Signal towers, also known as stack lights or indicator lights, are essential visual signalling devices used in industrial and commercial settings. These towers consist of a vertical stack of coloured lights, often LED, that are easily visible from a distance.

The colours of the lights in a signal tower usually correspond to specific meanings. For example, green may indicate that a machine or process is running normally, yellow may indicate a warning or caution, and red may indicate an emergency or stoppage.

Some signal towers also include audible alarms or horns to provide an additional warning. They are typically installed on top of machines, systems, or walls to convey critical information about the status of equipment or processes.

Where are LED signal towers used?

• Warehouses and distribution centres: Signal towers are used to indicate when a loading dock is occupied, or when a shipment is ready for pickup.
• Transportation and logistics: Signal towers can be used to indicate the status of traffic lights, railway signals, or airport runways.
• Food and beverage processing: Signal towers can be used to indicate when a production line is in operation, or when there is a problem with a piece of equipment.
• Pharmaceuticals and healthcare: Signal towers can be used to indicate the status of medical equipment, such as a sterilization unit or an X-ray machine.

Signalling in Automation Processes

In automation processes, signal towers play a critical role in preventing errors and avoiding costly downtime:

• Error Prevention: By providing real-time visual alerts, signal towers help operators quickly identify and address issues before they escalate. This reduces errors and ensures smooth operation.
• Downtime Reduction: Signal towers can indicate when a machine requires maintenance or when there is a fault that needs immediate attention. This helps in minimizing downtime by enabling prompt corrective actions.
• **Enhanced Safety: **By clearly indicating the status of machinery, signal towers support a safer working environment. Operators can respond quickly to changes in machine status or emergencies, reducing the risk of accidents.

Signal Tower Features

• Durability: Signal towers are durable and robust, and can withstand harsh conditions such as high winds, heavy rain, and mechanical impacts. They often come with IP (ingress protection) ratings ranging from IP54 to IP69K. This ensures that the signal tower remains operational in the most challenging environments.
• Long-Life Bulbs: Signal towers often use LED bulbs, which are known for their energy efficiency and long lifespan. LED bulbs provide a bright illumination, which reduces the need for frequent replacement or maintenance.
• Networking Options:** **Advanced signal towers have the ability to be integrated into industrial networks for real-time monitoring and control. With Ethernet and USB connectivity this enables seamless communication with other devices and systems.
• Custom Programming: Some LED light towers can be programmed with custom light effects, allowing for more complex and customized signalling. This feature enables users to set specific patterns, colours, and sequences to suit their application or environment
• Power Supply Types: Signal towers are designed to operate with different power supply types, including 24V, 115V, and 230V AC or DC. This allows them to be used in various industrial settings without the need for extensive modifications.
• Mounting Options: Signal towers offer a variety of mounting options to accommodate different installation requirements. These include base mounting, tube mounting, and pole mounting. Quick disconnect features, such as M12 connectors, simplify installation and maintenance, reducing downtime and ensuring secure connections.

RS has a great selection of high-quality signal towers from industry-leading brands such as Patlite Moflash Werma AUER Signal and our brand RS PRO.