Needs Power Supply!!!!!
The Crestron ST-COM RS-232/422 Port Module is a component designed for use in smart home electronics and surveillance systems. This rack-mount module allows for easy installation and management of RS-232/422 ports in a home theater or security setup. With the trusted brand of Crestron, users can expect high-quality performance and seamless integration with other smart home devices for a seamless and efficient home automation experience.