In industrial and commercial safety, "fail-safe" is the most important term. The Honeywell S2024-2POS-SW2 is a spring return actuator, meaning it uses a powerful internal spring to drive a dampener or valve to a safe position (fully open or fully closed) in the event of a power loss. This makes it an indispensable component in fire and smoke management systems, where maintaining air integrity during an emergency is vital.
The "2POS" in the part number indicates two-position operation, meaning the actuator is either fully energized or fully relaxed. The "SW2" suffix denotes the presence of two internal auxiliary switches. These switches provide dry-contact feedback to the Building Management System (BMS), confirming whether the dampener has successfully reached its end-of-travel position. This feedback loop is essential for automated safety audits and system readiness checks.
Operating on a standard 24 VAC/DC supply, the S2024 series provides substantial torque (typically 175 lb-in or more) to overcome the friction of large air dampeners. Despite its power, the S2024-2POS-SW2 is designed for quiet operation and low power consumption while in the "holding" state. This efficiency reduces the load on the system's power supplies and lowers overall energy costs for the facility.
Fire and smoke dampener actuators are often located in ceiling voids or mechanical rooms where temperatures can vary. The Honeywell S2024-2POS-SW2 features a rugged aluminum housing that protects the internal motor and gear train from dust and humidity. It is rated for high-temperature exposure, ensuring that in the event of a fire, the actuator remains functional long enough to perform its safety-critical stroke.

Installation is simplified through a self-centering shaft adapter, which allows the actuator to be mounted on a wide variety of dampener shaft sizes. The wiring compartment is easily accessible, and the auxiliary switches are field-adjustable, giving technicians the flexibility to set the exact point at which the feedback signal is triggered. Because it is a direct-coupled actuator, there are no linkages to wear out, significantly reducing maintenance requirements.
The S2024-2POS-SW2 is UL listed and meets the requirements for smoke dampener actuators as defined by UL555S. When integrated with Honeywell's FS90 or XLS series fire alarm panels, it forms part of a cohesive safety strategy. For engineers designing life-safety systems, the S2024-2POS-SW2 offers the reliability and documented performance required to meet modern building codes.



