Trinity Touch Relay Card typically refers to a device that incorporates relays for switching electrical circuits based on control signals. These are designed to interface with control systems or microcontrollers. Built-in protections such as overcurrent protection, transient suppression, and isolation between control and load circuits. They find application in various industries and systems where multiple electrical circuits need to be controlled and switched based on external signals or conditions. Trinity Touch Relay Card is an essential component in control and automation systems, providing reliable switching and control of electrical circuits based on external signals or commands.