CJ1W-SRM21

Model Number CJ1W-SRM21 is a product type of communication device made by Omron Automation and Safety for industrial and automation use. This device is a master unit for connectivity explicitly designed for Remote I/O communication in the PLC systems. It is a master unit for the CompoBus/S system. Hence, it uses the proprietary CompoBus/S protocol for streamlined control of up to 256 slave devices. It is adaptable to various contexts because of its capability for short- and long-distance communications at high speeds. In addition, the CJ1W-SRM21 has a maximum baud rate of 750 kbps in its high-speed mode and a maximum baud rate of 93.75 kbps in its long-distance mode, enabling transmissions across distances of up to 500 meters. When operating in long-distance mode, the master unit is compatible with free wiring using any branching technique up to 200 meters long. The CJ1W-SRM21 is equipped to handle many sensor terminals, including proximity and photoelectric sensors, analog input terminals, and digital output terminals. It has rotary and DIP switches for easy customization. Because of its lightweight construction (66 grams with the connection), the master unit takes up very little room. The high I/O capacity of 256 I/O points (128 inputs and 128 outputs) or 128 I/O points (64 inputs and 64 outputs) is switch-selectable, and the maximum number of slave devices it may connect to is 32. The CJ1W-SRM21 is scalable and expandable since it supports 8 addresses per node and can accommodate 40 mountable Master Units.