1336-PB-SP21B ALLEN BRADLEY Power module

Description

1336-PB-SP21B ALLEN BRADLEY Power module

Product Dimensions：

Product Description

The 1336-PB-SP21B serves as a critical internal circuit board responsible for managing the initial power-up sequence of high-power AC drives. Its primary function is to control the “precharge” process, which limits the inrush current flowing into the DC bus capacitors when the drive is first energized. This prevents damage to the bridge rectifier and capacitors, ensuring the longevity and stability of the drive’s power architecture.

Product Parameters

• Manufacturer: Rockwell Automation / Allen-Bradley

• Part Number: 1336-PB-SP21B

• Component Type: Precharge Circuit Board (Spare Part)

• Compatibility: 1336 PLUS (S), PLUS II (F), IMPACT (GX), and FORCE (TE) Series

• Voltage Range: Typically used in drives rated for 460V to 600V AC (Frame C and D sizes)

• Function: Inrush current limiting and DC bus monitoring

• Mounting: Internal chassis mount

Product Advantages

• System Protection: Effectively manages high-energy surges during startup, significantly reducing mechanical and electrical stress on internal components.

• OEM Reliability: As an authentic Allen-Bradley part, it ensures 100% compatibility with existing 1336 series hardware, maintaining the UL/CE certifications of the drive.

• Plug-and-Play Integration: Designed for direct replacement, minimizing downtime during maintenance or repair cycles.

• Durability: Built with industrial-grade components to withstand the heat and electromagnetic interference (EMI) typical in motor control centers.

Important Considerations and Safety

• High Voltage Danger: Before installation, ensure all input power is disconnected. Wait at least 5 to 10 minutes for the DC bus capacitors to discharge to a safe voltage (under 50V DC) before opening the drive.

• ESD Sensitivity: This board contains Static Sensitive Devices. Use an anti-static wrist strap and follow proper grounding procedures during handling to avoid “silent” damage to the micro-circuitry.

• Correct Identification: Verify that your drive’s frame size and horsepower rating match the specifications for the SP21B series. Using an incorrect precharge board can lead to catastrophic failure upon power-up.

• Professional Installation: Replacement should only be performed by qualified personnel familiar with Variable Frequency Drive (VFD) repair and safety protocols.

Product Applications

The 1336-PB-SP21B is utilized wherever 1336 series drives are installed in heavy industrial environments, including:

• Water Treatment: Controlling high-capacity pumps and filtration systems.

• Material Handling: Managing conveyors and sorting systems in logistics hubs.

• Manufacturing: Powering fans, blowers, and mixers in chemical or food processing plants.

• Mining and Metals: Driving heavy-duty crushers and mill applications that require robust power management.

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

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