Keyence GT2-72P PNP Amplifier Expansion Unit

Keyence GT2-72P Digital Contact Sensor Amplifier Expansion Unit

Product Introduction

The Keyence GT2-72P is a high-accuracy digital contact sensor amplifier unit built for the GT2 series. Keyence designed this model as an expansion unit, so it works alongside a main amplifier. Specifically, it adds extra measurement channels without requiring a separate main unit. The expansion unit delivers a display resolution of 0.1 µm, which supports precise inspection tasks. Furthermore, its DIN-rail mount design simplifies panel layout and wiring. The GT2-72P also provides PNP open collector outputs for dependable signal transfer. In addition, it accepts a wide supply voltage range of 10 to 30 VDC. Therefore, it integrates smoothly into existing automation systems. Moreover, the unit shares the same response time settings as the main amplifier. As a result, users enjoy consistent performance across all connected channels.

Technical Specifications

The GT2-72P amplifier offers a broad display range. It covers -199.999.9 to 199.999.9 for flexible measurement. Furthermore, the display resolution reaches 0.1 µm for fine detection. The response time is selectable across several settings. For standard GT2 heads, options include hsp(3)/5/10/100/500/1,000 ms. Meanwhile, when using GT2-Pxxx heads, the choices become hsp(12)/20/40/400/2,000/4,000 ms. This flexibility helps users balance speed and accuracy.

Control input supports timing, preset, reset, and bank no-voltage input. Besides, the output type is HH/HI/GO/LO/LL PNP open collector. The output rating is 40 V / 50 mA or less with residual voltage of 1 V or less. Additionally, power consumption stays at 2,200 mW or less. At 30 V, the current draw is 73.3 mA or less. The unit has no built-in communication ports or protocols. However, communication expansion is possible via optional GT2 series communication units, sold separately.

Mechanical and Environmental Parameters

The Keyence GT2-72P operates in temperatures from -10 to +50 °C without freezing. Relative humidity should stay between 35 and 85 % RH with no condensation. The unit weighs approximately 140 g including the power cable. Unfortunately, dimensions and storage temperature are not available in the standard specification. Likewise, the protection rating is not published for this model. Nevertheless, the DIN-rail mounting system ensures a secure fit inside control cabinets. Meanwhile, the compact housing saves valuable panel space when multiple units are installed side by side.

Installation Guide

First, mount the GT2-72P on a standard DIN rail next to a GT2 main amplifier. Next, connect the expansion unit to the main unit using the supplied connection cable. Then, attach the sensor head to the amplifier unit. After that, wire the control inputs for timing, preset, reset, or bank selection. Moreover, connect the PNP open collector outputs to your PLC or controller. Finally, set the response time and display parameters through the front panel. Always follow Keyence guidelines for grounding and cable routing. This approach reduces electrical noise and ensures stable readings.

Packaging List

• 1 × Keyence GT2-72P amplifier expansion unit

• 1 × Power cable

• 1 × Mounting bracket

• 1 × Instruction sheet

• Shipping via Fedex, UPS, DHL

FAQ

Q1: What is the difference between the GT2-72P and the GT2-71P?
A: The GT2-72P is an expansion unit, while the GT2-71P is a main unit. Specifically, the expansion unit requires a main amplifier to operate. It adds channels but does not work as a standalone controller.

Q2: Does the GT2-72P have built-in communication ports?
A: No, the standard unit lacks built-in ports and protocols. However, you can add optional GT2 series communication units for network connectivity. These units are sold separately.

Q3: What is the display resolution of this amplifier?
A: The GT2-72P provides a display resolution of 0.1 µm. This high resolution suits precise measurement tasks. The display range spans -199.999.9 to 199.999.9.

Q4: How do I mount the GT2-72P in a control panel?
A: The unit uses DIN-rail mounting. First, snap it onto a standard DIN rail beside a main amplifier. Next, secure the power and sensor connections. Finally, verify the supply voltage stays within 10 to 30 VDC.

Q5: What is the response time range for the GT2-72P?
A: Response time depends on the sensor head. For standard heads, choices range from hsp(3) to 1,000 ms. For GT2-Pxxx heads, options range from hsp(12) to 4,000 ms.