RXA21.1/FC-02 SIEMENS Power module

Description

RXA21.1/FC-02 SIEMENS Power module

Product Dimensions：

Product Description

Siemens power modules are engineered to convert standard industrial line voltages into the specific DC voltages required by the controller’s backplane. Unlike general-purpose external power supplies, these modules are often designed to integrate directly into the physical rail system of the PLC, matching the form factor and aesthetic of the CPU and I/O modules. They act as a buffer against fluctuations in the primary power grid, providing filtered, short-circuit-proof, and regulated power. Depending on the system architecture, they can provide power to the internal system bus (backplane) or provide load current for field-side sensors and actuators.

Product Parameters

The technical profile of a power module focuses on energy conversion efficiency and protective thresholds:

• Input Voltage Range: Wide-range inputs typically supporting 120/230V AC or 24V DC, allowing for global deployment.

• Output Voltage: Precisely regulated output, most commonly 24V DC or specific backplane voltages required by the CPU.

• Current Rating: Rated output current capacity (e.g., 2A, 5A, 10A) which determines how many expansion modules the unit can support.

• Efficiency: High energy efficiency ratings, often exceeding 90%, to minimize heat generation within the control cabinet.

• Mains Buffering: The ability to maintain output voltage for a specific duration (in milliseconds) during brief power dips or interruptions.

• Isolation: High dielectric strength between the primary input and secondary output circuits for safety and noise immunity.

Product Advantages

• System Compatibility: Designed with the same mechanical and electrical standards as the rest of the Siemens automation family, ensuring a perfect fit and simplified mounting.

• Robust Protection: Integrated electronic protection against overloads, short circuits, and overvoltage, which prevents a single component failure from damaging the entire PLC rack.

• Diagnostic Integration: Many modules feature status LEDs or signaling contacts that notify the controller or maintenance staff of power health or faults.

• High Reliability: Optimized for 24/7 industrial use with high Mean Time Between Failures (MTBF) even in environments with vibration or temperature swings.

• Clean Power Delivery: Advanced filtering suppresses electromagnetic interference (EMI) from the mains, ensuring the stability of high-speed data processing in the CPU.

Important Considerations

• Load Calculation: It is critical to calculate the total power consumption of all connected modules to ensure the power module is not operating at its maximum limit, which can reduce its lifespan.

• Heat Dissipation: Although efficient, power modules generate heat; sufficient clearance must be provided above and below the module for natural convection cooling.

• Redundancy Planning: For mission-critical applications, consider using redundancy modules to allow for a backup power source in case of a primary module failure.

• Proper Grounding: The module must be correctly bonded to the protective earth (PE) to ensure safety and to maximize the effectiveness of the internal EMI filters.

• Inrush Current: Be aware of the inrush current during startup, which may require specific circuit breaker types (e.g., Type C or D) to prevent nuisance tripping of the main supply.

Product Applications

• Centralized Control Cabinets: Providing the primary logic power for PLCs and HMIs in standard industrial machinery.

• Distributed I/O Stations: Powering remote interface modules and their associated input/output slices in large-scale plant architectures.

• Automated Production Lines: Ensuring stable power for controllers managing high-speed assembly, where power fluctuations could cause data corruption.

• Process Automation: Supplying reliable energy to controllers in chemical or water treatment facilities where continuous operation is mandatory.

• Building Technology: Supporting controllers for large-scale HVAC, lighting, and access control systems in commercial infrastructure.

Shipping Port: Xiamen, China

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