1746-QV Allen Bradley

Description

Product Name: 1746-QV Allen Braley Processor module

Product details:

The Allen-Bradley 1746-QV is an Open Loop Velocity Control module designed for the SLC 500 series PLC platform. It is a specialized intelligent I/O module used to bridge the gap between digital control and analog motion requirements.

Below is a detailed breakdown of the 1746-QV module.

Product Description

The 1746-QV module provides two independent channels of Open Loop Velocity Control. It translates digital data from the SLC processor into a highly precise bipolar analog output (typically \pm 10V DC). This signal is commonly used to command the velocity of variable speed drives, such as AC/DC drives or hydraulic proportional valves, without requiring feedback directly to the module.

Technical Specifications

Key Product Advantages

• High Performance: Provides rapid response times (1ms update), making it much faster than standard analog output modules for motion-specific tasks.
• Dual Channel Independence: Both channels operate independently, allowing for the control of two separate drives or valves from a single slot.
• Simplified Integration: Designed specifically for the SLC 500 backplane; it uses standard block transfers or I/O mapping for easy programming in RSLogix 500.
• Cost-Effective: Ideal for applications where full closed-loop servo control (which requires expensive encoders and complex PID tuning) is not necessary, but precise velocity control is.

Important Considerations & Precautions

Note: The 1746-QV is an open-loop module. It does not have inputs for encoders or tachometers. Any “closing of the loop” must be handled by the PLC processor or a separate feedback module.

1. Noise Mitigation: Use shielded twisted-pair cable for all analog signals to prevent electromagnetic interference (EMI) from affecting the velocity command.
2. Proper Grounding: Ensure the shield is grounded at only one end (typically at the PLC rack) to avoid ground loops.
3. Slot Placement: While it can be placed in any available slot, avoid placing it immediately adjacent to high-voltage AC I/O modules to reduce signal noise.
4. Legacy Status: The SLC 500 series is largely in “Active Mature” or “Discontinued” phases. Ensure you have a plan for long-term spare parts availability.

Product Applications

The 1746-QV is best suited for applications requiring smooth acceleration and deceleration of motors or fluid power systems:

• Conveyor Systems: Managing the speed of long-haul belts to prevent product toppling.
• Hydraulic Control: Controlling proportional valves in presses or injection molding machines.
• Material Handling: Coordinating the velocity of multiple motors in a sorting facility.
• Spindle Control: Providing speed references to VFDs (Variable Frequency Drives) in basic machining or winding applications.

Advantages: Foxboro, OVATION, TRICONEX, Allen-Bradley, ABB, Motorola, Siemens Moore, Ge Fanuc, Woodward, Bently Nevada and other major import brands!

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Colour：new Warranty: 12 months
Lead Time：3-day working day Country of origin: Sweden
Price: Please contact us Product weight：0.515kg
Shipping Port: Xiamen, China
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