type: Panel mount Enclosure material: Molded plastic housing Wiring connection: Screw terminal blocks Operating temperature range: 0 °C to +50 °C (typical HVAC control range) Storage temperature range: −40 °C to +70 °C Application use: Commercial HVAC systems, boilers, chillers, rooftop units, staged heating and cooling systems System compatibility: Johnson Controls HVAC control systems and compatible 24 VAC control circuits Installation environment: Indoor, dry location Certifications: UL Listed, CSA Certified (typical for Johnson Controls staging modules) Country of manufacture: United States Please review pictures carefully and let us know if you have any questions!