Keyence GT-76A Digital Sensor Amplifier Unit

Keyence GT-76A Digital Sensor Amplifier Unit

Product Introduction

The GT-76A belongs to the Keyence GT series and works as a general purpose digital contact sensor amplifier unit. This expansion unit mounts directly onto a panel and delivers reliable measurement for automated production lines. With a display range of -99.999 to 999.999 and 1 µm resolution, it supports accurate dimensional inspection. The unit samples at 2,000 times per second, so it captures fast changes on moving workpieces. Furthermore, the NPN open collector output provides HIGH, GO, and LOW judgment signals. Engineers often choose the GT-76A for tasks that require repeatable contact sensing in tight spaces.

Technical Specifications

The Keyence GT-76A provides a wide display range from -99.999 to 999.999. Its display resolution reaches 1 µm, which suits fine measurement tasks. Sampling speed runs at 2,000 times/second, enabling real-time data capture. Users can select response times of hsp (1.5 ms), 5 ms, 10 ms, 100 ms, 500 ms, 1 s, or 5 s. This flexibility helps balance speed and stability for different materials.

For communication, the unit has no built-in ports or protocols. However, communication expansion is possible through optional GT series communication units sold separately. This design keeps the base unit compact while allowing future network upgrades.

Electrical Parameters

The GT-76A operates on 12 to 24 VDC with ripple (p-p) of 10 % or less. In normal mode, power consumption is 1,140 mW (95 mA) or less at 12 V, and 1,200 mW (50 mA) or less at 24 V. In power-saving (Eco) mode, consumption drops to 600 mW (50 mA) or less at 12 V, and 840 mW (35 mA) or less at 24 V. The output type is HIGH/GO/LOW NPN open collector with a maximum of 50 mA (40 V or less). Residual voltage stays at 1 V or less, and N.O./N.C. selection is available.

Mechanical and Environmental Data

Operating temperature ranges from -10 to +55 °C with no freezing. Relative humidity stays between 35 and 85 % RH with no condensation. The unit weighs approximately 110 g including the power cable. Storage temperature, protection rating, and exact dimensions are not available from the official specification. Therefore, installers should allow adequate clearance around the panel cutout for cable routing and heat dissipation.

Installation Guide

First, prepare a standard panel cutout that matches the GT series expansion unit footprint. Next, insert the GT-76A into the cutout and secure it with the supplied mounting brackets. After that, connect the power cable to a 12 to 24 VDC supply that meets the ripple requirement. Moreover, wire the NPN output to the PLC or controller input according to the N.O./N.C. setting. Finally, set the response time and display parameters through the front keys. Always power down before wiring to avoid damage.

Packaging List

• One Keyence GT-76A digital contact sensor amplifier unit

• One power cable

• Mounting brackets and hardware

• Installation guide

FAQ

Q1: What is the main function of the GT-76A?
A: The GT-76A amplifies signals from GT series contact sensor heads. It displays measurements and provides HIGH/GO/LOW judgment outputs.

Q2: Does the GT-76A include built-in communication ports?
A: No. The unit has no built-in ports or protocols. You can add communication through optional GT series communication units.

Q3: What response times can I select?
A: You can choose hsp (1.5 ms), 5 ms, 10 ms, 100 ms, 500 ms, 1 s, or 5 s. This range covers both fast and stable measurement needs.

Q4: What is the power requirement for this amplifier unit?
A: It needs 12 to 24 VDC with ripple (p-p) of 10 % or less. Eco mode reduces power consumption for energy-saving operation.

Q5: How is the GT-76A shipped?
A: We ship this unit through Fedex, UPS, or DHL. Packaging protects the amplifier, cable, and mounting hardware during transit.