Yokogawa NFDV161-P50 STARDOM 64-Channel Isolated Digital Input Module

Product Overview

The Yokogawa NFDV161-P50 serves as a specialized, ultra-high-density digital input module within the STARDOM autonomous control ecosystem. This module monitors 64 fully isolated discrete channels, making it a cornerstone for large-scale industrial deployments utilizing FCN-500, FCN-RTU, and FCJ controllers. Unlike standard input modules, the P50 variant features hardware-level pushbutton edge detection, allowing the system to capture momentary trigger events with extreme precision. We provide this unit as 100% Brand New, ensuring factory-original reliability for critical infrastructure and process control.

Part Number Breakdown

The NFDV161 series utilizes suffix codes to define specific functional capabilities and connection interfaces:

Technical Specifications

The NFDV161-P50 delivers robust signal processing across a wide thermal range, optimized for 24V DC logic.

• Input Channels: 64 (fully isolated)

• Rated Input Voltage: 24 V DC

• Input Voltage Range: 20 to 26.4 V DC

• Input OFF Voltage: < 5.0 V DC

• Input Current: 2.5 mA ±20% per channel

• Isolation Voltage: 2 kV AC (Input to System); 500 V AC (Between 16-channel commons)

• Input Response Time: < 8 ms (Status input)

• Minimum ON Detection: 20 ms (Pushbutton input)

• Max Current Consumption: 550 mA @ 5 V DC

• Operating Temperature: -20°C to +60°C

• Weight: 0.3 kg

• Condition: 100% Brand New and Original

Engineering Advantages

The NFDV161-P50 addresses the rigorous demands of modern plant automation through several engineering innovations:

• Advanced Edge Detection Logic: The "-P50" hardware enables edge detection for pushbutton inputs. This eliminates the risk of missing momentary contact closures that standard polling cycles might overlook, ensuring the controller captures every operator intervention or pulse signal.

• Superior Signal Integrity via Multi-Stage Isolation: The module provides 2 kV AC galvanic isolation from the system bus and 500 V AC isolation between each 16-channel common group. This architecture prevents ground loops and ensures that an electrical fault in one field segment does not propagate to the rest of the I/O rack.

• Massive Footprint Reduction: Processing 64 channels in a single slot drastically reduces the required number of I/O nests and cabinets. This 0.3 kg module optimizes space in crowded offshore platforms or compact RTU enclosures, lowering overall installation costs.

• Flexible Field Termination: The module supports both MIL-connector cables for rapid pre-fab wiring and pressure clamp terminals for secure, vibration-resistant field connections. The pressure clamps accommodate wire gauges from AWG 20 to 14, providing mechanical stability in high-vibration environments.

FAQs

How does the NFDV161-P50 differ from the P00 version?

The NFDV161-P50 includes specialized circuitry for pushbutton edge detection. While the P00 version handles general status inputs, the P50 variant ensures the system captures rapid "ON" pulses (minimum 20 ms) specifically required for manual override buttons and pulse-type field sensors.

What is the benefit of the 500 V AC isolation between commons?

The 64 channels occupy four groups of 16. The 500 V AC isolation between these groups allows you to utilize different 24V DC power sources for different sections of the module without risking cross-talk or circulating currents between the commons.

Can this module operate in extreme outdoor environments?

Yes. With an operating temperature range of -20°C to +60°C and a non-condensing humidity tolerance up to 95%, the NFDV161-P50 excels in field-mounted RTU cabinets and harsh industrial settings where temperature fluctuations are common.

What cabling is required for the MIL-connector option?

For high-density wiring, we recommend using Yokogawa-standard MIL-connector cables that break out into terminal boards. This setup simplifies troubleshooting and significantly reduces the time required for loop checks during commissioning.