Product Overview

The Allen-Bradley 1769-L30ER-NSE belongs to the CompactLogix 5370 L3 family, specifically engineered for high-security facilities and volatile atmospheres. The "NSE" designation identifies this unit as a No-Stored Energy controller. Unlike standard PLCs, this model eliminates internal capacitors and batteries, ensuring the device remains completely inert immediately upon power disconnection. This architecture serves underground mining operations and explosive environments where residual electrical energy poses a significant ignition risk. We offer this unit as 100% Brand New and Original factory stock.

Technical Specifications

The 1769-L30ER-NSE balances specialized safety constraints with the high-performance capabilities of the 5370 series.

Engineering Advantages

• Elimination of Ignition Risks: By removing energy-storing components, the 1769-L30ER-NSE meets the stringent "zero residual energy" requirements of hazardous zones. This design prevents accidental sparks during maintenance or emergency shutdowns in explosive atmospheres.

• Automatic Application Recovery: Since the internal memory is volatile and holds no charge, the system utilizes the mandatory SD card slot to automatically reload the application program and firmware during every power-up cycle.

• Dual-Port EtherNet/IP: The integrated dual ports support Device Level Ring (DLR) topologies. This provides network resiliency, ensuring your safety-critical system continues to communicate even if one segment of the fiber or copper ring fails.

• Streamlined Maintenance: The battery-less design eliminates the need for scheduled battery replacement cycles, reducing long-term maintenance costs and accidental downtime in remote locations like underground mines.

FAQs

• How does the 1769-L30ER-NSE retain the user program after power loss?

  Because it contains no stored energy, the controller loses all data in the internal volatile memory upon power-down. You must install an SD card (1784-SD1 or SD2) containing the saved project; the controller automatically loads this image every time power returns.

• Can I replace a standard 1769-L30ER with the 1769-L30ER-NSE?

  Yes, provided your application fits within the 1 MB memory limit and 16-node EtherNet/IP constraint. The NSE version offers the same processing power but adds the specific "No-Stored Energy" safety profile required for hazardous areas.

• Does the Real-Time Clock (RTC) reset after power disconnection?

  Yes. Without internal capacitors or batteries, the RTC does not maintain time during power loss. If your application requires timestamping, you should synchronize the clock via a Network Time Protocol (NTP) server upon power-up.

• What is the condition of this product?

  We sell only 100% Brand New and Original Allen-Bradley hardware. Each 1769-L30ER-NSE arrives in its original factory packaging with the standard manufacturer warranty.