PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-QB is a dual-axis linear positioning module for the 1771 platform. It mounts in a single slot of a 1771 Universal I/O chassis. The module controls servo valves, proportional hydraulic valves, or electrical servos. It executes Proportional, Integral, Derivative, and Feed-forward positioning algorithms. Each motion axis operates with a fast update period of 2 milliseconds. The unit monitors position, velocity, servo error, and hydraulic system performance.
This module connects directly to MTS Temposonics II, Balluff BTL, or Norstat linear displacement transducers. It supports maximum stroke lengths up to 180 inches or 4.572 meters. Transducer resolution reaches plus or minus 0.002 inches across full travel. The system supports axis linear velocities up to 327.67 inches per second. Seven discrete inputs and two digital outputs are provided per axis for machine control.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Category | PLCs |
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| Product Line | PLC 5 |
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| Weight | 3.00 lbs (1.36 kg) |
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| Backplane Current | 1.6A (max), 1.1A (typical) at 5VDC |
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| Module Type | Linear Positioning Module |
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| Terminal Block | 40 Terminal 1771-WN |
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| Conductors | Conductors Wire Size: 14 gage stranded, (max), 3/64ths inch insulation (max) |
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| Module Location | 1771 Universal I/O chassis |
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| Positioning Transducer | MTS Temposonics Linear Displacement Transducer; Balluff BTL Linear Displacement Transduce; Norstat GYRG Linear Displacement Transducer |
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| Sampling Period | 2 ms |
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| Analog output resolution | 12-bit |
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| Analog Outputs | +/-10V dc up to 10 mA +/-20 mA up to 600ohms +/-50 mA up to 240 ohms +/-100 mA up to 240 ohms |
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| Discrete Outputs | Single-ended, sourcing outputs 100 mA, maximum source drive (ON state) 1.0 mA, maximum source leakage (OFF state) Logic 0: No voltage applied to output (low) Logic 1: User supplied voltage applied to output (high) |
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| Discrete Inputs | 8 mA/input (at 12 V DC), 16 mA/input (at 24 V DC), Logic 0: 0-4 V DC Logic 1: 10-30 VDC |
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| Inputs | Auxiliary Digital: 8 mA/input (at 12 V DC), 16 mA/input (at 24 V DC), 0-4 V DC Logic 0, 10-30 V DC Logic 1 Transducer |
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| Outputs | Auxiliary Digital, Digital Source; Servo Valve, Analog +/- 10 V DC, +/- 20 mA, +/- 50 mA, +/- 100 mA |
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| Slots | 1 Slot |
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| Module Update Period | 2 ms/axis |
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| Wiring Arm | 1771-WN |
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| Frequency | 47-63 Hertz |
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| Fuse | 3 Amperes, 250 Volts, Normal-Blow |
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| Cabling | 1771-PSCC Remote 5.5 ft |
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| Location | Stand-Alone |
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TECHNICAL INFORMATION
Features
- Provides two independent axes of closed-loop motion control within one chassis slot.
- Executes PID and feed-forward control algorithms with a 2 millisecond sampling period.
- Delivers 12-bit analog outputs with voltage and multiple current loop ranges.
- Connects directly to Temposonics II, Balluff BTL, and Norstat linear displacement transducers.
- Features seven discrete inputs and two digital outputs for each independent axis.
- Performs real-time monitoring of axis position, velocity, valve output, and positioning errors.
TECHNICAL INFORMATION
Applications
- Linear position control and monitoring of a tool or workpiece along one or two axes.
- Flow control of hydraulic fluid into or out of hydraulic cylinders via servo valves.
- Hydraulic system performance monitoring using linear displacement transducer feedback.
- Operation of proportional hydraulic valves and electrical servos.
TECHNICAL INFORMATION
Connections / Interfaces
- Direct transducer interface for MTS Temposonics II, Balluff BTL, and Norstat linear displacement transducers.
- Terminal connections use the 40-terminal 1771-WN wiring arm.
- Supports optional 1771-PSCC remote cabling with 5.5 feet of length.
- Analog servo valve outputs provide plus or minus 10 Volts DC or multi-range current loops.
- Discrete inputs include Hardware Start, Hardware Stop, Jog Forward, Jog Reverse, and Auto/Manual Selector.
- Discrete outputs include In-position and Loop Fault digital signals.
TECHNICAL INFORMATION
Installation Guidelines
- Disconnect all power sources before installing or removing the module from the chassis.
- Mount the module into a single slot of a 1771 Universal I/O chassis.
- Wire field devices to the 40-terminal 1771-WN wiring arm.
- Use 14 AWG stranded wire maximum with up to 3/64-inch insulation thickness.
- Operate the unit within an ambient temperature range of -25 to 60 degrees Celsius.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure PID and feed-forward control algorithms for each active motion axis.
- Select analog output ranges of plus or minus 10 Volts or 20, 50, or 100 milliamperes.
- Assign hardware start, stop, and jog input signals for axis operation.
- Enable internal module diagnostics for position, velocity, and loop fault tracking.
TECHNICAL INFORMATION
Compatibility
- Allen-Bradley 1771 Universal I/O chassis systems.
- Allen-Bradley PLC-5 programmable logic controller platform.
- MTS Temposonics II linear displacement transducers.
- Balluff BTL and Norstat GYRG linear displacement transducers.
TECHNICAL INFORMATION
Compliance and Certifications
- Tested to meet European Directive 73/23/EEC Low Voltage Directive.
- Complies with EN 61131-2 Programmable Controllers Equipment Requirements and Testing.
- Suitable for use in Class I, Division 2, Groups A, B, C, and D locations.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSAllen-Bradley 1771 Universal I/O chassis systems. Allen-Bradley PLC-5 programmable logic controller platform. MTS Temposonics II linear displacement transducers. Balluff BTL and Norstat GYRG linear displacement transducers.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What is the primary function of the Allen-Bradley 1771-QB module?
It controls and monitors linear position for one or two axes using servo valves or electric servos.
Which transducers interface directly with the 1771-QB module?
It connects directly to MTS Temposonics II, Balluff BTL, and Norstat linear displacement transducers.
What wiring arm does the 1771-QB use for field wiring?
The module uses the 40-terminal 1771-WN wiring arm for field conductor terminations.
What is the reference price for the 1771-QB module?
Observed market reference pricing is approximately $1,179.00 USD. This is an indicative market reference only and not a final quotation.
