Keyence GT2-72CN Sensor Amplifier | DIN-Rail

Keyence GT2-72CN Amplifier Unit with Analog Output

This article explains the Keyence GT2-72CN digital contact sensor amplifier unit and its measurement roles. Furthermore, it covers technical specifications, installation guidance, packaging details, and common questions.

Product Introduction

The Keyence GT2-72CN belongs to the GT2 series of high-accuracy digital contact sensor amplifiers. Specifically, this expansion unit mounts on a DIN rail and extends a main amplifier chain. Additionally, it provides both switching judgments and a 4-20 mA analog signal. Therefore, it suits multi-point inspection and thickness measurement tasks.

Technical Specifications

The GT2-72CN displays values from -199.999.9 to 199.999.9 with 0.1 µm display resolution. Its fast response time starts at 3 ms in hsp mode. Moreover, selectable response settings include 5, 10, 100, 500, and 1,000 ms.

When paired with GT2-Pxxx heads, response options expand to 12, 20, 40, 400, 2,000, and 4,000 ms. Consequently, users can balance speed and stability for each task. The control input supports timing, preset, reset, and bank no-voltage signals.

Electrical Parameters

The GT2-72CN runs on 10 to 30 VDC with 10 % ripple included. Power consumption stays at 2,200 mW or less, drawing 73.3 mA or less at 30 V. The NPN open collector output covers HH, HI, GO, LO, and LL judgments.

Output ratings reach 40 V and 50 mA or less, with residual voltage at 1 V or less. Besides, the analog output provides 4 to 20 mA with a maximum load resistance of 350 Ω. Additionally, communication expansion is possible through optional GT2 series communication units, which are sold separately.

Environmental and Physical Parameters

Operating temperature spans -10 to +50 °C without freezing. Meanwhile, relative humidity tolerance covers 35 to 85 % RH without condensation. The unit weighs approximately 140 g including its power cable.

Installation Guide

First, snap the GT2-72CN onto a standard DIN rail inside the control panel. Next, connect the power cable to a 10 to 30 VDC Class 2 supply. Then, link the expansion unit to a main amplifier through the side connector. Finally, wire the analog output to your PLC or recorder input.

As an expansion unit, the GT2-72CN depends on a main unit such as the GT2-71CN. Therefore, plan rail space for the full amplifier chain. Besides, keep analog cabling away from high-voltage lines to reduce noise.

Packaging List

• 1x Keyence GT2-72CN Amplifier Unit

• 1x Power Cable

• 1x Mounting Hardware Set

• Shipping via Fedex, UPS, DHL

FAQ

Q1: What is the display resolution of the GT2-72CN?
A: The GT2-72CN provides 0.1 µm display resolution. This supports fine dimensional inspection tasks.

Q2: Does the GT2-72CN include analog output?
A: Yes. It offers a 4 to 20 mA analog output. The maximum load resistance is 350 Ω.

Q3: Can the GT2-72CN work alone?
A: No. The GT2-72CN is an expansion unit. It requires a main amplifier to form a working system.

Q4: What is the fastest response time available?
A: The fastest setting is 3 ms in hsp mode. Other options range from 5 ms up to 4,000 ms.

Q5: What supply voltage does the GT2-72CN require?
A: It requires 10 to 30 VDC with 10 % ripple included. Use a Class 2 power source for safe operation.