FUJI FTU257B PLC Module | 24 Inputs

This compact PLC module provides integrated control for medium-scale automation applications. The FUJI FTU257B combines CPU, I/O, and communication ports in a single unit. Twenty-four digital inputs and sixteen digital outputs handle diverse discrete control tasks. Consequently, machine builders can automate packaging lines, conveyors, and assembly cells efficiently.

Technical Specifications of the PLC Module

The FUJI FTU257B measures 180 mm in width and 110 mm in height. Its depth reaches 85 mm for DIN rail or panel mounting. The module weighs approximately 0.85 kg including all processing and I/O circuitry. A front panel LED array shows input status, output status, and processor run condition. The top side features a built-in RS-232 port and removable terminal blocks. This design stores minimal energy in small filtering capacitors only. Therefore, the PLC contains no batteries for program retention.

Parameter	Specification
Brand	Fuji Electric
Full Model	FTU257B
Category	PLC Module
Dimensions (W x H x D)	180 mm x 110 mm x 85 mm
Weight	Approximately 0.85 kg
Digital Inputs	24 channels, 24V DC
Digital Outputs	16 channels, relay, 2A each
User Program Memory	16 KB (ladder logic)
Execution Speed	0.8 µs per basic instruction
Data Memory	8 KB
Timers/Counters	512 each
Communication Port	RS-232 (programming/HMI)
Terminal Type	Removable screw blocks
Energy Storage	Minimal (filtering only)
Supply Voltage	24V DC external
Backup Method	Flash memory (no battery)

Functional Features and Integrated Control

The FUJI FTU257B executes ladder logic programs with 0.8 µs per instruction. You can store up to 16,000 steps of user code in onboard Flash memory. The relay outputs switch 2A at 24V DC or 250V AC loads directly. A built-in RS-232 port allows programming and HMI connection without extra modules. Consequently, this compact PLC eliminates separate racks and power supplies for many applications.

Installation and System Integration

You must mount this PLC module on standard 35mm DIN rail or a flat panel. The FUJI FTU257B requires a 24V DC power supply for operation. Removable terminal blocks accept field wiring from 14 to 22 AWG. The module also supports simple networking with other FTU units and HMIs. Always verify sensor wiring before applying power to the system.

Maintenance and Operational Benefits

Because the FUJI FTU257B stores user programs in Flash memory, it needs no battery backup. Technicians can remove power without losing any ladder logic or configuration data. The PLC retains all program and register values indefinitely after programming. Consequently, this compact controller offers reliable service for stand-alone and networked machine control applications.