Harting puts surge protection in a modular connector

A protective circuit housed within a modular connector protects common signals in the instrumentation and control (I&C) area. This means, says Harting, that both digital and analogue circuits are securely protected.

The company has incorporated this protective circuit into its Han SP module. Since these signals can be of different types, in addition to a modular combination for I&C signals with common reference potential (generally digital signals), Harting also offers a combination for differential signal transmission or for transmission without a common reference signal.

These signals are generally differential types such as bus interfaces up to 5MHz or analogue signals such as 0/4 to 20mA or 0/2 to 10V. Both types – two-channel types for differential signals and four-channel types for signals with common reference potential – can transmit nominal 24V DC and up to 0.5A. The protection level is approximately 50V, advises Harting, depending on the type.

Transients, which can disturb signal circuits and destroy electronic devices, are discharged to the ground via an appropriate spring element and the grounded Han-Modular hinged frame. This ensures interference-free transmission of the signal.

When used correctly, the surge protection modules reduce the number of operating faults, increase the service life of the production line and ultimately increase plant uptime. Additional costs are avoided and the profitability of the production plant is maintained.

The Harting Technology Group is one of the world’s leading providers of industrial connection technology for Data, Signal and Power. It has 13 production plants and branches in 44 countries. The company also produces retail checkout systems, electromagnetic actuators for automotive and industrial series use, charging equipment for electric vehicles, as well as hardware and software for customers and applications in automation technology, mechanical and plant engineering, robotics and transportation engineering.

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