Efficient sensor integration with the SICK SIG350 Gateway

January 25, 2024
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Efficient sensor integration with the SICK SIG350 Gateway-0

The guidelines of Industry 4.0 are increasingly being implemented in the industrial environment, introducing various types of digital solutions and technologies at increasingly rapid steps. These processes make it possible to connect and coordinate production steps and elements while obtaining the much-needed data. With the use of smart devices and sensors, it is possible to collect and analyze data about every step of production. The problem can arise when it is necessary to combine data from these sensors in one place. We would like to introduce the SICK SIG350 Gateway device. It can collect, process, and transfer data from various sensors, controllers, and other devices that are connected in the production process.


Table of contents:


SICK SIG350 Sensor Integration Gateway

The SICK SIG350 IO-Link master is a sensor integration gateway that integrates and controls sensor communication via eight IO-Link ports. The SIG350 enables seamless integration and excellent data transfer from the sensor to the PLC or data cloud, reducing the amount of cabling required.


This data can be used for sensor monitoring, configuration and diagnostics. This in turn reduces process downtime and improves production efficiency. The result is increased productivity and sustainability.

The SIG350 provides two parallel communication channels - communication with the control PLC (using industrial protocols) and with cloud applications (using IIoT interfaces). This is what is commonly referred to as "Dual Talk".

The ports can be loaded with up to 4 A of maximum current to integrate higher power actuators and sensors. PROFINET, EtherNet/IP and EtherCAT industrial protocols are available for network communication with the PLC.

Data exchange with cloud solutions is possible via the following IIoT interfaces:

  • REST API (Representational State Transfer - Application Programming Interface),
  • MQTT (Message Queuing Telemetry Transport),
  • OPC UA (OPC United Architecture).

The SIG350's integrated web server provides a wide range of information, diagnostic and configuration options. Thanks to IO-Link communication, the integrated web server allows intuitive configuration of the IO-Link Master device as well as all connected sensors and actuators, even during operation. The web server also provides live current data (e.g. current, voltage and temperature values) as well as diagnostics.

3 types of IO-Link Master devices are available for connection to the control PLC:

  • EtherCAT IO-Link Master,
  • EtherNet/IP IO-Link Master,
  • PROFINET IO-Link Master.

SIG350 technical data

Operating temperature
 -30 °C ... +70 °C
Number of ports 8 IO-Link ports (M12; 5-pin; A-coded; Class A/B)
Current-carrying capacity
Current carrying capacity of up to 16 A at max. 4 A per port for US and UA
Housing protection Rugged IP67 housing
Industrial protocols PROFINET, EtherNet/IP un EtherCAT
Cloud solution protocols REST API, MQTT and OPC UA IIoT 

SIG350 Gateway advantages

  • Easy installation - the device is easy to install, takes up little space and saves costs;
  • Reliable data transfer - between a large number of sensors or actuators and higher-level control equipment such as a PLC;
  • Simple and transparent data integration - single wiring concept with IO-Link;
  • Fast and innovative sensor connection and parameterization - integrated web server;
  • Free port configuration - input ports can be freely configured as class A or B IO-Link ports;
  • INDUSTRIE 4.0 READY - thanks to IIoT connectivity via REST API, MQTT and OPC UA.

SIG350 Gateway applications

The most common application for this product is the combination and integration of multiple IO-Link sensors and their digital signals into selected factory process automation.

Here is one illustrative example of how the SICK SIG350 Gateway is used in a factory environment. This product can connect and manage multiple SICK MPB10 condition monitoring vibration sensors with IO-Link communication that were installed on motors in several factory lines.

Sensors on one specific line were connected to the SIG350 Gateway device. In this way, data from the vibration sensors was transmitted to the control PLC. The data can then be collected and generated in the SCADA system. This enables the condition of the motors to be monitored and controlled on all lines in the factory. It should be emphasized that this convenient solution allows early detection of equipment damage and timely scheduling of repair work. In this example, the SIG350 Gateway simplified installation work and ensured reliable data transmission.

Application of SICK sensors in Industry 4.0

For some time now, our lives have been transformed by the Fourth Industrial Revolution or Industry 4.0. With the help of the latest technologies, the virtual and physical worlds have merged to create Cyber-physical systems (CPS). In this digitalization of production and services, machines are able to communicate with each other and this makes it possible to optimize the operation of different processes.

Industry 4.0 is clearly about sensors, which are the basis for the entire production process. SICK points out that without sensor technology there would be no Industry 4.0. Smart sensors make it possible to obtain data and information that go many times beyond what we are used to in classical switching methods. Unlike conventional sensors, Industry 4.0 sensors provide more than just measurement data. Their integrated decentralized computing power and flexible programmability are important features to make production more flexible, dynamic, and efficient. This enables companies to reduce the maintenance and service costs of production equipment and avoid production downtime.



Data acquisition and analysis with SICK sensors

It is well known that conclusions, predictions, and improvements require good-quality data. To get it, all elements of the system need to be able to "talk" to each other. For this, the IO-link standardized serial communication protocol has become widely used in the sensor and actuator world. In the future, it is expected that the majority of available sensors and actuators will be equipped with this protocol. Time will tell whether this will be the case, but it is certainly worth finding out more about it. Here are some examples of products equipped with these protocols!

  • SICKMiniature Photo Sensor WTT2SL – Photoelectric sensors with Time-of-flight technology allow perfect detection of dark, shiny and other objects that standard technology sensors cannot detect. Versions with IO-Link allow additional sensor functionality. The PowerProx photo sensor is designed to work in difficult conditions and confined spaces thanks to its small housing.
  • SICK OD2000 is ideal for manufacturing companies or machine builders who value the sensor's wide range of applications or versatility and ease of installation. The OD2000 distance sensor is suitable for a wide range of positioning tasks in manufacturing, performing high precision measurements, detecting even the smallest height differences in the micrometer range.
  • Contrast Sensor Series KTS and KTX - this series has a completely new design that will replace the classic KT5 series in the future. The available models are grouped as follows - Basic models (for standard applications) and Prime models (for higher complexity situations with higher coverage tolerance). The sensors are available in two different housing sizes: small KTS sensors and large KTX sensors.

Follow the links below to find out more about the technologies developed by SICK and their practical applications. Our recommendation is to consider using smart sensors today in areas vital to your production process and start collecting data! Work and think about the future today!

Citi raksti un video materiāli par SICK sensoru risinājumiem:

  1. SICK Vibration sensor for monitoring of motors and equipment
  2. Universal photoelectric sensor with MultiMode from SICK
  3. Universal distance and position sensor from SICK


Code: 1072532
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Juris Vuškāns
Juris Vuškāns
Industrial Sensor Specialist
+371 2411 0541

Product family overview SIG350

IO-Link Technology

Smart Sensors from SICK