FUJI NP1X6406-W Input Module | 16 Ch 24V Digital MICREX-SX

This digital input module captures discrete signals for FUJI MICREX-SX automation systems. It interfaces directly with field sensors such as limit switches and proximity detectors. Therefore, it enables reliable status monitoring for industrial machine control applications.

Physical and Input Specifications

The FUJI NP1X6406-W measures 13.0 cm in length and 9.5 cm in width. Moreover, its module weight equals approximately 0.28 kg for DIN rail mounting. A single 20-pin removable terminal block handles all field wiring connections. Additionally, this module contains sixteen independent digital input channels.

Parameter	Specification
Brand	FUJI Electric
Full Model	NP1X6406-W
Category	Digital Input Module
Dimensions (L x W x H)	13.0 cm x 9.5 cm x 6.0 cm (5.12″ x 3.74″ x 2.36″)
Module Weight	0.28 kg (0.62 lbs)
Primary Interface	1 x 20-pin Removable Screw Terminal Block
Backplane Interface	1 x 48-pin Male Connector (MICREX-SX Rack)
Operating Voltage	24 VDC from Backplane (19.2 to 28.8 VDC)
Power Consumption	2.0 W (Typical)
Input Channels	16 Independent Channels
Input Type	Sink/Source (Selectable per Common Group)
Input Voltage Range	0 to 30 VDC
Input On-State Voltage	> 15 VDC
Input Off-State Voltage	< 5 VDC
Input On-State Current	7 mA Typical at 24 VDC
Input Impedance	3.4 kΩ
Input Response Time (On)	3 ms (Typical)
Input Response Time (Off)	3 ms (Typical)
Input Isolation	Optocoupler (1500 Vrms)
Common Configuration	16 Inputs Share Two Commons (8 per Group)
On-Board Components	16 Optocouplers + 16 Current Limiting Resistors + 4 Protection Diodes + 1 EMI Filter + 1 Voltage Regulator + 1 LED Driver IC
Energy Storage	2 x 100 µF Electrolytic Capacitors (35V) + 2 x 10 µF Tantalum (25V)
Operating Temperature	0°C to +55°C (32°F to 131°F)
Storage Temperature	-25°C to +85°C (-13°F to 185°F)
Mounting Type	DIN Rail or MICREX-SX PLC Rack
Status Indicators	16 Green LEDs (One per Channel) + 1 Green LED (Power)

Input Channel Features and Signal Processing

The FUJI NP1X6406-W accepts sixteen independent discrete input signals at 24 VDC. Specifically, each input includes an optocoupler for complete electrical isolation from the logic side. In addition, the input impedance of 3.4 kΩ suits standard industrial proximity sensors. Moreover, all sixteen channels respond within 3 milliseconds to signal changes. Consequently, this module captures fast field events without missing critical transitions.

High-Density Input Configuration

Sixteen input channels fit into a single MICREX-SX rack slot with this module. For instance, you can monitor up to sixteen limit switches or push buttons with one module. In addition, the two common groups allow mixed sink and source wiring if needed. Moreover, the removable terminal block accepts 18-22 AWG stranded or solid wires. Therefore, this module saves valuable rack space in large control systems.

Energy Storage and Operational Stability

This digital input module stores energy using four onboard capacitors for power filtering. Specifically, two electrolytic capacitors smooth the 24 VDC supply for stable optocoupler operation. In addition, two tantalum capacitors provide high-frequency noise suppression for the input circuits. Furthermore, these capacitors maintain stable operation during brief power interruptions. Thus, the FUJI NP1X6406-W continues functioning through minor supply dips reliably.

Installation and Diagnostic Indicators

Seventeen LED indicators provide operational status at a glance on this module. First, sixteen green LEDs light when each corresponding input receives an active 24 VDC signal. Second, a green Power LED indicates the presence of backplane operating voltage. Additionally, the module includes a locking lever for secure rack attachment. Thus, you can diagnose system status instantly without external tools or meters.