FUJI NP1W6406U Digital I/O Module

This digital I/O module combines inputs and outputs for Fuji MICREX-SX PLC systems. The FUJI NP1W6406U features sixty-four discrete channels in a single compact assembly. Thirty-two input channels accept 24V DC signals from sensors and limit switches. Consequently, automation engineers can monitor field devices while controlling actuators from one module.

Technical Specifications of the Digital I/O Module

The FUJI NP1W6406U measures 113.6 mm in width and 90 mm in height. Its depth reaches 76 mm for standard MICREX-SX rack mounting. The module weighs approximately 0.35 kg including all I/O and isolation circuitry. A single front panel LED array shows power status and activity for each channel. The front side features two removable screw terminal blocks for field wiring connections. This design stores minimal energy in small filtering capacitors only. Therefore, the module contains no batteries or large energy storage elements.

Parameter	Specification
Brand	Fuji Electric
Full Model	NP1W6406U
Category	Digital I/O Module
Dimensions (W x H x D)	113.6 mm x 90 mm x 76 mm
Weight	Approximately 0.35 kg
Digital Inputs	32 channels, 24V DC
Digital Outputs	32 channels, 24V DC
Input Current	7 mA typical per channel
Output Current	0.3A per channel, 4A per common
Response Time	2 ms (inputs), 1 ms (outputs)
Isolation	1500V AC optical per group
Terminal Type	2 x removable screw blocks
Energy Storage	Minimal (filtering only)
Supply Voltage	5V DC from backplane, 24V DC field power

Functional Features and Channel Configuration

The FUJI NP1W6406U provides optical isolation between field circuits and the backplane. You can connect sinking or sourcing field devices without changing jumpers. The module automatically reports input changes and output faults to the CPU. Each output channel includes short circuit and overcurrent protection. Consequently, maintenance teams can identify faulty circuits instantly using the channel LEDs.

Installation and System Integration

You must install this digital I/O module into a standard MICREX-SX rack slot. The FUJI NP1W6406U communicates with the CPU through the high-speed backplane. Two removable terminal blocks accept field wiring from 14 to 22 AWG. The module requires an external 24V DC supply for output field power. Always verify common wiring before connecting multiple loads to one terminal.

Maintenance and Operational Benefits

Because the FUJI NP1W6406U stores no battery-backed data, it needs no periodic battery changes. Technicians can replace the module without losing any configuration settings. The transparent terminal covers prevent accidental contact with live field wires. Consequently, this digital I/O module offers safe and simple maintenance for high-density control applications.