6AV6881-0AV21-0AA0 SIEMENS Power module

Description

6AV6881-0AV21-0AA0 SIEMENS Power module

Product Dimensions：

Product Description

The power module acts as the electrical foundation of a PLC rack or distributed I/O station. It converts standard industrial supply voltages into the specific internal voltages required by the backplane bus. Additionally, these modules often provide auxiliary power for field devices, ensuring that the control logic remains electrically isolated from the potentially noisy or unstable power used by heavy machinery.

Product Parameters

The technical specifications of these modules focus on conversion efficiency and load capacity:

• Input Voltage Range: Wide-range input support for standard AC voltages or DC battery/industrial supplies.

• Output Voltage: Regulated DC outputs designed specifically for the PLC backplane and peripheral power segments.

• Output Current: Rated capacity measured in Amperes, defining the maximum number of expansion modules the power unit can support.

• Efficiency Rating: High-efficiency conversion rates to minimize heat generation within the control cabinet.

• Mains Buffering: Integration of capacitors to bridge short-term power dips, ensuring the CPU can perform a controlled shutdown or ride through micro-interruptions.

Product Advantages

Integrating a dedicated power module into the automation architecture offers several benefits:

• System Stability: Protects sensitive electronics from line noise, voltage spikes, and electromagnetic interference present in the primary power grid.

• Galvanic Isolation: Provides a clear electrical separation between the primary supply and the internal control logic, preventing ground loops and equipment damage.

• Diagnostic Integration: Many modules feature status signaling via LEDs or integrated contacts that inform the controller of power health or overload conditions.

• Compact Integration: Designed to match the form factor of the PLC series, allowing for seamless mounting on standard rails without additional wiring complexity.

Usage Precautions

To ensure the safety of the entire automation system, the following precautions must be followed:

• Load Calculation: Users must calculate the total current consumption of all modules on the rack to ensure it does not exceed the power module’s rated output.

• Polarity Protection: Ensure correct wiring of the input terminals, as reversed polarity can damage the module or trip external protective devices.

• Ventilation: Power modules generate heat during voltage conversion; they must be installed with the recommended clearance to allow for heat dissipation.

• Fusing: Appropriate external circuit breakers or fuses should be installed on the primary side to protect against short circuits in the supply line.

Product Applications

Power modules are a requirement in any modular automation setup to ensure electrical consistency:

• Centralized Control Cabinets: Providing the primary power source for the main PLC rack and its local expansion modules.

• Distributed I/O Stations: Powering remote interface modules and their associated sensors in localized equipment panels.

• High-Availability Systems: Used in redundant power configurations where two modules work in parallel to ensure the system remains active if one power source fails.

• Critical Process Monitoring: Supporting systems that require stable power for sensitive analog measurements and high-speed data logging.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Please make an inquiry for more models：