Answer: The main difference between contact relays and communication relays is the type of signals that they are designed to handle, with contact relays being used to control the flow of electricity in a circuit and communication relays being used to transmit data or signals from one location to another.
Explanation: The main difference between contact relays and communication relays is the type of signals that they are designed to handle. Contact relays are used to control the flow of electricity in a circuit by opening and closing electrical contacts, while communication relays are used to transmit data or signals from one location to another.Contact relays are typically used in applications where it is necessary to switch electrical circuits on and off, such as in control panels and automated systems. They are usually designed to handle relatively low-frequency electrical signals and are typically not suitable for transmitting data or high-frequency signals.On the other hand, communication relays are used to transmit data or signals from one location to another, and are typically designed to handle a wide range of frequencies and data types. They can be used to transmit voice, data, and video signals over a variety of mediums, including wire, fiber optic cables, and wireless transmission.