Johnson Controls TS-470 Switch

The Johnson Controls TS-470 is a high-precision damper position switch engineered to provide millisecond-accurate feedback in Building Automation Systems (BAS) and commercial HVAC networks. This SPDT rotary switch is factory-mounted on a 1/2 inch damper crank arm, allowing for direct installation onto horizontal damper shafts without the need for custom linkages. Utilizing an encapsulated mercury switch mechanism, the unit is rated for 2A at 120 VAC or 1A at 240 VAC, ensuring reliable damper status indication for air handling units (AHU) and rooftop units (RTU).

For technicians performing cross-reference replacements, the TS-470 is functionally identical to the Kele KEL-SP100 and TS-470-2 models. It features a simplified 3-wire color-coded cable (Green: Common, Black: N.C., White: N.O.) that facilitates rapid wiring in the field. The switch logic is optimized for horizontal mounting; contacts remain in their normal state when the cable end is horizontal or above and trigger when the arm drops more than 15 degrees below horizontal, providing a robust solution for HVAC mechanical limits and airflow verification.

• Universal Compatibility: Mounts directly to standard 1/2" damper shafts for seamless integration with existing mechanical linkages.
• Enhanced Durability: The encapsulated mercury switch design protects internal components from dust and moisture, ensuring long-term repeatability in demanding duct environments.
• Verified Position Feedback: Provides definite "Open/Closed" confirmation to the controller, preventing energy loss caused by stuck or misaligned dampers.
• Simple Technical Integration: Standard SPDT 3-wire configuration works with nearly all major BAS controllers and safety interlock circuits.
• Proven Reliability: Operates efficiently across a wide temperature range of -30?F to 130?F (-34?C to 54?C).

How do I wire the TS-470 for Normally Open (N.O.) operation?
Use the Green (Common) and White (Normally Open) wires. The circuit will close once the damper arm drops more than 15 degrees below the horizontal axis.

Can the TS-470 be used on a 1-inch shaft?
No, this specific model is designed for a 1/2 inch shaft. For 1-inch applications, the TS1-470 series is required to ensure proper fitment and torque transfer.

What is the maximum current this switch can handle?
The non-plenum TS-470 is rated for a maximum of 2 Amps at 120 VAC. Exceeding this rating can damage the internal encapsulated switch.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.