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1771-QB | Allen-Bradley PLC-5 Closed-Loop Hydraulic Positioning Module
- Regular price
- $2,599.00
- Sale price
- $2,599.00
- Regular price
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Product Description P/N: 1771-QB
Description
The Allen-Bradley 1771-QB is a closed-loop hydraulic positioning module designed for precise servo control using magnetostrictive linear displacement transducers. Engineered for integration in PLC-5 1771 Universal I/O chassis, it delivers fast updates, advanced control algorithms, and high-resolution linear feedback for demanding hydraulic motion applications.
Technical Specifications
| Condition | New / Never Used Surplus |
| Part Number | 1771-QB |
| Manufacturer | Allen-Bradley |
| Category | PLCs / Machine Control |
| Subcategory | Specialty I/O Module |
| Application | Closed-loop hydraulic servo positioning |
| Axes Supported | 2 independent axes |
| Update Rate | 2 ms per loop |
| Control Functions | PID + Feedforward |
| Motion Capabilities | Position, velocity, acceleration changes on the fly |
| Velocity Smoothing | Yes, to reduce mechanical wear |
| Max Velocity Supported | 327.67 in/s (3.2767 m/s) |
| Units | Inch or metric |
| Diagnostics | Built-in |
| Simulation Mode | Yes (off-site testing) |
| Isolation | 1500V RMS (transient), optoelectronic |
| Chassis | 1771 Universal I/O, 1 slot |
| Thermal Dissipation | Typical 12 W (179 BTU/hr), max 18 W (278 BTU/hr) |
| Operating Temperature | 32–140°F (0–60°C) |
| Storage Temperature | –40–185°F (–40–85°C) |
| Relative Humidity | 5–95% non-condensing |
| Keying | Between 16–18, 30–32 |
| Sampling Period | 2 ms |
| Wiring Arm | 1771-WN (40 terminal) |
| Backplane Current | 1.6A max / 1.1A typ @ +5 VDC |
| Transducer Interface Power | +5 VDC ±5% @ 300 mA max |
| Analog Interface Power | +15 VDC ±5% @ 540 mA max; –15 VDC ±5% @ 360 mA max |
| Discrete Input Power | +15 to +24 VDC @ 50 mA max |
| Discrete Output Power | +30 VDC @ 400 mA max, max drop 1.6 V at 100 mA |
| Supported Transducers | Temposonics II, Balluff, Norstat magnetostrictive |
| Max Transducer Length | 180 in (4.572 m) |
| Transducer Resolution | Better than ±0.002 in over 180 in |
Information About 1771-QB
The Allen-Bradley 1771-QB is a PLC-5 specialty I/O module engineered for high-performance closed-loop hydraulic motion control. It supports two independent servo axes with a rapid 2 ms update rate, allowing precise real-time adjustments of position, velocity, and acceleration. Designed for direct interface with magnetostrictive displacement transducers and servo valves, the module provides PID and feed-forward control while offering velocity smoothing to extend mechanical life. All external connections are electrically isolated, supporting robust operation in electrically noisy environments. Built-in diagnostics, simulation modes, and flexible external power options further enhance system reliability, making the 1771-QB a proven solution for hydraulic servo applications requiring accuracy and durability.
Key Features:
- Dual-axis closed-loop control: independent, high-speed hydraulic servo control with a 2 ms update rate for precise real-time adjustments in demanding motion systems.
- Advanced PID + feed-forward control: supports proportional, integral, derivative, and feed-forward algorithms for highly accurate and responsive control behavior.
- Direct connection to linear transducers: interfaces directly with Temposonics II, Balluff, or Norstat magnetostrictive transducers with lengths up to 180 inches and resolution exceeding ±0.002 inches.
- Servo valve and drive output support: includes 12-bit resolution analog outputs for direct control of servo valves or motor controllers.
- Fully isolated external connections: 1500 V RMS isolation ensures noise immunity and safe operation across hydraulic, transducer, and control circuits.
- On-the-fly motion modification: allows position, velocity, and acceleration changes during operation, enabling adaptive and dynamic motion control.
- Built-in diagnostics and simulation: supports troubleshooting and off-site testing without connecting live hydraulic equipment.
- Flexible external power requirements: individual power inputs for transducer, analog, and discrete sections allow isolated or shared supplies depending on noise-immunity needs.
- High environmental resilience: operates from 0–60°C with wide humidity tolerance and supports industrial-grade wiring via 1771-WN terminal arm.
The 1771-QB delivers the reliability and precision required for closed-loop hydraulic servo positioning across a wide range of industrial automation environments.
Description
The Allen-Bradley 1771-QB is a closed-loop hydraulic positioning module designed for precise servo control using magnetostrictive linear displacement transducers. Engineered for integration in PLC-5 1771 Universal I/O chassis, it delivers fast updates, advanced control algorithms, and high-resolution linear feedback for demanding hydraulic motion applications.
Technical Specifications
| Condition | New / Never Used Surplus |
| Part Number | 1771-QB |
| Manufacturer | Allen-Bradley |
| Category | PLCs / Machine Control |
| Subcategory | Specialty I/O Module |
| Application | Closed-loop hydraulic servo positioning |
| Axes Supported | 2 independent axes |
| Update Rate | 2 ms per loop |
| Control Functions | PID + Feedforward |
| Motion Capabilities | Position, velocity, acceleration changes on the fly |
| Velocity Smoothing | Yes, to reduce mechanical wear |
| Max Velocity Supported | 327.67 in/s (3.2767 m/s) |
| Units | Inch or metric |
| Diagnostics | Built-in |
| Simulation Mode | Yes (off-site testing) |
| Isolation | 1500V RMS (transient), optoelectronic |
| Chassis | 1771 Universal I/O, 1 slot |
| Thermal Dissipation | Typical 12 W (179 BTU/hr), max 18 W (278 BTU/hr) |
| Operating Temperature | 32–140°F (0–60°C) |
| Storage Temperature | –40–185°F (–40–85°C) |
| Relative Humidity | 5–95% non-condensing |
| Keying | Between 16–18, 30–32 |
| Sampling Period | 2 ms |
| Wiring Arm | 1771-WN (40 terminal) |
| Backplane Current | 1.6A max / 1.1A typ @ +5 VDC |
| Transducer Interface Power | +5 VDC ±5% @ 300 mA max |
| Analog Interface Power | +15 VDC ±5% @ 540 mA max; –15 VDC ±5% @ 360 mA max |
| Discrete Input Power | +15 to +24 VDC @ 50 mA max |
| Discrete Output Power | +30 VDC @ 400 mA max, max drop 1.6 V at 100 mA |
| Supported Transducers | Temposonics II, Balluff, Norstat magnetostrictive |
| Max Transducer Length | 180 in (4.572 m) |
| Transducer Resolution | Better than ±0.002 in over 180 in |
Information About 1771-QB
The Allen-Bradley 1771-QB is a PLC-5 specialty I/O module engineered for high-performance closed-loop hydraulic motion control. It supports two independent servo axes with a rapid 2 ms update rate, allowing precise real-time adjustments of position, velocity, and acceleration. Designed for direct interface with magnetostrictive displacement transducers and servo valves, the module provides PID and feed-forward control while offering velocity smoothing to extend mechanical life. All external connections are electrically isolated, supporting robust operation in electrically noisy environments. Built-in diagnostics, simulation modes, and flexible external power options further enhance system reliability, making the 1771-QB a proven solution for hydraulic servo applications requiring accuracy and durability.
Key Features:
- Dual-axis closed-loop control: independent, high-speed hydraulic servo control with a 2 ms update rate for precise real-time adjustments in demanding motion systems.
- Advanced PID + feed-forward control: supports proportional, integral, derivative, and feed-forward algorithms for highly accurate and responsive control behavior.
- Direct connection to linear transducers: interfaces directly with Temposonics II, Balluff, or Norstat magnetostrictive transducers with lengths up to 180 inches and resolution exceeding ±0.002 inches.
- Servo valve and drive output support: includes 12-bit resolution analog outputs for direct control of servo valves or motor controllers.
- Fully isolated external connections: 1500 V RMS isolation ensures noise immunity and safe operation across hydraulic, transducer, and control circuits.
- On-the-fly motion modification: allows position, velocity, and acceleration changes during operation, enabling adaptive and dynamic motion control.
- Built-in diagnostics and simulation: supports troubleshooting and off-site testing without connecting live hydraulic equipment.
- Flexible external power requirements: individual power inputs for transducer, analog, and discrete sections allow isolated or shared supplies depending on noise-immunity needs.
- High environmental resilience: operates from 0–60°C with wide humidity tolerance and supports industrial-grade wiring via 1771-WN terminal arm.
The 1771-QB delivers the reliability and precision required for closed-loop hydraulic servo positioning across a wide range of industrial automation environments.