369B1843G5003 GE Nexus MDI50 Digital Input Module | 32-Channel

Architecture and Performance Overview

• Core Model: 369B1843G5003 MDI50, engineered for the GE Nexus system.
• Input Density: Features 32 independent digital input channels.
• Event Recording: Integrated 1ms high-precision SOE (Sequence of Events) functionality.
• Signal Support: Compatible with dry contact or sinking current inputs.
• Pulse Capability: The last 4 channels support 0–1.5kHz Pulse Input (PI) for frequency monitoring.

Technical Specification Data

• Operating Voltage: 48V DC interrogation voltage.
• Signal Filtering: Firmware adjustable (3–50ms); factory default is 24ms.
• Isolation: 500VAC channel-to-ground; 1500VAC channel-to-system isolation.
• Power Consumption: 1.2W typical; 8.5W maximum.
• Diagnostic Indicators: LEDs for channel status, module operation, communication, and fault alarms.

Oiltech Controls’s Insight: Applications and Deployment

• Typical Applications: Ideal for Emergency Shutdown Systems (ESD), power plant sequence control, and complex logic interlocking.
• Device Compatibility: Perfectly matches industrial sensors, limit switches, and frequency monitoring equipment.
• Selection Guide: Evaluate site signal noise levels to optimize filter settings for the best response time.
• Maintenance Tip: Use built-in diagnostic LEDs to significantly reduce field troubleshooting time.
• Expert Advice: Ensure proper grounding during installation to leverage the 1500VAC isolation for interference immunity.

Logistics, Warranty, and Documentation

• Fast Dispatch: Orders are processed and shipped within 24–28 hours.
• Shipping Partners: Reliable global delivery via FedEx, UPS, and DHL.
• Warranty Terms: All new units include a comprehensive 12-month quality guarantee.

Frequently Asked Questions (FAQ)

• Q: Why are the last 4 channels dedicated to pulse input?
  A: This design allows for low-frequency speed monitoring or flow accumulation without requiring extra modules, saving cabinet space.
• Q: What is the significance of 1ms SOE precision?
  A: It allows for precise reconstruction of fault sequences during trip analysis, capturing even micro-second contact jitters.
• Q: How do I manage input signal bouncing?
  A: Adjust the firmware filter from 3ms to 50ms. The default 24ms is suitable for most standard relay contacts.
• Q: Is this module a direct replacement for legacy systems?
  A: As a GE Nexus module, it adheres to standard bus protocols; however, always verify backplane compatibility and 48V power requirements first.
• Q: How can I reach technical support for a quote?
  A: For inquiries, contact us at info@oiltechcontrols.com or message us on WhatsApp: +86 158 8020 0923.

Copyright © 2026 Oiltech Controls Limited. https://www.oiltechcontrols.com/ All rights reserved.

All rights reserved.