1771-QB/C Allen-Bradley Linear Positioning Module
$123.00
$320.00
Description
Allen-Bradley 1771-QB/C Linear Positioning Module
The Allen-Bradley 1771-QB/C, also cataloged as the 1771-QB Linear Positioning Module, operates as a dedicated hardware component for closed-loop axis positioning control within PLC-5 and 1771 I/O system platforms. The module processes displacement feedback signals and executes PID and feed-forward control algorithms for hydraulic, pneumatic, and servo actuator control loops.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1771-QB/C |
| Brand | Allen-Bradley |
| Origin | United States |
| Weight | 6.00 lbs |
| Dimensions | 115 x 317 x 160 mm |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 1.6 A maximum at 5 VDC backplane |
| Product Type | Linear Positioning Modules |
| Axes Supported | 2 independent axes |
| Update Rate | 2 ms per axis |
| Control Algorithms | PID, feed-forward, acceleration, velocity, derivative control |
| Analog Output Range | +/-10 VDC up to 10 mA; +/-20 mA up to 600 ohm; +/-50 mA up to 240 ohm; +/-100 mA up to 240 ohm |
| Analog Resolution | 12-bit |
| Discrete Outputs | Sourcing type, 100 mA maximum ON, 1.0 mA leakage OFF |
| Discrete Inputs | 8 mA at 12 VDC; 16 mA at 24 VDC |
| Logic Input Levels | Logic 0: 0-4 VDC; Logic 1: 10-30 VDC |
| Backplane Current | 1.1 A typical at 5 VDC; 1.6 A maximum at 5 VDC |
| Fuse Rating | 3 A, 250 V normal-blow |
| Wiring Arm | 1771-WN |
| Mounting | 1771 Universal I/O chassis |
| Enclosure Type | Open style |
Deterministic PLC-5 Motion Control Characteristics
The 1771-QB/C integrates with PLC-5 control architectures through the 1771 backplane interface and provides closed-loop position control for two independent motion axes. The module supports direct feedback connection from linear displacement transducers including MTS Temposonics, Balluff BTL, and Norstat GYRG devices.
The module supports industrial control signal processing with I/O density scaling through configurable analog and discrete channels. The control firmware executes PID and feed-forward calculations with a 2 ms update interval, allowing actuator command updates based on real-time position feedback.
The module provides analog output interfaces for hydraulic servo valves and servo motor controllers. Built-in diagnostics monitor transducer faults and positioning errors, while simulation modes allow control program verification without physical actuator movement.
Frequently Asked Questions
Q: How many motion axes can the 1771-QB/C control?
A: The module supports two independent closed-loop positioning axes.
Q: What backplane power requirement does the 1771-QB/C have?
A: The module requires 5 VDC backplane power with 1.1 A typical current consumption and 1.6 A maximum current consumption.
Q: Which feedback devices can be connected to the 1771-QB/C?
A: The module supports linear displacement transducers including MTS Temposonics, Balluff BTL, and Norstat GYRG series devices.
Field Installation Guidelines
Install the 1771-QB/C in a compatible 1771 Universal I/O chassis and verify available backplane current capacity before system startup. Use the specified 1771-WN wiring arm for field connections and confirm actuator, transducer, and signal wiring compatibility.
Separate analog feedback wiring from high-current actuator conductors to reduce electrical interference. Apply shield grounding practices according to cabinet grounding design, with cable shields terminated using appropriate industrial methods.
Verify transducer scaling, feedback polarity, and actuator output configuration during commissioning. Ensure hydraulic, pneumatic, or servo drive hardware is mechanically aligned before enabling closed-loop control.
Features
Minimum Order Quantity (MOQ)
We welcome bulk orders and have a minimum order quantity of just one unit.
Certificates and Documentation
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
Delivery Time
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
Payment Methods
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
Warranty
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Refund and Return Policy
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.
Featured
Complementary products
Express Delivery
Fast shipping for your urgent needs.
Large Inventory
Extensive stock ensures quick availability.
Premium Quality
Genuine, high-grade PLC & DCS components.
24/7 Customer Support
Reliable service for clients worldwide.