The EM300 series acquisition unit is small in size, flexible in installation, and convenient in wiring. It can be connected to the EasyECM integrated monitoring system and energy management system (or third-party system) of ESDTEK through the RS485 communication interface to form a complete automated monitoring system. There are five models: EM310, EM320, EM321, EM330, and EM340. The application range is I/O modules for loop monitoring, centralized acquisition and control of medium and low voltage systems below 35kV. EM310: Digital module (remote signal) 32 channels EM320: Analog module (remote measurement) 32 channels EM321: Analog quantity module (remote measurement) 8 channels EM330: Relay module (remote control) 16 channels EM340: Pulse volume acquisition (remote pulse) 32 channels The EM300 series acquisition unit adopts a variety of anti-interference measures in the design, and can operate stably in the harsh power system environment. The standard 35mm rail installation method is adopted, and it can be directly installed on the rail. It can be widely used in electric power, construction, industry, transportation, data center and other industries.