Control Cables: Everything You Need to Know

Concretely, what are control cables, what are they used for, and how to choose them? This is what we will explore in this article.

What is a control cable?

Un control cable, also called control cable, is an electrical cable designed to transmit control or regulation signals within a facility. Unlike power cables, which carry high-voltage electricity, control cables carry low currents. Their purpose is to enable communication between the various components of an industrial or automated system.

These cables are often used in technical environments such as factories, electrical substations, production lines or even in transport and building automation systems.

What are control cables used for?

Control cables have several uses, all related to equipment management and control. Here are some of the main functions that RS outlines for us:

• Signal transmission: They send information between sensors, programmable logic controllers, relays or control devices.
• Equipment control: They allow you to activate or deactivate motors, valves, or other electrical devices remotely.
• Safety: They are also used to connect safety elements such as emergency stop switches or fault detectors.
• Monitoring: They facilitate feedback to verify the proper functioning of the facilities.

The different categories of control cables

There are two main categories of control cables: shielded cable and unshielded cable. shielded control cable has a protective shield (usually copper braid or aluminum foil) that protects it from electromagnetic interference. It is recommended for electrically noisy industrial environments or near power cables. Unshielded control cable, on the other hand, does not have this protection and is used in installations less exposed to disturbances, such as control circuits inside an electrical cabinet. The choice between the two depends on the requirements of the environment and the level of accuracy required for signal transmission.

Criteria for choosing a control cable

Choosing the right control cable isn't just a matter of length or color. There are several key technical criteria to consider:

• Installation environment: Indoor or outdoor? Humid, dusty, or high temperature environment?
• Flexibility: Some systems require cables that bend and move often.
• Electromagnetic protection: If the cable passes near sources of interference, it is better to opt for a shielded model.
• Safety standards: Current electrical standards must be complied with, particularly with regard to fire resistance, insulation and mechanical strength.

Control cables are a fundamental link in electrical and automation systems. They ensure the smooth and reliable transmission of signals between various components. Although often invisible once installed, they guarantee the proper operation and safety of industrial and commercial facilities. Choosing the right cable, suited to the application and context, ensures the durability, performance, and safety of your entire system.