GT2-71D Keyence GT2 Series High Accuracy Digital Contact Sensor Amplifier
GT2-71D is a high accuracy digital contact sensor amplifier unit from the Keyence GT2 series. It mounts on a DIN rail. It outputs pulse signals through a differential line driver. The unit suits precise position and displacement feedback in industrial automation.
This amplifier works with GT2 series sensor heads. It gives stable measurement for inspection, positioning and assembly lines. The pulse output supports EIA-422 compliant differential square waves. This helps keep signal quality high in noisy factory environments.
Why Buy From Oiltech Controls?
- 15+ years in industrial automation spare parts.
- Worldwide shipping support for urgent needs.
- Tested surplus and refurbished options available.
- 12-month warranty on eligible products.
- Technical check before every shipment.
- Support for obsolete control systems.
Technical Specifications
| Brand | Keyence |
| Model | GT2-71D |
| Series | GT2 series |
| Type | High accuracy digital contact sensor pulse output amplifier unit |
| Mounting | DIN rail mount |
| Pulse resolution | Selectable 0.1 / 0.5 / 1 / 10 µm (factory 0.5 µm) |
| Minimum phase difference | Selectable 0.5 / 2.5 / 5 / 25 µs (factory 2.5 µs) |
| Output signal | 90° phase difference differential square wave, EIA-422 compliant, +5 V line driver |
| Control input | Origin return no-voltage input, 20 ms min. |
| Supply voltage | 10 to 30 VDC, ripple p-p 10 percent included, Class 2 |
| Power consumption | Supplied by main unit GT2-100N or GT2-100P |
| Operating temperature | -10 to +50 °C, no freezing |
| Relative humidity | 35 to 85 percent RH, no condensation |
| Weight | Approx. 110 g including power supply cable |
| Communication | No built-in port. No protocol. Expansion via optional GT2 series communication units. |
Installation Guide
- Mount the unit on a standard DIN rail.
- Connect the sensor head to the amplifier input.
- Wire the pulse output to an EIA-422 compatible counter or controller.
- Use the origin return input for zero position recovery.
- Keep cables away from high power lines.
- Check supply voltage before power on.
Commissioning and Maintenance
- Set pulse resolution to match your controller.
- Set minimum phase difference for stable counting.
- Run origin return after installation.
- Clean the sensor head and rail area regularly.
- Check cable shielding for noise issues.
- Verify output waveform if counts look unstable.
Compatibility
- Works with GT2 series sensor heads.
- Needs main unit GT2-100N or GT2-100P for power.
- Supports optional GT2 series communication units.
- Pulse output fits EIA-422 differential inputs.
Typical Applications
- Position feedback on assembly machines.
- Displacement checks in inspection stations.
- Thickness and height measurement.
- Automated gauging and sorting lines.
- Obsolete control system upgrades.
Diagnostic Capability
- Pulse output supports waveform checks.
- Origin return input helps verify zero position.
- Phase difference setting helps match controller timing.
- Stable differential signal reduces noise errors.
Certification and Packaging
- Certification information not available in current source data.
- Package includes the GT2-71D unit.
- Power supply cable included per weight note.
- Please confirm accessory list before order.
Warranty and Shipping
- 12-month warranty on eligible products.
- Shipping by FedEx, UPS and DHL.
- Global shipment support.
- Technical verification before shipment.
FAQ
Q: What is the GT2-71D?
A: It is a Keyence GT2 series pulse output amplifier unit for digital contact sensors.
Q: What output does it use?
A: It uses 90 degree phase difference differential line driver output, EIA-422 compliant, +5 V.
Q: What is the pulse resolution?
A: You can select 0.1, 0.5, 1 or 10 µm. Factory setting is 0.5 µm.
Q: Does it have built-in communication?
A: No. You can add optional GT2 series communication units.
Q: What power does it need?
A: It gets power from the main unit GT2-100N or GT2-100P.
Q: How do I contact Oiltech Controls?
Email: info@oiltechcontrols.com
WhatsApp: +86 158 8020 0923
Copyright © 2026 Oiltech Controls Limited. All rights reserved.
Original Source: https://www.oiltechcontrols.com/
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