Panasonic FP2 Modules — FP2-C2L CPU Unit

Technical Dossier

Product Details And Specifications

Panasonic FP2 Series: Comprehensive Module Range and Technical Overview

The Panasonic FP2 series is a mid-to-high-end programmable logic controller (PLC) platform developed by Panasonic Industrial Devices SUNX (formerly Matsushita Electric Works). It has achieved significant installed-base penetration across global heavy industries including petrochemical plants, nuclear facility auxiliary systems, oil refineries, automotive assembly lines, and large-scale discrete manufacturing. The FP2 platform is characterized by its modular backplane architecture, high-speed instruction execution (0.08 µs/step for basic instructions), and broad I/O expansion capability supporting up to 1,600 I/O points per base unit. Its deterministic scan cycle and robust EMC tolerance made it a preferred choice for process-critical applications where reliability over multi-decade operational lifespans is mandatory.

The Evolution of FP2 Architecture

The FP2 series was introduced in the early 1990s as a successor to the FP3 and FP5 platforms, consolidating Panasonic's industrial PLC lineup into a unified modular backplane standard. The original FP2 architecture used a proprietary C-NET serial bus for inter-module communication and supported MEWNET-W0 token-ring networking for multi-PLC coordination.

In subsequent revisions, Panasonic introduced the FP2SH (Super High-speed) variant, which retained full physical and software compatibility with FP2 I/O modules while upgrading the CPU execution engine to 0.04 µs/step and expanding program memory to 120K steps. This backward compatibility is a defining characteristic of the FP2 ecosystem: I/O modules, power supply units, and communication adapters designed for the original FP2 backplane are mechanically and electrically interchangeable with FP2SH installations.

As the platform entered its maturity phase in the 2010s, Panasonic positioned the FP0R and FPX series as successors for new installations, while continuing to supply FP2/FP2SH spare parts to support the large global installed base. Many FP2 modules are now classified as end-of-life (EOL) or limited-availability, making third-party spare parts sourcing a critical operational requirement for facilities running FP2-based control systems.

FP2 Full Catalog & Functionalities (SKU List)

CPU Units

• FP2-C2L: Standard CPU, 32K-step program memory, built-in C-NET port, supports up to 1,600 I/O points.
• FP2-C2: Standard CPU, 32K-step memory, dual C-NET ports, enhanced network configuration support.
• FP2-C3: High-capacity CPU, 60K-step program memory, extended data register range (D0–D32765).
• FP2SH-C1: Super High-speed CPU, 32K steps, 0.04 µs basic instruction cycle, FP2-compatible backplane.
• FP2SH-C2: Super High-speed CPU, 60K steps, dual C-NET, expanded I/O mapping.
• FP2SH-C3: Super High-speed CPU, 120K steps, maximum memory configuration for complex ladder/SFC programs.

Digital Input (DI) Modules

• FP2-X16: 16-point DC24V digital input module, sink/source selectable, 5 ms input filter.
• FP2-X32: 32-point DC24V digital input module, high-density I/O expansion, 5 ms filter.
• FP2-X16T: 16-point transistor input, high-speed response (0.1 ms filter) for encoder/pulse applications.

Digital Output (DO) Modules

• FP2-Y16T: 16-point transistor output, NPN open-collector, 0.5A per point, DC5–24V load.
• FP2-Y16R: 16-point relay output, 2A per point, AC250V/DC30V rated, for high-current actuator control.
• FP2-Y32T: 32-point transistor output, high-density, 0.3A per point, NPN open-collector.

Analog I/O Modules

• FP2-AD4: 4-channel analog input, 12-bit resolution, 0–10V / 4–20mA selectable per channel.
• FP2-DA4: 4-channel analog output, 12-bit resolution, 0–10V / 4–20mA output range.
• FP2-AD8: 8-channel analog input, 12-bit, high-channel-count process signal acquisition.

Communication & Network Adapters

• FP2-CN1: C-NET master/slave communication adapter, RS485, supports MEWNET-W0 token-ring topology.
• FP2-ET1: Ethernet communication unit, 10BASE-T, MEWTOCOL-COM protocol, for SCADA/HMI integration.
• FP2-PRT: PROFIBUS-DP slave adapter, connects FP2 backplane to PROFIBUS master networks.

Power Supply Units

• FP2-PSA2: AC100–240V input power supply, 5VDC/3A + 24VDC/0.6A output, standard base unit supply.
• FP2-PSD2: DC24V input power supply, 5VDC/3A output, for DC-powered panel installations.

Sourcing Hard-to-Find & Obsolete FP2 Parts

A significant portion of the FP2 module catalog has transitioned to end-of-life or allocated-supply status. Panasonic's official distribution channels no longer stock many FP2 CPU units and specialty I/O modules as standard inventory items. For facilities operating FP2-based control systems — particularly in industries where a full control system migration is not operationally or economically viable — maintaining access to verified spare parts is a primary maintenance concern.

DriveKNMS maintains a dedicated inventory of Panasonic FP2 and FP2SH modules sourced through authorized secondary market channels. Our procurement process covers both active and discontinued part numbers, including CPU units (FP2-C2L, FP2-C2, FP2-C3), high-density I/O modules, analog signal modules, and communication adapters. All units are individually inspected prior to dispatch. We provide traceability documentation and support long-term maintenance agreements for facilities requiring guaranteed spare parts availability over multi-year horizons.

Quality Control for the FP2 Range

The FP2 backplane uses a proprietary parallel bus architecture for inter-module data transfer. Verification of module integrity requires functional testing under live backplane conditions, not solely static component inspection. DriveKNMS applies the following test protocol to all FP2 modules processed through our facility:

• Backplane Bus Integrity Test: Each module is seated in a reference FP2 backplane and powered through a calibrated FP2-PSA2 supply. Bus signal levels (5V logic, address/data lines) are verified against Panasonic's published electrical specifications.
• CPU Functional Verification: For CPU units including the FP2-C2L, a standard ladder program is loaded via FPWIN Pro software. Scan cycle time, I/O response, and C-NET port communication are verified against factory specification tolerances.
• I/O Channel-Level Testing: All input and output channels on DI/DO/AI/AO modules are individually stimulated and measured. Open channels, leakage current deviations, and relay contact resistance are recorded per channel.
• Thermal Burn-In: Modules are operated at rated load for a minimum of 4 hours at ambient temperature to screen for early-life component failures.
• Final Inspection & Labeling: Tested units are assigned a DriveKNMS inspection reference number and packaged in anti-static enclosures with desiccant for storage and transit protection.