1769-L16ER-BB1B CL 5370 L1 Controller

1769-L16ER-BB1B is a CL 5370 L1 controller that executes Logix machine-control programs, handles 16 embedded DC inputs and 16 embedded DC outputs, and communicates over EtherNet/IP. Its configuration provides 384 KB user memory, two DLR-capable Ethernet ports and support for up to six POINT I/O expansion modules. It requires a suitable 24V DC supply, compatible 1734 POINT I/O hardware and a Studio 5000 version matched to the installed firmware.

1769-L16ER-BB1B uses two RJ45 EtherNet/IP ports as one embedded switch for linear or Device Level Ring wiring. The ports carry the same controller network traffic rather than creating two isolated controller interfaces. Network design must remain within the controller limit of four configured EtherNet/IP nodes and must follow the selected linear or DLR topology rules.

1769-L16ER-BB1B provides 16 embedded 24V DC sinking digital inputs and 16 embedded 24V DC sourcing digital outputs for direct machine signals. These channels are part of the controller base configuration and work alongside optional POINT I/O expansion. Before wiring or replacement, confirm field voltage, common connections, sinking-input logic and sourcing-output load requirements.

1769-L16ER-BB1B expands local machine I/O through the POINT Bus with up to six compatible 1734 POINT I/O modules and supports up to four EtherNet/IP nodes in the Logix Designer project. This capacity is a catalog-specific limit, so a project requiring more local modules or network nodes must use a controller configuration with higher supported capacity.

1769-L16ER-BB1B is a standard CL 5370 L1 controller and does not provide integrated CIP Motion axes. Its configuration is intended for logic, embedded digital I/O, POINT I/O expansion and EtherNet/IP communication. Applications requiring integrated motion should be checked against a motion-capable catalog number such as 1769-L18ERM-BB1B and the required drive/firmware combination.

1769-L16ER-BB1B provides 384 KB of user memory for the Logix project and uses an industrial Secure Digital card for backup, transfer and firmware operations. The standard configuration ships with a 1784-SD1 1 GB card and supports the 1784-SD2 2 GB option. Project size, controller firmware and SD-card image must match the target controller before restoration.

1769-L16ER-BB1B is listed by the manufacturer with Active lifecycle status and remains a CL 5370 L1 controller with 384 KB memory. A replacement must still match the hardware series, firmware revision, Studio 5000 Logix Designer compatibility and the saved project. Do not assume that another 1769-L1 catalog number is a drop-in substitute because memory, node, motion and expansion limits differ.

1769-L16ER-BB1B must be checked as the exact controller entity before it is used to restore control, embedded I/O and EtherNet/IP communication. Confirm 10…28.8V DC input power, field-power loading, 16-input sinking and 16-output sourcing wiring, POINT I/O module count, EtherNet/IP node count, network topology, mounting method, rear bumper requirement, controller series, firmware and project memory. Any mismatch can prevent startup or produce unsafe I/O behavior.