Omron CS1W-CLK13 Controller Link Unit

The Omron CS1W-CLK13 is a Controller Link unit for the Omron CS1 series programmable logic controllers. This communication module provides high-speed, deterministic data exchange between multiple PLCs, computers, and other automation devices over an optical fiber network (H-PCF cable). The Controller Link network supports distributed control applications, enabling real-time data sharing and interlocking between separate PLC systems without complex programming. The CS1W-CLK13 is suitable for factory automation systems where reliable, noise-immune communication is required across long distances or in electrically noisy environments.

Technical Specifications

The CS1W-CLK13 operates on 5 V DC supplied by the CS1 series backplane. Current consumption is 0.52 A at 5 V DC. The unit supports optical fiber H-PCF (Hard Plastic Clad Fiber) cable type with an operating temperature range of -20°C to +55°C. The Controller Link protocol supports data link functionality for cyclic data exchange between nodes, as well as message communications for on-demand data transfers. Maximum transmission distance depends on the optical fiber type and network topology. The module includes a fiber optic cable fixing bracket for securing the cable connection. The unit is designed to be installed in a CS1 series CPU rack or expansion rack. Dimensions conform to CS1 series module standards. The front panel includes LED indicators for communication status and unit power.

Key Features

• Controller Link network communication unit for CS1 series PLCs

• Optical fiber H-PCF interface for noise immunity

• Cyclic data link for deterministic data exchange

• Message communications for on-demand data transfers

• Fiber optic cable fixing bracket included

• Operating temperature -20°C to +55°C

• 5 V DC backplane power (0.52 A consumption)

• Compatible with CS1 and CJ1 series PLC racks

Controller Link Network Architecture

The Controller Link network is an FA (Factory Automation) network that provides both data link (cyclic communications) and message communications (event-driven exchanges). The CS1W-CLK13 unit acts as a node on this network, allowing the CS1 PLC to share global data with other PLCs or computers. Cyclic data is exchanged automatically between all nodes at a user-configured refresh interval, ensuring that each node has a consistent view of critical status bits and data words. Message communications are used for sending commands, requesting data, or configuring remote nodes. The network can be configured in a bus or star topology using optical fiber cables, providing galvanic isolation between nodes and immunity to electrical noise.

Optical Fiber Interface

The CS1W-CLK13 uses H-PCF (Hard Plastic Clad Fiber) optical fiber, which offers a balance of cost and performance for industrial environments. H-PCF fiber is more robust than standard plastic fiber and easier to terminate than glass fiber, making it suitable for field installation. The optical interface eliminates electrical ground loops and provides excellent immunity to electromagnetic interference (EMI) from variable frequency drives, welders, and other high-power equipment commonly found in factories. The included fiber cable fixing bracket ensures the optical cable is securely attached to the unit, preventing accidental disconnection.

Integration with CS1 Series

The CS1W-CLK13 installs into any available slot of a CS1 CPU rack (or CJ1 series rack with adapter). Configuration is performed using Omron CX-Programmer or CX-Integrator software. Network parameters include node address (1-32), data link table (which determines the allocation of data between nodes), and communication cycle time. Up to 32 nodes can be connected per network segment. The PLC’s ladder program can access received data from other nodes using the network data link memory addresses. Send and receive message instructions (e.g., SEND, RECV) are available for message communications.

Applications

Typical applications of the CS1W-CLK13 include linking multiple production line PLCs for coordinated control (e.g., automotive assembly lines), remote I/O monitoring in material handling systems, data collection from distributed process sensors to a central PLC, and synchronization of conveyor systems, packaging machines, and palletizers. The optical fiber interface also makes the unit suitable for installations in high-EMI environments such as welding stations and electroplating lines.

Installation and Commissioning

Install the CS1W-CLK13 into the CS1 rack, ensuring the unit’s edge connector properly engages the rack backplane. Secure the unit with the mounting screws. Connect the H-PCF fiber optic cable to the unit’s optical connector, ensuring the transmit and receive fibers are correctly connected to the adjacent node. Use the supplied cable fixing bracket to prevent strain on the connector. Set the node address using the DIP switches on the unit’s front panel. Power on the CS1 system and verify that the unit’s LED indicators show normal status (green RUN LED). Using CX-Integrator, configure the data link tables and message communication parameters. Test the network by writing and reading data between nodes. For systems requiring high availability, a redundant controller link configuration can be implemented using a CS1D Duplex System.

Diagnostics and Maintenance

The CS1W-CLK13 provides LED indicators for power (PWR), communication activity (LNK), and error status (ERR). If the ERR LED illuminates, check for network configuration mismatches, cable breaks, or node address conflicts. The unit’s status can be monitored from the PLC program using system-defined words and bits. Routine maintenance includes inspecting the optical fiber connectors for dust or damage and cleaning them with fiber optic cleaning tools. The unit requires no periodic calibration.

Environmental and Compliance

The CS1W-CLK13 is CE certified and RoHS compliant. Operating temperature range: -20°C to +55°C. Storage temperature: -25°C to +65°C. Humidity: 10% to 90% non-condensing. The unit is designed for installation in pollution degree 2 control cabinets. The optical fiber interface is classified as Class 1 LED product per IEC 60825-1 safety standards.

Conclusion

The Omron CS1W-CLK13 Controller Link unit provides reliable, noise-immune optical fiber networking for CS1 series PLC systems. Its deterministic cyclic data exchange, message communication capabilities, and easy integration with CX-Integrator make it a suitable choice for distributed factory automation networks.