How to Test a Communication Relay with a Multimeter: A Step-by-Step Guide

Relays are essential components in various electronic systems, enabling the switching of high-power circuits with low-power signals. In communication systems, relays are often used to control data transmission paths, making their proper function critical. Testing a communication relay can be done effectively using a digital multimeter, an inexpensive yet powerful tool that can measure voltage, current, resistance, and continuity. This article will walk you through the process of testing a communication relay with a multimeter, ensuring its correct operation and preventing potential failures in your system.