FUJI FPU120S Processor Module

Board Overview

This processor module serves as the central control unit for SPH series systems. You can install FUJI FPU120S directly into the main rack of any SPH controller. The unit executes ladder logic and handles all communication tasks. It manages I/O scanning without external assistance from additional processors.

Technical Specifications

Parameter	Value
Dimensions (W x H x D)	70 mm x 100 mm x 85 mm
Weight	0.35 kg
Processor type	32-bit RISC CPU
Program execution speed	0.2 µs per logic step
Program memory	64 KB flash (approx. 32,000 steps)
Data memory	32 KB RAM with battery backup
I/O points supported	Up to 1024 local points
Communication ports	2 x RS-485 (Modbus RTU), 1 x RS-232
Interface to backplane	SPH bus connector
Total onboard components	168 discrete parts
Energy storage type	Lithium battery + super capacitor
Battery life	5 years typical (data retention)
Operating temperature	0°C to +55°C

Board Layout and Components

The PCB places the 32-bit CPU at the center for optimal signal routing. A lithium battery sits on the board for long-term data retention. Additionally, 168 discrete components include bus drivers and power regulation circuits. The super capacitor provides temporary backup during battery replacement. Consequently, program data remains safe even without main power.

Installation Process

You can mount FUJI FPU120S into the leftmost slot of any SPH rack. The backplane connector carries power, I/O buses, and inter-processor communication. Furthermore, front panel ports provide access to programming and network connections. LED indicators show CPU status, run mode, and error conditions clearly.

Performance Advantages

This module executes each logic step in just 0.2 microseconds. Therefore, large control programs scan in milliseconds rather than seconds. The 64 KB memory stores up to 32,000 steps of ladder logic easily. Battery-backed RAM also retains data through extended power outages.

Safety and Compliance

FUJI FPU120S meets CE and RoHS industrial standards. The unit discharges stored energy below 3V within five seconds. Hence, technicians face minimal electrical risk during module replacement.