Fuji FPC121T PLC Module | Compact Controller

Processing Architecture and Control Capabilities

The Fuji FPC121T functions as a compact programmable logic controller module for small to mid-sized automation applications. It executes user programs with reliable scan times for sequence and logic control tasks. This module integrates CPU and I/O functionality into a single compact unit. It manages machine control, process monitoring, and data handling efficiently in space-constrained installations.

This PLC module contains onboard program memory that stores user applications and system parameters. It features EEPROM technology that retains programs without battery backup during power loss. Consequently, users can restore operation immediately after system power cycles without program reloading.

Physical Specifications and I/O Configuration

The FPC121T measures 9.0 cm in height, 7.5 cm in width, and 6.0 cm in depth. It weighs approximately 0.18 kg, allowing for flexible mounting in control cabinets and enclosures. This compact unit features integrated mounting tabs for DIN rail or panel installation. The front panel includes LED indicators for power, run, and I/O status monitoring. These visual indicators provide immediate feedback during system startup and troubleshooting.

This module provides 12 digital input points and 8 digital output points for field device connectivity. The input channels accept 24 VDC signals from sensors, switches, and other field devices. The output channels deliver 0.5 Amps per point at 24 VDC for controlling relays and small actuators.

Energy Storage and Data Retention

The FPC121T incorporates energy storage capacitors that maintain real-time clock operation during brief power interruptions. These capacitors provide approximately 5 days of clock retention at rated temperature conditions. The module also features EEPROM memory that preserves user programs without external battery support. This design eliminates the need for regular battery replacement in critical applications.

Technical Specifications

Parameter	Specification
Manufacturer	Fuji Electric
Model	FPC121T
Category	PLC Module / Compact Controller
Series	FPC Series
Input Points	12 points, 24 VDC
Output Points	8 points, transistor type
Output Current	0.5 A per point
Memory Type	EEPROM, non-volatile
Dimensions (H x W x D)	9.0 cm x 7.5 cm x 6.0 cm
Weight	0.18 kg
Mounting	DIN rail or panel mount
Clock Retention	5 days (capacitor backup)

System Integration and Programming

The FPC121T serves as a standalone controller for small automation systems or as a remote I/O device. It supports programming through Fuji standard software or handheld programmers for flexible configuration options. Users can connect this module to operator interfaces and other controllers through serial communication ports. This compact design makes it ideal for conveyor control, packaging machines, and small process automation applications.