Keyence GT2-550 NPN Multi-Head Expansion Unit

Keyence GT2-550 Digital Contact Sensor Expansion Amplifier

Product Introduction

The GT2-550 is a high-accuracy digital contact sensor amplifier unit from the Keyence GT2 series. Unlike a main controller, this model works as a multi-head expansion unit. Specifically, it connects to the GT2-500 main unit and adds extra measurement channels. Because it uses a DIN-rail mount, the Keyence GT2-550 fits neatly beside the main amplifier inside the cabinet.

Technical Specifications

First, the display range covers -199.999.9 to 199.999.9. This span handles both positive and negative measurement values. The display resolution reaches 0.1 µm, which supports fine positioning and inspection work. Additionally, the response time offers selectable settings. Users may choose hsp(3), 5, 10, 100, 500, or 1,000 ms. When paired with GT2-Pxxx sensor heads, options extend to hsp(12), 20, 40, 400, 2,000, or 4,000 ms.

Moreover, the control input supports timing, preset, reset, and bank no-voltage input. This design simplifies synchronization with PLC sequences. The GT2-550 also provides HH, HI, GO, LO, and LL NPN open collector outputs. These outputs handle 40 V and 50 mA or less, with residual voltage at 1 V or less.

Communication relies on optional GT2 series communication units, sold separately. Besides, the expansion unit has no built-in ports or protocols. Therefore, plan network architecture around separate communication modules.

Electrical and Mechanical Parameters

The supply voltage ranges from 10 to 30 VDC with ripple (p-p) 10% included, Class 2. However, power actually comes from the main unit, so no separate supply wiring is needed. The unit weighs approximately 95 g, which adds little load to the DIN rail. Meanwhile, dimensions are not available in the current documentation.

Environmental Conditions

Operating temperature ranges from -10 to +50 °C without freezing. Relative humidity stays between 35 and 85 % RH without condensation. The protection rating is not available. Additionally, storage temperature is not specified. Therefore, install the GT2-550 inside a clean, stable control cabinet.

Installation Guide

Next, snap the GT2-550 onto a standard DIN rail beside the GT2-500 main unit. First, connect the expansion cable between both units. Then, attach each GT2 series sensor head to its channel. After that, wire the NPN outputs to the PLC or controller inputs. Finally, set the response time and bank settings for your application. Besides, keep cables away from high-voltage lines to reduce noise.

Packaging List

• 1 × Keyence GT2-550 multi-head expansion unit

• 1 × Expansion connection cable

• 1 × DIN-rail mounting clip

• 1 × Instruction sheet

Shipping

We ship via Fedex, UPS, and DHL. Delivery times vary by destination. Tracking numbers are provided after dispatch.

FAQ

Q1: What is the main difference between the GT2-550 and GT2-500?
A: The GT2-550 is an expansion unit, while the GT2-500 is the main unit. You connect the expansion unit to the main unit to add channels.

Q2: Does the GT2-550 need its own power supply?
A: No. Power comes from the main unit. The supply range is 10 to 30 VDC, Class 2.

Q3: Which output type does this expansion unit use?
A: It uses HH/HI/GO/LO/LL NPN open collector outputs. These handle 40 V and 50 mA or less.

Q4: What is the display resolution of the GT2-550?
A: The GT2-550 offers 0.1 µm display resolution. The display range spans -199.999.9 to 199.999.9.

Q5: Does it have built-in communication ports?
A: No. It has no built-in ports or protocols. You need optional GT2 series communication units for network expansion.