Allen-Bradley 1769-L18ERM-BB1B CompactLogix 5370 L1 Ethernet Processor Module

Configured for integrated motion and logic control in machine applications, the Allen-Bradley 1769-L18ERM-BB1B (1769-L18ERM-BB1B Processor Module) provides direct physical execution of task-based control and EtherNet/IP communication across CompactLogix platforms.

Hardware Specifications

Profinet / EtherNet/IP Deterministic Networks

The 1769-L18ERM-BB1B implements deterministic EtherNet/IP communication, supporting Linear, Star, and Device Level Ring (DLR) topologies to maintain network uptime in time-critical applications. The module supports I/O density scaling via the integration of up to 8 local 1769-series Compact I/O modules. Firmware flash compatibility is managed through the Studio 5000 environment, allowing for version control and feature upgrades across the CompactLogix 5370 L1 family. Deterministic motion execution is supported through the integrated motion engine, which coordinates up to 2 axes with microsecond-level synchronization precision.

Frequently Asked Questions

Q: Can the 1769-L18ERM-BB1B be hot-swapped during machine operation?

A: No, the module does not support Removal and Insertion Under Power (RIUP). Any modification to the controller or the connected 1769-series I/O bus must be performed after de-energizing the main power supply to prevent backplane arcing and potential circuit damage.

Q: How many nodes are supported on the Ethernet ports?

A: The controller supports up to 8 Ethernet nodes. When designing the network topology, ensure that the total node count and traffic load remain within the bandwidth constraints of the integrated EtherNet/IP ports to maintain deterministic I/O performance.

Field Installation Guidelines

1. Mount the module on a 35 mm DIN rail; ensure the latching mechanism is fully engaged to provide a stable electrical connection to the backplane.
2. Terminate 24 VDC power using copper wiring rated for 90 deg C; utilize 22 to 14 AWG wire sizes for the screw terminals to ensure secure contact.
3. Use the 1769-RTBN18 replacement terminal block for field wiring connections, ensuring all screws are torqued according to manufacturer specifications.
4. Route Ethernet cabling through dedicated, shielded conduits away from high-current motor leads to prevent electromagnetic interference (EMI) on the communication bus.
5. Verify the DLR ring topology configuration by ensuring the "Ring" status indicators on the Ethernet ports are active and correctly mapped in the controller software.