GE 8724-CA-PS

1. Product Overview

The GE 8724-CA-PS is a high-performance power supply module designed by GE Fanuc, a subsidiary of General Electric (GE), specifically for the Series 90-70 PLC system. Serving as the core energy supply unit for the entire PLC rack, this module is responsible for converting the AC main power into stable DC power (such as +5VDC) required by the system backplane. It provides clean and reliable power support for all components installed on the rack, including CPU modules, various I/O modules, and communication modules. Its design is perfectly integrated into the Series 90-70 platform, and its outstanding stability and strong output capability ensure the continuous and uninterrupted operation of large-scale and complex control systems.

The GE 8724-CA-PS power supply module supports a wide range of AC input voltages, which can effectively adapt to on-site power grid fluctuations. Through its internal high-efficiency conversion circuit and multi-stage filtering design, it suppresses electrical noise and transient interference, significantly improving the anti-interference capability and reliability of the entire automation system. Typically equipped with status indicator lights, the module enables real-time monitoring of the power supply's operating status, providing an intuitive basis for preventive maintenance. In automation systems, its core value lies in offering a rock-solid power foundation for critical control tasks. It is an indispensable basic component for building high-availability control solutions, and is particularly suitable for fields with extremely high requirements for system stability, such as power, metallurgy, and water treatment.

2. Product Specifications

• Product Model: 8724-CA-PS
• Manufacturer: General Electric (GE)
• Product Type: Power Supply Module
• Applicable System: Series 90-70 PLC
• Input Voltage: 120/230V AC (auto-switching), 50/60Hz
• Output Voltage: +5.1V DC (logic power supply)
• Output Current: 10A (@ +5.1V DC)
• Output Power: 51W
• Hold-Up Time: Typically 20ms (after input power failure)
• Efficiency: > 70%
• Operating Temperature: 0°C to 60°C
• Storage Temperature: -40°C to 85°C
• Mounting Method: Horizontally installed in the dedicated power supply slot on the left side of the Series 90-70 rack
• Safety Certifications: UL, cUL, CE certifications

3. Structure and Composition

• Input filter circuit: Used to suppress electromagnetic interference (EMI) from the power grid.
• Rectifier bridge and filter capacitor: Convert AC input to DC.
• High-frequency switching converter (applying switching power supply technology): As the core voltage conversion unit, it is responsible for efficiently converting high-voltage DC to stable low-voltage DC.
• Output filter circuit: Ensures the purity and stability of the output DC power.
• Monitoring and protection circuit: Continuously monitors the output voltage and current. In case of overcurrent, overvoltage, or overheating, it immediately takes protective measures and shuts down the output to ensure the safety of the subsequent PLC modules.

4. Key Features and Advantages

4.1 High Reliability and Stability

4.2 Strong Output and Load Capacity

4.3 Comprehensive Protection Functions

4.4 Easy Installation and Maintenance

5. Application Fields

• Power industry (e.g., auxiliary control systems for thermal power plants and hydropower stations)
• Metallurgy industry (e.g., rolling mill lines and blast furnace control systems)
• Water treatment and sewage treatment plants (e.g., pump station control and filtration backwash control)
• Oil and natural gas pipeline transportation (SCADA systems)
• Large-scale manufacturing industry (e.g., automobile production lines and material handling systems)

7. Installation and Maintenance

Pre-Installation Preparation

1. Confirm that the total system power supply is completely turned off and implement the Lockout-Tagout (LOTO) procedure.
2. Check whether the rack's power supply slot and connectors are in good condition, with no dust or foreign objects.
3. According to the on-site power supply conditions, confirm that the input voltage (120VAC or 230VAC) matches the module's settings and wiring method.
4. Prepare appropriate wires and tools.

Maintenance Recommendations

1. Conduct regular inspections: Observe whether the status indicator light on the front panel shows a steady green "Power OK" (normal status) and listen for any abnormal buzzing sounds during operation.
2. Keep the module's air vents clean to ensure good heat dissipation.
3. Regularly check the tightness of the input and output terminals to prevent overheating caused by loose connections.
4. During system shutdown for maintenance, use a multimeter to measure whether the output voltage is within the rated range (+5.1VDC) to determine if its performance has degraded.
5. When the fault indicator light is on, first check whether there are abnormalities such as short circuits in the subsequent load. After confirming the fault source, consider replacing the power supply module.

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