Schneider AEG AS-B824-100
1. Product Overview
The AS-B824-100 belongs to the AEG Modicon B824 Series and is specifically designed for control platforms including Modicon PLC, TSX, and Quantum systems. It features 16 independent True-High outputs, which maintain a 24 V DC high level when de-energized. This module is ideal for directly driving low-power loads such as lights, relays, and alarms, and can also control high-power equipment by connecting external power relays.
2. Key Technical Specifications
| Parameter |
Description |
| Rated Voltage |
24 V DC (True-High) |
| Number of Output Points |
16 points (independent per point) |
| Output Type |
True-High, 24 V DC high level when de-energized |
| Rated Output Current |
0.5 A per point |
| Maximum Load Power |
12 W per point |
| Wiring Method |
Screw terminal block, compatible with standard 24 V DC wiring specifications |
| Operating Temperature Range |
–20 °C to +60 °C |
| Protection Class |
IP20 (for indoor use only) |
| Dimensions |
Approximately 120 mm × 90 mm × 45 mm |
| Weight |
Approximately 0.35 kg |
| Compatible Platforms |
Modicon PLC (e.g., M340, Quantum, TSX) and other control systems supporting 24 V DC True-High output |
| Certifications |
CE, UL, CSA, and other international safety certifications |
3. Product Features
- True-High Output: Maintains 24 V DC high level in de-energized state, eliminating the need for external pull-up resistors and simplifying wiring.
- High Reliability: Equipped with silver alloy contacts that offer corrosion resistance and long service life, meeting the rigorous requirements of industrial field environments.
- Modular Design: Can be directly plugged into standard module chassis or guide rails, enabling quick replacement and maintenance.
- Strong Compatibility: Seamlessly integrates with Schneider AEG series PLCs, HMIs, and process control systems, supporting standard 24 V DC True-High signal protocols.
- Safety Certified: Complies with multiple international safety standards including CE, UL, and CSA, satisfying compliance requirements of global markets.
- Compact Size: Small footprint and lightweight design, suitable for installation in space-constrained control cabinets or enclosures.
4. Structure and Components
- Housing: Made of high-strength plastic or metal, providing mechanical protection with integrated screw holes for secure mounting.
- Terminal Block: Each output point is configured with an independent screw terminal, ensuring reliable and stable wiring connections.
- Internal Contacts: Silver alloy or copper alloy contacts are adopted to guarantee low contact resistance and extended service life.
- Internal Circuitry: Consists of driving transistors, protective diodes, and filter capacitors, forming a complete True-High output driving circuit.
- Markings: Each output point is clearly numbered from 1 to 16, facilitating easy mapping to corresponding points in PLC programming.
5. Typical Application Areas
- Industrial Automation: Driving indicator lights, alarms, and relays under PLC control.
- Process Control: Outputting start-stop signals for valve solenoids and pumping stations.
- Building Automation: Status indication for access control systems, fire alarm systems, and HVAC systems.
- Energy Systems: Condition monitoring and control of photovoltaic inverters and wind turbine generators.
- Packaging Machinery: Signal output for cylinders and sensors in packaging lines.
6. Installation and Maintenance Guidelines
Installation
- Mount the module on guide rails or in enclosures compliant with IEC 60204-1 standards.
- Securely fasten the terminal block to cables using screws to ensure excellent electrical contact.
- Verify that the power supply provides a stable 24 V DC output to prevent malfunctions caused by voltage fluctuations.
Wiring
- Connect the positive pole of each output directly to 24 V DC, and the negative pole (or common terminal) to the PLC’s output port.
- For high-power loads, it is recommended to connect power relays or contactors in parallel at the output terminals to protect the module.
Commissioning
- After power-on, use a multimeter to measure the voltage of each output point and confirm that it maintains 24 V DC in the de-energized state.
- Test the corresponding points in the PLC program and verify that the output switches to low level (0 V) or remains at high level as instructed.

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