SFAR-1M-4DIAbout the product SFAR 1M 4DI has 4x DI (Digital Inputs). Digital Inputs can work as fast pulse counter up to 1 kHz and support PNP or NPN input types. All inputs are separated from power supply and RS485 block with use of optical isolators. Built in RS485 interface allows to easy connection over Modbus RTU ASCII protocol with a PLC makes the modules an external I O. The use of 32 bit ARM core processor provides fast processing and communication with