Panasonic FP2-PSA3 Power Supply Module: FP2 Series Specs & Availability

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 modular programmable logic controller platform deployed extensively across global heavy industry sectors including petrochemical plants, nuclear facility auxiliary systems, oil refineries, automotive assembly lines, and continuous-process manufacturing. Introduced in the early 1990s, the FP2 platform established itself as a benchmark for high-density I/O expansion, deterministic scan-cycle performance, and robust backplane communication in environments demanding 24/7 uptime. Its rack-based architecture supports up to 1,800 I/O points per CPU unit, making it a preferred choice for large-scale distributed control applications where Siemens S5/S7 and Allen-Bradley PLC-5 platforms are the primary competitive alternatives. The FP2 series remains installed in a significant number of legacy facilities globally, and demand for spare modules — particularly power supply units, CPU boards, and I/O cards — continues from maintenance engineering teams operating under long-term asset management strategies.

The Evolution of FP2 Architecture

The FP2 platform was launched by Matsushita Electric Works (later rebranded Panasonic Industrial Devices) as a successor to the FP1 and FP3 compact PLC lines. The original FP2 architecture used a proprietary parallel backplane bus operating at TTL logic levels, with CPU modules communicating to I/O racks via a dedicated internal bus at fixed scan intervals. Early CPU variants — including the FP2-C1 and FP2-C2 — supported basic ladder logic with limited function block capability and a maximum program capacity of 32K steps.

The second-generation FP2 architecture introduced the FP2-C3 and FP2-C4 CPU modules, expanding program memory to 120K steps and adding support for floating-point arithmetic, PID control loops, and high-speed counter inputs. Communication options were extended through dedicated link modules supporting Ethernet (FL-net), PROFIBUS-DP, DeviceNet, and Panasonic's proprietary MEWNET-W0 network. The power supply subsystem evolved in parallel: the original FP2-PSA1 (100–240V AC, 5A output) was supplemented by the FP2-PSA2 (higher current rating) and the FP2-PSA3 — the subject of this listing — which provides a regulated 5VDC/8A and 24VDC/0.6A dual-rail output, suitable for fully populated racks with mixed analog and digital I/O modules. DC-input variants (FP2-PSD1, FP2-PSD2) were introduced for installations requiring 24VDC panel power without AC conversion stages.

As of 2020, Panasonic officially transitioned the FP2 series to end-of-life (EOL) status, recommending migration to the FP0H and FPX series for new designs. However, the installed base remains substantial, and no direct plug-compatible replacement exists for the FP2 rack-and-backplane architecture, making original spare parts the only viable option for ongoing maintenance without full system replacement.

FP2 Full Catalog & Functionalities (SKU List)

Power Supply Modules

• FP2-PSA1: AC input power supply, 5VDC/5A output, single-rail, standard rack
• FP2-PSA2: AC input power supply, 5VDC/6A output, enhanced current capacity
• FP2-PSA3: AC input power supply, 5VDC/8A + 24VDC/0.6A dual-rail output, full-rack load
• FP2-PSD1: DC 24V input power supply, 5VDC/5A output, panel DC bus compatible
• FP2-PSD2: DC 24V input power supply, 5VDC/8A output, high-density rack support

CPU Modules

• FP2-C1: Basic CPU, 32K steps, ladder logic, RS232C port
• FP2-C2: Standard CPU, 32K steps, dual RS232C, basic network support
• FP2-C3: Advanced CPU, 120K steps, floating-point, PID, high-speed counter
• FP2-C4: High-performance CPU, 120K steps, extended instruction set, dual-port memory

Digital Input (DI) Modules

• FP2-X16: 16-point DC24V digital input module, sink/source selectable
• FP2-X32: 32-point DC24V digital input module, high-density I/O expansion
• FP2-X64: 64-point DC24V digital input module, maximum density DI card

Digital Output (DO) Modules

• FP2-Y16T: 16-point transistor output module, NPN, 0.5A per point
• FP2-Y32T: 32-point transistor output module, NPN, high-density DO
• FP2-Y16R: 16-point relay output module, 2A per point, AC/DC load

Analog I/O Modules

• FP2-AN8: 8-channel analog input module, 12-bit resolution, 4–20mA / 0–10V
• FP2-AD4: 4-channel analog output module, 12-bit, 4–20mA / 0–10V

Communication & Network Modules

• FP2-ET1: Ethernet communication module, FL-net protocol, 10BASE-T
• FP2-PB1: PROFIBUS-DP slave module, up to 244 bytes I/O
• FP2-DN1: DeviceNet slave adapter module, Group 2 only server

Sourcing Hard-to-Find & Obsolete FP2 Parts

With the FP2 series at official EOL status, OEM supply channels have been closed or severely restricted. Panasonic's authorized distributors no longer carry new-production FP2 modules as standard stock items. For maintenance engineers and plant reliability teams, the practical sourcing options are limited to: certified refurbished units from specialist industrial automation distributors, new-old-stock (NOS) units from warehouse liquidations, and tested pull-out units recovered from decommissioned equipment.

DriveKNMS maintains a dedicated inventory program for FP2 lifecycle extension support. Our stock includes power supply modules (PSA and PSD variants), CPU boards across all four generations, and a broad range of DI, DO, and analog I/O cards. All units are sourced through verified supply chains and subjected to functional testing before dispatch. We provide documentation of test results on request and support emergency same-day quotation for critical plant maintenance scenarios. For obsolete FP2 modules not listed in our current stock, we operate an active procurement network to locate units within 3–10 business days in most cases.

Quality Control for the FP2 Range

The FP2 backplane uses a parallel bus architecture with TTL-level signaling, which is sensitive to degraded edge rates caused by aging bus transceivers or contaminated edge connectors. Our QC process for FP2 modules includes the following steps:

• Visual inspection of PCB for corrosion, burnt components, cracked solder joints, and capacitor bulge
• Backplane connector cleaning and contact resistance measurement (<50mΩ per pin)
• Power supply modules: load testing at 100%, 75%, and 50% rated output current with ripple voltage measurement
• CPU modules: full program load/execute cycle test using a reference FP2 rack with known-good I/O modules
• I/O modules: point-by-point functional verification using automated test fixtures simulating field wiring conditions
• Communication modules: protocol handshake verification on live network segment (FL-net, PROFIBUS, or DeviceNet as applicable)
• Burn-in: 48-hour powered soak at ambient 40°C prior to shipment for refurbished units