Description
3G8F5-CLK01 is a Controller Link Support Board manufactured by OMRON Corporation, designed specifically for the CVM1, CVM1-V, CV500, CV1000, and CV2000 series programmable logic controllers. This internal expansion board installs directly into the CPU base unit’s dedicated slot, enabling legacy CV-series PLCs to participate in a Controller Link industrial network.
The 3G8F5-CLK01 provides deterministic, token-passing network connectivity at 1.5 Mbps over shielded twisted-pair cable, supporting up to 32 nodes with Data Link Table functionality for seamless PLC-to-PLC data sharing without custom communication programming. The board’s PCB marking is 3G8F5-CLK01, while the order code is 3G8F5-CLK21-E—both identifiers refer to the same ISA bus interface board.
Application Scenarios
In an automotive body welding line, multiple OMRON CV1000 PLCs previously operated as isolated controllers, requiring complex serial communication programming to coordinate robot stations and conveyor movements. Timing delays and synchronization errors frequently disrupted production flow. After integrating 3G8F5-CLK01 boards into each PLC’s CPU base, the system achieved deterministic data sharing via Controller Link network. The Data Link Table function enabled each PLC to read critical process data from other stations with millisecond-level synchronization, eliminating programming complexity and improving line throughput by 15% while reducing communication-related downtime.
In a water treatment facility spanning multiple buildings, remote I/O stations and HMI terminals needed reliable communication with a central CVM1 controller. The 3G8F5-CLK01 served as the network interface, connecting the PLC to Controller Link over RS-485 shielded twisted-pair cable spanning up to 500 meters. The board’s differential signal design provided high noise immunity in electrically noisy motor control center environments, preventing data corruption and process interruptions.
Parameters
| Main Parameters | Value / Description |
|---|---|
| Product Model | 3G8F5-CLK01 (PCB marking) / 3G8F5-CLK21-E (order code) |
| Manufacturer | OMRON Corporation |
| Product Category | Controller Link Support Board (Internal Expansion Type) |
| Compatible PLC Series | CVM1, CVM1-V, CV500, CV1000, CV2000 |
| Incompatible Series | CS1, CJ1, CJ2 (require different models) |
| Communication Protocol | Controller Link (FINS-based, Data Link Table support) |
| Physical Layer | RS-485 Differential Signal, Shielded Twisted-Pair |
| Communication Rate | 1.5 Mbps (fixed, not software-configurable) |
| Maximum Nodes | 32 stations (including one master) |
| Maximum Cable Length | 500 m (no repeater) |
| Data Link Capacity | Up to 32 data link tables, 10 words per table |
| Interface Type | DB-style communication connector |
| Terminating Resistance | Onboard DIP switch, 120Ω ON/OFF |
| Status Indicators | RUN / ERR / CLK LEDs |
| Power Supply | PLC backplane bus (5V DC, typical <2W consumption) |
| Operating Temperature | 0°C to +55°C |
| Configuration Software | SYSWIN / CX-Programmer / CX-Integrator |
| Bus Interface | ISA (replaced by PCI interface model 3G8F7-CLK21-EV1) |
