
ASC77.2U Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $55.00 | Top Pick! Condition is New – Open box, Siemens ASC77.2U OpenAir Damper Actuator EAS External Auxiliary Switch Kit, shipping cost = $9.00 | 99.7% |
![]() | $47.50 | Condition is New – Open box, Siemens ASC77.2U-nos, shipping cost = $21.18 | 100.0% |
![]() | $87.00 | Top Pick! Condition is New – Open box, SIEMENS ASC77.2U / ASC772U (NEW IN BOX), shipping cost = $12.90 | 99.7% |
![]() | $89.54 | Condition is New – Open box, SIEMENS ASC77.2U / ASC772U (NEW IN BOX), shipping cost = $36.18 | 99.3% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $118.77 | Condition is New, SIEMENS ASC772U Building Technology EXTERNAL DUAL AUX SWITCH KIT, FREE SHIPPING | 98.6% |
![]() | $137.01 | Condition is New, Siemens Building Technology ASC77.2U EXTERNAL DUAL AUX SWITCH KIT, FREE SHIPPING | 99.7% |

The Siemens ASC77.2U OpenAir Damper Actuator EAS Switch Kit is a versatile and reliable solution for controlling the position of dampers in various HVAC applications. This kit is designed to work with the Siemens ASC77.2U OpenAir damper actuator and includes an Electronic Actuator Switch (EAS) for added functionality and convenience.
The damper actuator is a pneumatic actuator that operates on compressed air. It is designed to provide precise and accurate damper positioning, ensuring optimal indoor air quality and energy efficiency. The actuator features a rugged and corrosion-resistant stainless steel housing, making it suitable for use in harsh environments.
The EAS switch kit includes a wiring harness and a switch assembly. The switch assembly allows for easy selection of damper positioning modes, including proportional, on/off, and fail-safe. The switch also includes a built-in diagnostics feature, which allows for quick identification of any issues with the actuator or switch.
The wiring harness in the EAS switch kit is designed to simplify the connection process between the actuator and the building automation system. The harness includes color-coded wires and clear labeling, making it easy to identify and connect each wire to its corresponding terminal.
The Siemens ASC77.2U OpenAir Damper Actuator EAS Switch Kit is compatible with a wide range of building automation systems and is suitable for use in various HVAC applications, including commercial and industrial buildings, schools, and healthcare facilities. The kit is easy to install and requires minimal maintenance, ensuring long-term reliability and performance.
Overall, the Siemens ASC77.2U OpenAir Damper Actuator EAS Switch Kit is an essential accessory for any HVAC system that requires precise damper positioning control. Its rugged construction, ease of use, and compatibility with various building automation systems make it a top choice for facility managers and engineers looking for a reliable and versatile damper actuator solution.
Siemens ASC77.2U OpenAir Damper Actuator EAS Switch Kit is a pneumatic actuator designed for controlling damper systems in HVAC applications. Here are some pros and cons of buying this product:
Pros:1. Compatibility: This actuator is designed to work with Siemens OpenAir EAS (Electric Actuator System) and can be used as a pneumatic alternative in applications where a pneumatic actuator is preferred.
2. Versatility: The actuator is suitable for various damper sizes and can be used in both single and double-acting configurations. It can also be used in applications with high humidity or corrosive environments due to its OpenAir design.
3. Safety: The actuator comes with a safety limit switch that can be used to prevent damper movement beyond a certain point, ensuring safe operation.
4. Easy installation: The kit includes all necessary components for installation, making it a convenient option for contractors and engineers.
5. Durable: The actuator is built to withstand harsh environments and is made of high-quality materials, ensuring long-lasting performance.
Cons:1. Cost: The actuator may be more expensive than some other pneumatic damper actuators on the market.
2. Complexity: The actuator may require additional wiring and connections for use with the EAS system, adding to the installation time and cost.
3. Limited adjustability: The actuator does not offer a wide range of adjustability, which may limit its use in certain applications.
4. Requires air supply: The actuator requires a constant air supply to operate, which may add to the operational costs.
In conclusion, the Siemens ASC77.2U OpenAir Damper Actuator EAS Switch Kit is a high-quality, versatile, and durable option for controlling dampers in HVAC applications. Its compatibility with the Siemens OpenAir EAS system and safety features make it a popular choice among contractors and engineers. However, its cost and complexity may be a drawback for some users. Overall, if the added features and benefits outweigh the additional cost and complexity, then this actuator is a worthy investment for your HVAC project.
Recommendation:If you are looking for a reliable and versatile damper actuator for use in harsh environments and require compatibility with the Siemens OpenAir EAS system, then the Siemens ASC77.2U OpenAir Damper Actuator EAS Switch Kit is a great option to consider. However, if cost and complexity are major concerns, then you may want to explore other pneumatic damper actuator options on the market. Ultimately, it's important to weigh the pros and cons carefully and consult with a qualified HVAC professional to determine the best solution for your specific application.
Details:
New old stock Siemens ASC77.2U openair damper actuator eas external auxiliary switch kit.
specifications maxohvac:
- brand: Siemens
- mpn: Asc77.2u
- part type: Actuator Switch Kit
offer maxohvac:
- started: december 24, 2025
- options: ship-to-home
- availability: in stock
- sold #: 12
- best offers: true
- prices: $47.50–$137.01
- item condition:
- New – Open box
- New
- in stock #: 5
returns maxohvac:
- policy: no returns
shipping maxohvac:
- type: fixed
- service: economy
- transit: 3-7 days
- class: economy
seller maxohvac:
- rating: 99.7%
- city: belvidere, illinois
- # reviews: 6852
general maxohvac:
- category: Business & Industrial > Hvac Refrigeration
payments maxohvac:
- wallet: google-pay
- credit card: discover
- other
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