The Allen-Bradley 1746-QV is a single-axis motion control module engineered for the SLC 500 controller series. This module provides open-loop velocity control, specifically optimized for managing hydraulic and pneumatic actuators. By integrating feedback from a Linear Displacement Transducer (LDT) with motion profiles defined within the SLC processor, the 1746-QV enables smooth, repeatable motion sequences without the complexity of a full closed-loop servo system.
Features
Single-axis motion control for hydraulic or pneumatic systems.
Supports integration with Linear Displacement Transducers (LDT) for precise position feedback.
Programmable motion profiles allowing up to seven distinct voltage levels for acceleration and deceleration.
Mitigates mechanical stress and hydraulic pressure spikes through controlled ramp-up and ramp-down sequences.
Optimized for integration within the standard SLC 500 I/O chassis architecture.
Applications
This module is frequently utilized in industrial machinery where controlled, profiled motion is required to improve cycle efficiency and hardware longevity. Common applications include:
Hydraulic presses (non-CNC)
Die casting equipment
Industrial welding machinery
General-purpose linear actuator speed control
Technical Specifications
Brand
Allen-Bradley
Product Line
SLC 500
Module Type
Open-Loop Velocity Control
Number of Axes
1
Input
1 x Linear Displacement Transducer (LDT)
Analog Output
-10 to +10V DC
Update Time
2 ms
Backplane Current (5V DC)
215 mA
Operating Temperature
0 to 60 degC (32 to 140 degF)
Storage Temperature
-40 to 85 degC (-40 to 185 degF)
Relative Humidity
5% to 95% (non-condensing)
Installation Guidelines
Ensure the SLC 500 backplane is powered down before inserting or removing the 1746-QV module to prevent electrical damage.
The module should be installed in a clean, dry environment within the specified temperature range.
Use shielded cabling for LDT connections to minimize electromagnetic interference (EMI) and ensure signal integrity.
Maintain proper grounding practices for the chassis to ensure robust operation.
Handle the module using ESD-safe procedures to protect sensitive internal circuitry.
FAQ
Q: Can the 1746-QV be used for closed-loop servo applications? A: No, the 1746-QV is specifically designed for open-loop velocity control applications. It is intended for systems where motion profiles are managed via LDT feedback rather than high-speed closed-loop servo synchronization.
Q: What is the primary function of the seven voltage levels? A: The seven programmable voltage levels allow the user to define discrete acceleration and deceleration segments within a motion profile, facilitating smoother transitions and reducing mechanical wear on the hydraulic or pneumatic components.
