Keyence GT-71AP PNP Sensor Amplifier Unit

Keyence GT-71AP PNP Sensor Amplifier Unit

Product Introduction

The GT-71AP is a general purpose digital contact sensor amplifier unit from the Keyence GT series. It serves as a main unit and mounts on a standard DIN-rail, so cabinet installation stays quick and clean. With a display range of -99.999 to 999.999 and 1 µm resolution, it handles fine dimensional checks with ease. The unit samples at 2,000 times per second, which allows accurate tracking of fast production processes. Furthermore, the PNP open collector output delivers HIGH, GO, and LOW judgment signals. Many engineers select the GT-71AP when they need a reliable main amplifier with positive logic output.

Technical Specifications

The Keyence GT-71AP covers a display range from -99.999 to 999.999. Its display resolution is 1 µm, making it suitable for precise measurement work. Sampling speed reaches 2,000 times/second, so the unit responds quickly to changing targets. Users may choose response times of hsp (1.5 ms), 5 ms, 10 ms, 100 ms, 500 ms, 1 s, or 5 s. This selection lets operators match speed against signal stability.

Regarding communication, the unit offers no built-in ports or protocols. Nevertheless, communication expansion is available through optional GT series communication units sold separately. As a result, the base amplifier stays compact while remaining ready for future network needs.

Electrical Parameters

The GT-71AP runs 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 falls 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 PNP open collector with a maximum of 50 mA (40 V or less). Residual voltage remains 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. Meanwhile, 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 leave enough clearance around the DIN-rail for cable routing and airflow.

Installation Guide

First, snap the GT-71AP onto a standard DIN-rail inside the control cabinet. Next, connect the power cable to a 12 to 24 VDC supply that meets the ripple requirement. After that, wire the PNP output to the PLC or controller input according to the N.O./N.C. setting. Moreover, attach the sensor head cable to the amplifier input terminal. Finally, configure the response time and display parameters through the front keys. Always power down before wiring to prevent damage.

Packaging List

• One Keyence GT-71AP digital contact sensor amplifier main unit

• One power cable

• DIN-rail mounting hardware

• Installation guide

FAQ

Q1: What is the main function of the GT-71AP?
A: The GT-71AP amplifies signals from GT series contact sensor heads. It shows measurements and provides HIGH/GO/LOW judgment outputs.

Q2: What is the difference between the GT-71AP and expansion units?
A: The GT-71AP works as a main unit with PNP output. Expansion units add more channels but require a main unit to operate.

Q3: Does the GT-71AP have built-in communication ports?
A: No. It has no built-in ports or protocols. You can add communication through optional GT series communication units.

Q4: Which response times are selectable?
A: You can choose hsp (1.5 ms), 5 ms, 10 ms, 100 ms, 500 ms, 1 s, or 5 s. This range supports both fast and stable measurement.

Q5: How is the GT-71AP shipped?
A: We ship this unit through Fedex, UPS, or DHL. Packaging protects the amplifier, cable, and mounting hardware during transit.