# What is a Pilot Relay? **URL:** \ **Category:** Electrical\ **Tags:** relay\ **Created:** [April 14, 2025, 1:50pm UTC](https://forumautomation.com/t/what-is-a-pilot-relay/13159 "2025-04-14T13:50:14Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![Rabert](https://forumautomation.com/user_avatar/forumautomation.com/rabert/32/6784_2.png) [@Rabert](https://forumautomation.com/u/Rabert)\ **Post date:** [April 14, 2025, 1:50pm UTC](https://forumautomation.com/t/what-is-a-pilot-relay/13159/1 "2025-04-14T13:50:14Z")
> # What is a Pilot Relay? A small, low-power relay called a pilot relay is used to manage a larger, high-power relay (or) equipment. It ensures safer and more dependable system operation by serving as a buffer between large loads and delicate control components (such as PLCs). Adding a pilot relay could be the missing component when debugging a noisy control signal (or) attempting to drive a huge relay from a fragile PLC output, yet many experienced technicians continue to ignore it. > # Why Pilot Relay is Important? Whether you’re wiring a new control panel or upgrading an outdated system with electrical noise problems, adding a pilot relay can increase system reliability, help shield your gadgets from harm, or lessen electrical noise. Relays that don’t operate reliably shouldn’t be immediately attributed to the PLC. ![image](https://cdn.forumautomation.com/original/2X/3/358d8492b8891b961ba4feddcdbaaf460b5f3aad.jpeg) Adding a pilot relay could potentially resolve the problem. > # What makes a Pilot Relay useful? - Electrically isolates delicate PLCs or output chips from surges. - Matches voltage/current levels across devices. - Increases the lifespan of control circuit boards and outputs. - Amplifies weak control signals to activate massive loads. > # Applications of Pilot Relay Uses Pilot relays increase the stability and ease of maintenance of a variety of systems, including motor starters, brakes, valve relays, security systems, and elevator/escalator controllers.