The TD521D485H with Communication Modules DIP RoHS is a communications module developed by MORNSUN. It has a RoHS certifiate and is sold as a Dip-type IC, making it suitable for surface-mount technology (SMT) applications. It has TD521 signal transceiver, which operates as a two channel half-duplex line driver. This transceiver supports speeds up to 120Kbps, and has communication features such as slew rate control, line guard circuitry, and data polarity detection. It also includes one RS-485 interface, which is used for full duplex point-to-point long-distance communication. This module is also compliant with the JENC3.0-2010 cable communication standard. Its wide operating temperature range makes it suitable for a variety of applications, including industrial automation, security systems, and building control systems.