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Schneider AEG AS-S908-110
1. Overview
Schneider AEG AS-S908-110 is a low-voltage three-phase AC contactor manufactured by Schneider, compatible with the 6ES7972-0BB50-0XA0 module series. This contactor series is widely applied in industrial automation systems, suitable for motor control, lighting circuits and other scenarios requiring current isolation and on-off control.
2. Specifications
The key electrical specifications of this contactor are as follows:
- Rated current: 9A (rated operating current)
- Rated power: 0.75 kW
- Rated voltage: 380V/400V (standard three-phase industrial power supply voltage)
- Rated coil voltage: 110V (corresponding to the “110” marking in AS-S908-110, indicating the coil is driven by 110V voltage)
3. Product Features
- Compact design: This model features a relatively small size, ideal for control cabinets with limited installation space.
- High reliability: As an industrial-grade component, it has excellent anti-interference performance and a long service life design.
- Standardized module: It is compatible with the standard module interface of the 6ES7 series, facilitating wiring with Siemens S7-300/400 series PLCs.
4. Structure & Components
The main structural components of this contactor include:
- Main contact system: Undertakes the main operating current with excellent on-off performance.
- Auxiliary contacts: Generally equipped with normally open (NO) and normally closed (NC) contacts, which are used to provide status feedback signals to PLC or control auxiliary circuits.
- Coil: An electromagnetic component that generates magnetic field when energized, attracting the main contacts to close the circuit. This model is driven by 110V voltage.
- Shell: Protects internal components from dust and external impact.
5. Application Fields
This contactor is widely used in the following industrial fields:
- Motor control: For starting, stopping and reversing three-phase AC motors.
- Lighting control: For on-off control of high-power lighting circuits.
- Heating equipment: Controls the on-off of industrial heaters, hot air blowers and other similar equipment.
- Automation control systems: Serves as the output executive component of S7-300/400 series PLC control systems.
6. Installation & Maintenance
Installation
- This contactor is usually mounted on standard DIN rails to ensure stability.
- During wiring, strictly distinguish between main contacts (power side) and coil terminals (control side) to avoid wrong connection.
Maintenance
- Regular inspection: Check the wear of contacts, especially whether the main contacts have overheating or ablation.
- Cleaning: Keep the contactor shell clean to prevent dust from entering the interior.
- Coil inspection: Test whether the coil resistance is normal to avoid coil overheating or burnout.
- Auxiliary contacts: If auxiliary contacts (e.g., A-B 1756-ENBT or A-B 1756-L61/B) are used, regularly check their working status.
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