Allen-Bradley 5069-L310ER-NSE CompactLogix 5380 No-Stored-Energy Controller

The 5069-L310ER-NSE is a specialized version of the CompactLogix 5380 controller designed for environments where "stored energy" is a safety or security risk. While it retains the core high-performance characteristics of the 5380 series, it is specifically engineered for hazardous or restricted areas—such as mining, explosives manufacturing, or highly secure data centers—where traditional energy-storing capacitors are prohibited.

Key Technical Specifications

Core Capabilities

1. No Stored Energy (NSE) Technology

Standard CompactLogix controllers use internal energy storage modules (capacitors) to write data to non-volatile memory during a power loss. The NSE version removes these components. This ensures that when power is cut, the energy dissipated is below the threshold required to trigger an ignition in explosive atmospheres, meeting strict Hazardous Area and Intrinsically Safe requirements.

2. Dual Gigabit Ethernet & High-Speed Performance

Despite its specialized safety features, it maintains the performance of the 5380 series:

• Gigabit Throughput: Dual 1-Gbps ports support high-speed data exchange.

• Dual-IP Mode: Allows for network segmentation, isolating machine-level I/O traffic from higher-level enterprise networks.

• DLR Support: Supports Device Level Ring for high network availability.

3. High-Speed 5069 Backplane

It utilizes the 5069 Compact I/O platform, which provides much faster scan times and higher accuracy for time-critical applications compared to the older 1769 series.

Technical FAQs

How does the NSE version handle data during power loss?

Because the 5069-L310ER-NSE lacks the internal energy to write data to the SD card during an unexpected power down, any data not already saved to the non-volatile memory (or synchronized to a SCADA/DB system) will be lost. In these applications, engineers typically use an external Uninterruptible Power Supply (UPS) if data retention is critical.

Can I use this for motion control?

No. The 5069-L310ER-NSE does not have the "M" designation. If you require integrated motion in a no-stored-energy format, you would need to look for an "ERM-NSE" variant, though the L310ER-NSE is primarily used for discrete and process logic.

What is the "SA Power" and "MOD Power" on this unit?

The 5069 architecture separates the power feeds:

• MOD Power: Powers the internal controller logic.

• SA Power: Powers the field-side circuitry of the I/O modules. Both must be wired via a removable terminal block (RTB).

Engineering & Installation Guide

• External Power Dependency: Since this unit cannot back itself up, ensure your application logic is designed for "clean" restarts. Use the 1784-SD2 card to store the project, but be aware that tag values will revert to their last saved state upon power cycling.

• Mounting: Standard horizontal DIN rail mounting. Like other 5380 controllers, it requires adequate spacing for thermal dissipation as the high-speed processor generates significant heat.

• Secure Environments: The NSE series is frequently mandated in secure government or military facilities where the ability of a device to hold a charge (and thus potentially maintain data in memory) after power removal is viewed as a security vulnerability.

Engineering Advantages

The 5069-L310ER-NSE is the industry standard for Hazardous Location Safety. It allows plant managers to deploy a high-speed, modern Logix controller into zones where they previously had to rely on older, less capable technology. By eliminating stored energy, Rockwell has provided a path to modernize explosives handling, chemical processing, and underground mining operations without compromising safety protocols.