Allen-Bradley 1769-L18ER-BB1B CompactLogix 5370 L1 Controller
The Allen-Bradley 1769-L18ER-BB1B, also cataloged as the 1769-L18ER-BB1B CompactLogix Controller, operates as a dedicated hardware component for integrated digital signal execution and network coordination within CompactLogix 5370 L1 platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-L18ER-BB1B |
| Brand | Allen-Bradley |
| Origin | Singapore |
| Weight | Standard CompactLogix L1 Assembly Mass |
| Dimensions | Standard CompactLogix 5370 L1 Form Factor |
| Operating Temp | 0 to +60 deg C |
| Power Consumption | 24 VDC Nominal Input (~11.5 W Power Dissipation at Full Load) |
| User Memory | 512 KB |
| Integrated I/O | 16 Digital Inputs (24 VDC Sink) / 16 Digital Outputs (24 VDC Source) |
| Local Expansion Capacity | Up to 6 1734 POINT I/O Modules across POINT Bus Backplane |
| Network Ports | 2 x RJ-45 Ethernet Ports (Device Level Ring / DLR Supported) |
| EtherNet/IP Node Limit | Up to 8 Nodes |
| Non-Volatile Memory | 1 GB SD Card Included (Supports Up to 2 GB) |
| Programming Port | USB 2.0 Full-Speed Port |
Backplane Bus Communication Velocity & Determinism
The Allen-Bradley 1769-L18ER-BB1B executes motion and discrete logic loops using its internal 512 KB user memory while driving an integrated POINT Bus local backplane interface. Communication across its dual Ethernet ports supports Device Level Ring (DLR) topologies and deterministic EtherNet/IP messaging across up to 8 network nodes without requiring external switches. The processor maintains continuous I/O density scaling and predictable backplane bus communication velocity across up to 6 local 1734 POINT I/O expansion modules, utilizing onboard energy storage for battery-free non-volatile memory retention during power cycles. Seamless firmware flash compatibility ensures synchronized system execution across hardware series revisions.
Frequently Asked Questions
Q: Does the 1769-L18ER-BB1B controller require a lithium battery for memory retention during system power loss?
A: No, the controller uses a battery-free design with internal energy storage technology that transfers active volatile data to the onboard SD card during an unexpected power shutdown.
Q: What is the expansion limit for local field I/O modules on the 1769-L18ER-BB1B backplane?
A: The processor directly supports an integrated bank of 16 digital inputs and 16 digital outputs, with local backplane expansion accommodating up to 6 1734 POINT I/O modules installed on its right side.
Field Installation Guidelines
Mount the controller securely onto a standard 35 mm DIN rail or panel surface using the integrated mounting latches, ensuring grounding straps maintain direct contact with a grounded metal backplate. Supply 24 VDC main power using shielded copper conductors connected to the designated power terminals. Wire embedded digital inputs and outputs with 22 to 14 AWG copper wire, keeping 24 VDC field signal lines segregated from high-voltage AC circuits and variable frequency drive cables. Route dual Ethernet cables through industrial-grade RJ-45 connectors, maintaining proper bend radius limits to prevent packet loss in DLR ring setups.
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| Warranty | 12 Months |
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