Technical Overview
The NP1AXH4DG-MR analog distributor module from Fuji Electric converts 4-20mA signals from two-wire transmitters into digital data for MICREX-SX series PLCs. This module features four isolated input channels, each with a built-in 24V DC power supply for the transmitters. High dielectric strength isolation (1kV AC) between channels eliminates the need for external transducers. Additionally, the module achieves 16-bit resolution with a measurement accuracy of ±0.1%.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Fuji Electric |
| Model Number | NP1AXH4DG-MR |
| Product Type | Analog Distributor Module |
| Series | MICREX-SX |
| Number of Inputs | 4 channels (isolated) |
| Analog Input Range | 4-20mA or 0-20mA |
| Input Impedance | 250Ω |
| Maximum Permissible Input | 30mA |
| Resolution | 16 bits |
| Digital Value (INT type) | 0 to 32,000 |
| Measurement Accuracy | ±0.1% of FSR (Ta=25°C) |
| Temperature Coefficient | ±0.007%/°C |
| Conversion Cycle | 30ms/4 channels |
| Transmitter Power Supply | 24V DC ±15%, 23mA max. per channel |
| Isolation | 1kV AC between channels and FG |
| Internal Current Consumption | 390mA max. (with transmitter supply) |
| Mass | Approx. 290g |
| Dimensions (W x H x D) | 35 x 105 x 111mm (protrusion: 26mm) |
| External Connections | Removable screw terminal block (M3 x 20 poles) |
| Status | Current product |
Advanced Channel Isolation and Built-in Power Supply
The module provides high-pressure resistance insulation (1kV AC) between each analog input channel and between I/O terminals and FG. This isolation eliminates ground loop issues and protects the controller from field wiring faults. Furthermore, each channel incorporates a 24V DC power supply for two-wire transmitters, removing the need for external power sources. A current limiter restricts short-circuit current to approximately 25mA for safety.
High Precision and Flexible Configuration
The NP1AXH4DG-MR delivers 16-bit resolution and ±0.1% measurement accuracy for precise process value acquisition. Users can select input ranges (4-20mA or 0-20mA) via a rear-panel rotary switch. The module also includes a selectable square root extraction function, ideal for flow meter applications. Moving average processing options (1, 8, 16, or 32 times) help filter out noise for stable readings.
System Integration and Application
This module occupies 8 input words and 4 output words of the PLC’s I/O memory. Its removable screw terminal block simplifies wiring and maintenance. The typical response time equals the conversion cycle (30ms) plus the tact cycle, with a step response time of approximately 56.6ms. Typical applications include differential pressure transmitters, level sensors, and temperature transmitters in process control and factory automation.
Details
| Weight | 0.7 kg |
|---|---|
| Dimensions | 2.5 × 20.3 × 15.2 mm |
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