What is a Control Cable and How to Select the Right One? A control cable is a multi-core connection cable that can measure and regulate transmissions of automated processes. In short, they can control machine components or their energy supply by transmitting simple control signals i.e. I/0 commands. They are mainly used in automation and instrumentation applications; however, their application is extensive in various other industries as well. They are typically shielded with foil or braid shield or the combination of both. Their qualities and construction play a great role in deciding whether a control cable is suitable for a particular application or you need to find another type of control cable. In this guide, you will learn how to select the right control cable for your application. To understand fully, it is better to be aware of the following terms:
Number of cores - the selection of the number of cores depends on the type of system where it is going to be installed. Voltage Class - it is not the actual system voltage but a term used for a set of distribution voltages and equipment common to them. Need of cable shield - the shield of a control cable protects it from reflecting signal interference, picking up noise, and conducting it to the ground. While a foil shield is low weight and low cost, a braided shield has higher strength and EMI/RFI resistance.
More about Voltage Class One of the crucial criteria in selecting a control cable is the voltage class, which is already defined by the designation 300/500V. This voltage class is found in the technical documentation of the machine components to be controlled. Besides, the cable is also inscribed with the voltage class to determine the correct setup. Apart from voltage class, a control cable is also inscribed with other details, such as cross-core combination and cable shield data if any. Based on the standard that a cable fulfills, further details are also included.
Then, you need to select the cable quality, i.e. the outer jacket material.
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