Omron CS1W-FLN22 Replacement for CS1 Series FL-net

Product Overview

Omron CS1W-FLN22 Replacement for CS1 Series FL-net: Smooth Migration & Legacy System Upgrade

The Omron CS1W-FLN22 is a dedicated FL-net (Factory LAN) communication unit designed for the Omron CS1 Series PLC platform. As industrial facilities transition away from aging SYSMAC CS1 control architectures — or seek to replace discontinued communication modules — the CS1W-FLN22 remains the authoritative drop-in solution for maintaining FL-net network integrity without requiring controller replacement or full system re-engineering.

This module mounts directly onto the CS1 Series CPU backplane alongside units such as the CS1W-BC083 or CS1W-BC103 expansion backplanes, occupying a single I/O slot. No additional wiring harness or adapter bracket is required. The module communicates with the CS1 CPU — including the CS1H-CPU67H, CS1H-CPU65H, and CS1G-CPU45H — via the internal backplane bus, eliminating the need for external cabling between the communication unit and the controller.

For sites migrating from older FL-net implementations built around the CS1W-FLN21 or early-generation SYSMAC NET link units, the CS1W-FLN22 provides a direct hardware replacement path. The module supports the FL-net Ver. 2.00 protocol standard, enabling coexistence with third-party FL-net devices from Mitsubishi, Fuji, and Hitachi on the same factory network segment. This cross-vendor compatibility is critical in brownfield retrofit projects where the PLC platform is being upgraded while the field network infrastructure remains in place.

Wiring compatibility is a primary concern during any control system migration. The CS1W-FLN22 connects to the FL-net segment via a standard 100BASE-TX Ethernet port (RJ-45), meaning existing CAT5e or CAT6 structured cabling can be reused without modification. Engineers replacing a failed CS1W-FLN21 or decommissioning a legacy SYSMAC LINK unit (CS1W-SLK21) will find that the physical installation footprint and connector type are consistent with the existing cabinet layout, minimizing downtime during the swap.

Power is supplied entirely through the CS1 backplane — the module draws 5 VDC from the rack power supply unit, such as the CS1W-PA207R or CS1W-PD025. No external 24 VDC wiring to the communication unit is required, simplifying the retrofit and reducing the risk of wiring errors during installation. The total current draw of the CS1W-FLN22 must be accounted for in the rack power budget alongside other installed units, including analog I/O modules (CS1W-AD081-V1), digital I/O units, and any motion control or position modules.

From a programming perspective, the CS1W-FLN22 is configured using CX-Programmer and CX-Integrator, the standard Omron engineering tools for the CS1 platform. Node address assignment, area word allocation, and network parameter settings are managed through the I/O table and network configuration screens — no custom ladder logic is required to initialize the module. Existing FL-net area word mappings from a predecessor unit can be exported and re-imported, significantly reducing re-commissioning time on the plant floor.

For facilities running hybrid architectures that include Omron NJ/NX Series controllers alongside legacy CS1 racks, the CS1W-FLN22 enables the CS1 subsystem to participate in the same FL-net segment as newer controllers, preserving data exchange between generations of equipment during a phased migration. This is particularly valuable in automotive, food processing, and semiconductor manufacturing environments where full system cutover is not operationally feasible.

Spare parts availability is a key procurement consideration for CS1 Series installations. The CS1W-FLN22 is stocked and available for immediate dispatch from our Xiamen warehouse. Each unit undergoes functional verification prior to shipment, covering communication initialization, node registration, and area data transfer. Units are shipped in anti-static packaging with full documentation.

Compatibility Comparison Table

Seamless Upgrade Solutions

A complete CS1 Series FL-net migration typically involves more than a single module swap. During retrofit planning, engineers commonly source the following components alongside the CS1W-FLN22: the CS1W-PA207R rack power supply to ensure adequate current headroom after adding the communication unit; CS1W-AD081-V1 analog input modules where legacy signal conditioning cards are being replaced; and CS1W-ID261 or CS1W-OD261 digital I/O units when expanding the I/O count as part of the modernization scope. For sites that also need to upgrade the HMI layer, the Omron NS12-TS01B-V2 touch panel integrates natively with CS1 CPUs via the serial or Ethernet port, requiring no additional gateway hardware. Where the existing control cabinet includes a CS1W-SCU21-V1 serial communications unit for legacy RS-232/RS-422 device connectivity, this unit can coexist in the same rack as the CS1W-FLN22 without slot conflict. Engineers decommissioning a CS1W-SLK21 SYSMAC LINK unit as part of the network consolidation to FL-net will find the slot freed by the SLK21 can be reallocated to additional I/O expansion. For programming and commissioning, a CS1W-CN226 peripheral port cable or USB-Serial adapter is required to connect a laptop running CX-Programmer to the CS1 CPU during the initial configuration of the FL-net node parameters.

Retrofit Guidance FAQ

Q: Can the CS1W-FLN22 replace a CS1W-FLN21 without modifying the ladder program?
A: In most cases, yes. The area word addresses used by the FLN21 can be replicated in the FLN22 configuration via CX-Integrator. Minor adjustments to the I/O table in CX-Programmer may be required to reflect the new unit registration.

Q: Is the RJ-45 port on the CS1W-FLN22 compatible with existing FL-net switch infrastructure?
A: Yes. The module uses standard 100BASE-TX, compatible with any managed or unmanaged industrial Ethernet switch supporting FL-net VLAN or flat network topologies.

Q: What is the physical slot requirement?
A: The CS1W-FLN22 occupies one CPU bus unit slot on any CS1 Series backplane (BC023, BC053, BC083, BC103). It cannot be installed in an expansion rack — it must be in the CPU rack.

Q: Does the module support simultaneous FL-net and EtherNet/IP communication?
A: No. The CS1W-FLN22 is dedicated to FL-net. For EtherNet/IP connectivity, a separate CS1W-EIP21 unit is required in an additional slot.

Q: How long does commissioning typically take after a direct swap?
A: For a like-for-like replacement with preserved configuration files, on-site commissioning typically takes 2–4 hours including network node re-registration and area data verification.

Warranty Assurance

Every CS1W-FLN22 unit supplied by TOPNLMS is covered by a 12-month warranty from the date of shipment. Prior to dispatch, each module undergoes a functional verification procedure covering power-on initialization, FL-net node registration, and area data communication. Units that do not pass verification are not shipped. In the event of a confirmed hardware defect within the warranty period, TOPNLMS will arrange replacement dispatch within 3 business days. Our technical support team is available to assist with installation queries, configuration guidance, and compatibility verification before and after purchase. Procurement teams can request a test report or inspection certificate upon order confirmation.