ALLEN BRADLEY 1769-L30ER-NSE CompactLogix 5370 Controller

The ALLEN BRADLEY 1769-L30ER-NSE, also cataloged as the 1769-L30ER-NSE Processor Module, operates as a dedicated hardware component for logic execution and network coordination within CompactLogix 5370 L3 control systems. Configured with 1 MB of user memory and dual RJ45 EtherNet/IP ports with Device Level Ring (DLR) capability, the unit processes discrete and batch control tasks without integrated motion/servo axis execution. The controller manages up to 8 local 1769 I/O modules directly, executing EtherNet/IP socket interfaces and scheduled implicit I/O messaging across 16 EtherNet/IP nodes.

Hardware Specifications

Deterministic Network Performance & Backplane Velocity

The 1769-L30ER-NSE processes high-speed application code over EtherNet/IP deterministic networks, maintaining backplane bus communication velocity across local and distributed 1769 Compact I/O expansion banks. The dual Ethernet port architecture executes embedded DLR protocol logic to provide single-fault ring recovery without packet loss or cycle time jitter. Full firmware flash compatibility via Studio 5000 Logix Designer allows seamless network configuration, socket-level communication, and real-time state execution across Series A and Series B platform revisions.

Frequently Asked Questions

Q: What does the "NSE" designation in the 1769-L30ER-NSE part number signify?

A: "NSE" stands for No Servo Edition, meaning the controller firmware excludes CIP Motion support, making it dedicated strictly to standard discrete, batch, and process control tasks.

Q: Does the 1769-L30ER-NSE support hot-swapping or removal under power on the 1769 backplane?

A: No, 1769 backplane assemblies do not support Removal and Insertion Under Power (RIUP); electrical power to the controller and bus bank must be isolated before physical insertion or removal.

Field Installation Guidelines

Mount the 1769-L30ER-NSE controller onto an IEC standard DIN rail or flat panel surface using the retractable mounting feet, ensuring the right-side bus lever lock fully engages with the adjacent 1769 I/O module or end cap. Observe the power supply distance rating, placing the controller within 4 slot locations of the 1769 power supply module.

Connect industrial-grade Category 5e shielded twisted-pair (STP) Ethernet cables to the dual RJ45 ports for DLR or star network topology. Route communication cables and USB lines away from high-voltage AC conductors and motor drives to prevent noise coupling. Verify that the grounding conductor connects directly to the central enclosure ground bus according to local industrial wiring standards.