Sensor-Technik Wiedemann GmbH (STW) products

The ESX.3ios is a CAN-I/O module for the extension of the inputs/outputs of a master control unit via CAN. The communication with the master control unit takes place via CANopen, CANopen Safety, the STW protocol ECeS and J1939. The ESX.3ios fulfills the safety requirements laid down in SIL 2 and PL d. For safe communication, the CANopen safety protocol and ECeS are supported. In addition to the Wake-up via terminal 15 / D+, Wake-up can also be carried out via CAN. Due to the robust aluminum die cast housing, a total current of up to 12 A can be implemented. The ESX.3ios has over 16 inputs and 15 outputs.

Cost-optimized CANopen-slave-I/O module for the extension of the inputs/outputs of a master control unit via CAN. The communication of the master control unit takes place via CANopen or a layer 2 protocol. The ESX.iox fulfils the safety requirements (PL b).

The Connectivity & Data Management module TCG-4lite is the latest, highest-performance member of the TCG product family. With its many new communications interfaces and powerful processor, innovative business models are possible in the field of digitalization.

The Connectivity & Data Management module TCG-4 is the latest, highest-performance member of the TCG product family. With its many new communications interfaces and powerful processor, innovative business models are possible in the field of digitalization.

The F02 Safety is available for pressure ranges to 1,200 bar. The sensor signal is made available at two outputs in parallel, whereby the second output represents an inverted signal. Users can choose between a ratiometric and an 4-20-mA output in three-wire technology. Due to the two-channel architecture, it is possible for a downstream control unit to not only check the functionality of the F02 Safety, but also to monitor the signal path. This allows the use in safety-relevant applications, which require a Performance Level PL d, AgPL d or SIL 2. The maximum permitted media temperature range extends from -40…+125 °C.

The mechanical and electronic characteristics of the M01 series have been especially designed for applications in adverse ambient conditions; in the same way value is placed on high resistance to aggressive media. Furthermore, the modular principle of the M01 series permits a large number of combinations of pressure connection, pressure range, electrical output signal and electrical connection, meaning that the right pressure sensor can be found for almost any application. Over and above this, we also offer the possibility of producing and supplying OEM versions.

The F01 is available for pressure ranges from 10 bar to 1200 bar and has two switching outputs which switch inverted to each other. Optionally, the F01 is also available in a version with one switching and one analog output. Here, the current output is read back by the F01 to ensure that the output signal is emitted correctly. To be able to use the F01 in as many applications as possible, users can select different pressure connections. The electrical contact takes place via a 5-pole M12 connector. Through the calibration of the transmitter via the temperature, a total accuracy of 1 % FS can be achieved within a range of 0...80 °C. The maximum media temperature totals +125 °C. The stainless steel parts coming into contact with media guarantee maximum media compatibility in combination with the welded thin-film measurement cell.

The P01 pressure switch has been especially designed for use in mobile machinery. The EMC properties as well as the shock and vibration resistance are specified particularly for these applications. This makes the PO1 perfect for use in harsh environmental conditions, such as those found in mobile hydraulics. The P01 is available in pressure ranges up to 2000 bar. Depending on the measuring cell type, the maximum permissible media temperature is 150 ºC with a maximum ambient temperature of 125 ºC. The wetted parts are made of stainless steel, and in combination with the welded thin film measuring cells, ensure a high media compatibility. To dampen pressure peaks, integrated damping in the media channel is available as an option.

The main challenge for temperature sensors used in mobile machines is the measurement directly in the medium and the rapid recording of temperature changes. On the T01, the parts coming into contact with media have been produced from stainless steel and guarantee, in combination with the welded temperature element, maximum media compatibility and fast response times. With the best EMC characteristics and high levels of shock and vibration resistance, the T01 can be used in demanding fields of application such as mobile hydraulics.

Strain sensors measure deflections, e.g. of steel arms, in various directions. In this way, forces, weights or vibrations can be indirectly recorded. The previously available strain sensor DMS has been revised completely and is now available in an optimized version. The newly developed hardware allows a lower height for the housing. The assembly points are identical to those of the predecessor product, thus enabling the seamless transition in already existing applications.  As before, both an analog and a digital output are available.