The Omron CJ1W-PRM21 is a Profibus master module from the CJ series, designed for seamless communication and integration within Omron CJ-series PLC systems. It supports multiple Profibus DP master functions, enabling efficient and reliable data exchange between the PLC and connected field devices. The CJ1W-PRM21 can be mounted on either a CPU rack or a CJ1 expansion rack, providing installation flexibility for diverse system configurations. Up to 16 modules can be installed within a single PLC setup, allowing scalable communication networks. The unit operates with a maximum current consumption of 400 mA at 5 Volts DC, ensuring stable and energy-efficient performance. The CJ1W-PRM21 may possibly be implemented in automation environments across North America, Europe, Asia, and worldwide, delivering dependable Profibus connectivity and advanced control network management.