A daisy chain is a method of linking multiple electronic devices in sequence so each device connects to the next, creating a linear path for control signals to pass through the entire chain.
In commercial and industrial AV and control systems, a daisy chain provides a streamlined way to interconnect devices that depend on sequential data or control signal flow. Rather than running individual control lines to every device, the output from one device connects to the input of the next, forming a continuous chain. A control source connects only to the first device, and its signals propagate through each subsequent link.
This configuration is useful when multiple devices must receive similar control instructions or when equipment is designed to pass signals downstream. Daisy chaining is commonly used in lighting control units, automated fixtures, digital signage systems, stage equipment, and industrial automation components that utilize serial communication methods. Because each device sits in a defined sequence, the data path remains predictable and organized across the chain.
Devices built for daisy chain operation often include circuitry that accepts incoming control signals and retransmits them to the next unit. Examples include automated lighting instruments, color scrollers, dimmer racks, digital displays, and various industrial controllers. Certain communication protocols, particularly RS485, support daisy chain topologies due to their multi-drop signaling capabilities.
Daisy chain configurations appear in systems that may follow guidelines from organizations such as UL, IEC, and IEEE, which establish safety and communication framework requirements for electronic equipment.
Daisy chain topologies originated in early computer and communication systems as a way to link peripherals with minimal wiring. As digital control architectures advanced, the approach became widely used in professional AV, stage lighting, and industrial automation due to its efficiency and compatibility with serial communication technologies.