CJ1W-CLK21-V1

The CJ1W-CLK21-V1, a product of Omron Automation, serves as a Controller Link Unit designed to facilitate wired communication capabilities for an assortment of CJ series Programmable Logic Controllers (PLCs). This unit is strategically mounted on a DIN rail and features screw terminals for secure wire connections. It uses various link network switches, including unit number switches (utilized as rotary switches), node address switches, and terminating resistance slide switches. For efficient high-data communication, the unit provides three dedicated screw terminals. The CJ1W-CLK21-V1 enables the connection of up to eight (8) units per Central Processing Unit (CPU). However, the capacity differs across series: the CP1H series supports only two (2) connections, whereas the NSJ series can accommodate up to eight (8) connections when an expansion backplane is employed. The CJ1W-CLK21-V1 shielded twisted-pair cables. Manchester code is employed for encoding, utilizing baseband modulation techniques for transmission. Synchronization is achieved through flag synchronization. The unit works with several transmission rates, each with a specific maximum distance. For instance, at a transmission rate of 2 Mbits/s, the maximum distance achievable is 500 meters. However, a lower transmission rate of 500 kbits/s extends the maximum feasible distance to 1 kilometer. Physically, the CJ1W-CLK21-V1 is lightweight, weighing around 0.110 kg. It consumes approximately 0.35 amps of current when integrated into a 5-volt PLC. The unit features an LED indicator for visual feedback alongside a unit number switch for straightforward identification and configuration. Moreover, the unit incorporates two-pin DIP switches, allowing users to customize the transmission rate. Importantly, its tool-less installation simplifies integration into systems.