FUJI NP4H-SWN PC Loader | USB to RS-422

This personal computer loader provides programming and monitoring capability for FUJI MICREX-SX PLCs. It connects a standard PC to the PLC for program upload and download. Therefore, it enables efficient development and debugging of automation applications.

Physical and Interface Specifications

The FUJI NP4H-SWN measures 8.0 cm in length and 5.5 cm in width. Moreover, its loader weight equals approximately 0.08 kg for portable use. A single 9-pin D-sub connector interfaces with the PLC programming port. Additionally, this loader includes a USB cable for connection to a personal computer.

Parameter	Specification
Brand	FUJI Electric
Full Model	NP4H-SWN
Category	Personal Computer Loader (Programming Interface)
Dimensions (L x W x H)	8.0 cm x 5.5 cm x 2.0 cm (3.15″ x 2.17″ x 0.79″)
Loader Weight	0.08 kg (0.18 lbs)
PLC Interface	1 x 9-pin D-Sub Male (RS-422)
PC Interface	1 x USB Type B (2.0 Compliant)
Cable Length (PLC Side)	2.0 meters (6.56 feet) Attached
Cable Length (PC Side)	1.0 meter (3.28 feet) Attached
Supported Protocols	FUJI Proprietary + Modbus RTU
Baud Rate (PLC Port)	9600 to 115200 baud (Auto Detect)
USB Baud Rate	12 Mbps (Full Speed)
Isolation Rating	1500 Vrms (PLC Port to USB Port)
Power Supply	5 VDC from USB Port (No External Supply Needed)
Power Consumption	0.5 W (Typical)
Compatible PLCs	MICREX-SX Series (NP1, NP4, NP5)
Supported Software	D300win + MICREX-SX Standard
Operating System Support	Windows 7, 8, 10, 11 (32/64-bit)
Driver Requirement	Yes (Provided on CD or Download)
On-Board Components	1 USB Controller + 1 RS-422 Transceiver + 2 Optocouplers + 1 Isolation Transformer + 1 Voltage Regulator + 4 Protection Diodes + 1 EEPROM + 1 LED Driver
Energy Storage	2 x 47 µF Electrolytic Capacitors (16V) + 2 x 10 µF Tantalum (10V)
Operating Temperature	0°C to +50°C (32°F to 122°F)
Storage Temperature	-20°C to +70°C (-4°F to 158°F)
Status Indicators	1 Green LED (Power) + 1 Yellow LED (USB Active) + 1 Red LED (PLC Communication)

Programming Interface and Connectivity

The FUJI NP4H-SWN converts USB signals to RS-422 for MICREX-SX PLC compatibility. Specifically, the loaders connects a standard Windows PC to the PLC programming port. In addition, the RS-422 interface supports cable runs up to 500 meters for remote programming. Moreover, the USB port draws power directly from the computer without external supplies. Furthermore, the loader supports auto-baud detection from 9600 to 115200 baud. Consequently, you can program and monitor PLCs from a laptop in the field easily.

Isolation and Electrical Protection

This personal computer loader includes galvanic isolation between the PC and PLC. Specifically, isolation transformers and optocouplers provide 1500 Vrms of protection. In addition, this isolation prevents ground loops from damaging the computer or PLC. Moreover, the loader protects against voltage spikes on long communication cables. Thus, you can safely connect a laptop to a live PLC in industrial environments.

Energy Storage and Operational Stability

This loader stores energy using four onboard capacitors for power filtering. Specifically, two electrolytic capacitors smooth the 5 VDC USB supply for stable operation. In addition, two tantalum capacitors provide high-frequency noise suppression for communication circuits. Furthermore, these capacitors maintain data integrity during brief USB power interruptions. Therefore, the FUJI NP4H-SWN provides reliable programming connectivity in the field.

Installation and Status Indicators

Three LED indicators provide operational status at a glance on this loader. First, a green Power LED lights when the USB cable supplies 5 VDC power. Second, a yellow USB Active LED flashes during data transfer with the computer. Third, a red PLC Communication LED illuminates during program upload or download. Additionally, the loader includes a driver CD for Windows installation. Thus, you can diagnose connection status instantly without software tools.