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The 1769-L31ER-NSE (Part Number: 1769-L31ER-NSE) is a high-performance, mid-range programmable automation controller belonging to the CompactLogix 5370 L3 series. This specific "No-Stored-Energy" (NSE) version is engineered for specialized industrial environments, such as hazardous areas or high-security facilities, where...
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The 1769-L31ER-NSE (Part Number: 1769-L31ER-NSE) is a high-performance, mid-range programmable automation controller belonging to the CompactLogix 5370 L3 series. This specific "No-Stored-Energy" (NSE) version is engineered for specialized industrial environments, such as hazardous areas or high-security facilities, where it is mandatory for equipment to reach a zero-energy state almost instantly upon power removal. By eliminating large internal capacitors, the 1769-L31ER-NSE ensures no residual electrical energy remains stored, meeting strict safety de-energization protocols.
Equipped with dual EtherNet/IP ports, the controller supports Device Level Ring (DLR) topologies, allowing for network resiliency and simplified wiring. It offers a 1 MB user memory capacity and can manage up to 8 local 1769 Compact I/O modules. As a battery-less controller, it utilizes an included SD card for non-volatile memory storage, ensuring project data is preserved without the maintenance overhead of lithium batteries.
| Specification | Details |
|---|---|
| Communication Interface | 1 USB 2.0 Client Port (for programming and firmware updates) |
| I/O Capacity | Supports up to 8 local 1769 Compact I/O modules |
| Expansion Banks | Maximum of 3 I/O banks |
| Power Supply Distance Rating | 4 modules (must be within 4 slots of the power supply) |
| Non-Volatile Storage | 1 GB Secure Digital (SD) card included (Supports up to 2 GB) |
| Task Management | Supports up to 32 multitasking priorities |
| Dimensions | 118 mm x 35 mm x 91 mm |
| Weight | 0.17 kg |
| Operating Temperature | 0 to 60 °C (32 to 140 °F) |
The 1769-L31ER-NSE is primarily utilized in:
Oil and gas sector
Chemical processing industries
Mining operations where explosive atmospheres require Zero Energy State compliance
It is also an excellent choice for distributed control systems requiring a compact, high-speed Ethernet-enabled processor without the need for integrated motion.
Does the NSE model require a battery for program retention?
No, the 1769-L31ER-NSE uses the provided SD card for permanent storage. Because it is a No-Stored-Energy model, it does not use a battery or high-capacity capacitors to hold the program in volatile memory during power loss.
Can I use Device Level Ring (DLR) with this controller?
Yes, the dual Ethernet ports feature an embedded switch that fully supports DLR, which provides a fault-tolerant network path in case of a single cable failure.
