The Journal of Industry and Technology

Industrial Analytical Instrumentation

Euro Technology

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Precision sensors, systems and instrumentation

Rotation speed monitor in the 6 mm
enclosure design now with restart inhibit

The SC-System's family of signal conditioners by Pepperl+Fuchs can now be used even more comprehensively: the single rotation speed monitor with just a 6 mm installation width processes digital input signals of all binary sensors currently on the market and is now fitted with a restart inhibit. This feature enables the module to have to be activated via a reset input after limit values have been exceeded for a short period of time so that possible faults are found and rectified before restarting.

The design of the rotation speed monitor meets the philosophy that all signals of a signal type currently on the market may be processed with just one module. Signals from NAMUR and SN sensors including line fault detection and short-circuit detection, as well as the measurement data from the 2-wire DC sensors may be processed in accordance with EN 60947-5-2. Signals can be transferred safely in the control level from S0 sensors for measuring the water volume and from 3-wire sensors with PNP or NPN switching outputs. With its S0 interface the rotation speed monitor is also of interest for areas outside industrial automation, such as building automation. The module can safely detect any signal up to 30 V with an input frequency up to 50 kHz. The device is set using a DIP switch or PC software. A start-up override is available to restart the system when standstill monitoring.

The SC-System from Pepperl+Fuchs includes a wide portfolio of signal conditioners for nonhazardous areas. With its space-saving enclosure design that is 6 mm wide and 97 mm high the modules are among the most compact on the market. They can be used at ambient temperatures of up to 70°C. The signal isolators are characterized by 3-way isolation withstanding a working voltage up to 300 V and a test voltage up to 3 KV. Optionally, they are supplied by terminals or a power bus.

Image 1 (L): The single 6 mm rotation speed monitor is now equipped with a restart inhibit.
Image 2 (R): SC-System: compact signal conditioner with high conditioning safety 

Pepperl+Fuchs in profile
Pepperl+Fuchs is a leading developer and manufacturer of electronic sensors and components for the global automation market. For more than 60 years, our continuous innovation, high quality products, and steady growth have guaranteed us continued success.

One Company - Two Divisions
The Process Automation Division is a market leader in intrinsically safe explosion protection. We offer comprehensive, application-oriented system solutions, including customer-specific control cabinet solutions for the process industry. A large portfolio of components is available from our various product lines: isolated barriers, fieldbus infrastructure solutions, remote I/O systems, HART interface solutions, level measurement devices, purge and pressurization systems, industrial monitors and HMI solutions, power supplies, separator alarm systems for oil and petrol separators, signaling equipment, lighting as well as emergency shutdown equipment and accessories.

With the invention of the inductive proximity sensor in 1958, the company set an important milestone in the development of automation technology. Under the motto »Sensing your needs», customers benefit from tailor-made sensor solutions for factory automation. The main target markets of the factory automation are machine and plant construction, the automotive industry, storage and material handling, printing and paper industry, packaging technology, process equipment, door, gate and elevator construction, mobile equipment, renewable energies. The division offers a wide product range of industrial sensors whether it´s inductive, photoelectric or ultrasonic sensors, rotary encoders, identification systems, barcodes, code readers for data-matrix-codes and vision sensors.

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