Siemens ASC77.2U specifications OpenAir External Auxiliary Switch, Product Description

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OpenAir™ External Auxiliary Switch

g

b

f

a

e

d

c

EA1175R1

Installation Instructions

Document No. 129-420

December 13, 2004

a.External dual auxiliary switch

b.Position indicator

c.GCA/GBB/GIB position adapter

d.GMA/GEB position adapter

e.3 mm hex key

f.Plastic mounting adapter inserts (2)

g.Threaded M5 × 25 screws (2)

Figure 1. External Auxiliary Switch Kit Contents.

Product Description

The OpenAir External Auxiliary Switch (EAS) provides switch functionality for standard model damper actuators with easy installation for in-service units.

Product Number

ASC77.2U

Warning/Caution Notations

WARNING:

 

Personal injury/loss of life

 

 

may occur if you do not follow

 

 

the procedures as specified.

CAUTION:

 

Equipment damage, or loss of

 

 

data may occur if you do not

 

 

follow the procedures as

 

 

specified.

Specifications

Dual Auxiliary Switches

AC rating

24 Vac to 250 Vac

AC 6A resistive

 

AC 2 FLA, 12 LRA

DC rating

12 Vdc to 30 Vdc

DC 2A

 

Insulation system

Double insulated

Switch range

 

Switch A

0° to 90° with 5° intervals

Recommended

0° to 45°

usage

 

Switch B

0° to 90° with 5° intervals

Recommended

45° to 90°

usage

 

Switching hysteresis

 

UL listed to UL 873

 

cUL certified to Canadian

 

Standard C22.2

Agency certification

No. 24-93

Electromagnetic

 

 

compatibility 89/336/EEC

 

Low voltage directive

 

73/23/EEC

Conduit Connection

Threaded 1/2-inch

 

NSPT, flex only

Shipping Weight

1.1 lb (0.48 kg)

Required Tools

Phillips screwdrivers

No. 2 for screws, No. 1 for adjustment

Expected Installation Time

15 minutes

Prerequisites

CAUTION:

Remove power from in-service damper actuator before installing external auxiliary switch.

WARNING:

Do not open the external auxiliary switch.

ASK75.3U or

ASK75.1U

EA1191R1

ASK75.3U

ASK75.1U

 

or

Figure 2. NEMA Type 3R Rating Only

With Use of Weather Shield.

Item Number 129-420, Rev. 010

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Contents Specifications OpenAir External Auxiliary SwitchExpected Installation Time Product DescriptionNew Actuators, Remove Pre-load InstallationRemoving Preload Preparing the Actuator Shaft AdapterPreparing the EAS for Mounting Mounting External Auxiliary Switch to ActuatorShort shaft applications Wiring Auxiliary SwitchesSetting the Switches Wiring DesignationSiemens Building Technologies, Inc Dimensions

ASC77.2U specifications

The Siemens ASC77.2U is a state-of-the-art automation and control system designed to meet the growing demands of industrial processes in various sectors. This advanced system is renowned for its reliability, scalability, and adaptability, making it a vital component for modern factories and plants.

One of the main features of the Siemens ASC77.2U is its modular architecture. This allows users to customize the system based on their specific requirements, facilitating seamless integration with existing equipment and processes. The modular design also enables easy upgrades and expansions, ensuring that the system remains relevant and efficient as technology evolves.

Furthermore, the ASC77.2U incorporates cutting-edge technologies that enhance its operational capabilities. One of its key technologies is the use of advanced communication protocols, enabling real-time data exchange between devices and the control system. This feature significantly improves process monitoring and control, allowing for quicker responses to changing conditions and ensuring optimal performance.

Another standout characteristic of the ASC77.2U is its robust security features. In an era where cyber threats are increasingly prevalent, Siemens has equipped the ASC77.2U with comprehensive security measures. These include encrypted data transmission, user access controls, and regular software updates to protect the system against potential vulnerabilities.

Additionally, the ASC77.2U supports various diagnostic and troubleshooting tools. These tools provide system operators and technicians with valuable insights into performance issues, allowing for prompt intervention and minimizing downtime. The user-friendly interface further enhances usability, enabling personnel to navigate and operate the system with ease.

Energy efficiency is also a significant focus of the ASC77.2U. It incorporates technologies that optimize power consumption, contributing to sustainability goals while reducing operational costs. The system's ability to monitor energy usage in real-time helps organizations identify areas for improvement and implement energy-saving measures effectively.

In summary, the Siemens ASC77.2U represents a pivotal advancement in industrial automation and control systems. Its modular design, advanced communication capabilities, robust security features, effective diagnostic tools, and energy efficiency focus make it a premier choice for organizations looking to enhance their operational performance. As industries continue to evolve, the ASC77.2U stands ready to support businesses in achieving their automation goals while fostering a sustainable future.