Technical Specifications Overview
The table below details the core technical parameters of this digital input module.
| Parameter | Specification |
|---|---|
| Model Number | NRDI02 |
| Product Type | Digital Input Module |
| Compatible System | ABB Procontrol P14 / AC 800M Series |
| Number of Inputs | 16 points (isolated) |
| Input Type | 24 VDC (sink/source configurable) |
| Rated Input Voltage | 24 VDC |
| Input Voltage Range | 18 VDC to 30 VDC |
| ON Voltage Threshold | ≥ 15 VDC |
| OFF Voltage Threshold | ≤ 5 VDC |
| Nominal Input Current | 6 mA per point (at 24 VDC) |
| ON Response Time | 0.5 ms (typical) |
| OFF Response Time | 1.0 ms (typical) |
| Internal Power Draw | 5 VDC, 100 mA |
| Dimensions (W x H x D) | 67 mm x 130 mm x 120 mm |
| Weight | 0.30 kg |
| Terminal Type | 34-point removable screw terminal block |
| Indicators | 16 green LEDs (one per input channel) |
| Isolation Voltage | 2500 VAC (between field and logic) |
| Input Filtering | Software-configurable (0.5 ms to 10 ms) |
High-Speed Digital Input Performance
The NRDI02 digital input module offers 16 high-speed input channels for monitoring field devices and sensors. This digital input module accepts a wide voltage range from 18 VDC to 30 VDC, ensuring compatibility with standard 24 VDC industrial control systems. Each channel draws a nominal current of 6 mA, placing a minimal load on the field power supply.
The module features a fast 0.5 ms ON response time and a 1.0 ms OFF response time. Consequently, this digital input module excels in high-speed counting, position sensing, and rapid machine interlocking applications. Users can configure the input filtering time from 0.5 ms to 10 ms through system software, allowing engineers to balance speed against noise immunity for different field conditions.
Flexible Sink/Source Configuration
This digital input module supports both sink and source wiring configurations, adapting easily to various sensor types without additional hardware. The 2500 VAC isolation provides robust protection between field circuits and the control logic, safeguarding the main processor from voltage transients and electrical noise. Each input channel includes built-in reverse polarity protection, preventing damage from incorrect wiring during installation.
Physical Design and Installation Details
This digital input module mounts directly onto the Procontrol P14 or AC 800M backplane, occupying a single slot. The module measures 67 mm in width, 130 mm in height, and 120 mm in depth, with a weight of 0.30 kg. A 34-point removable screw terminal block on the front panel accepts all field wiring connections, simplifying both installation and ongoing maintenance.
Sixteen green LEDs line the front face, with each LED indicating the real-time status of its corresponding input channel. Therefore, operators can verify sensor operation and troubleshoot wiring issues instantly without requiring a programming console. The screw terminals accommodate wires up to 2.5 mm² (AWG 14), ensuring reliable connections in demanding industrial environments.
Power and Environmental Specifications
The NRDI02 draws a modest 100 mA from the 5 VDC backplane, minimizing heat generation within the control rack. This digital input module operates reliably across a temperature range of 0°C to 60°C. It also withstands humidity from 5% to 95% (non-condensing) and resists vibration up to 2G at 10-150 Hz.
Details
| Weight | 0.30 kg |
|---|---|
| Dimensions | 67 × 130 × 120 mm |
