1769-L19ER-BB1B Allen Bradley CompactLogix 5370 L1 Controller
Manufacturer: Allen Bradley
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Part Number: 1769-L19ER-BB1B
Condition：New with Original Package
Product Type: CPU Processors
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Allen Bradley 1769-L19ER-BB1B CompactLogix 5370 L1 Controller
The Allen Bradley 1769-L19ER-BB1B serves as the primary 1769-L19ER-BB1B CompactLogix 5370 L1 Controller utilized to execute specific technical tasks across local I/O processing and EtherNet/IP communication networks. The hardware embeds a dedicated computing core that coordinates field instrumentation signals via built-in digital interfaces while sustaining simultaneous up-link parameters to peripheral node extensions without a separate communication card.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-L19ER-BB1B |
| Brand | Allen Bradley / Rockwell Automation |
| Origin | USA |
| Weight | 0.77 kg (1.69 lbs) |
| Dimensions | CompactLogix 5370 L1 Standard Profile |
| Operating Temp | 0 to 60 deg C |
| Storage Temp | -40 to +85 deg C |
| Power Consumption | 4.5 W typical, 11.5 W maximum power dissipation |
| User Memory | 1 MB |
| Non-volatile Storage | 1 GB SD card included (expandable up to 2 GB) |
| Embedded Digital Inputs | 16 digital DC inputs |
| Embedded Digital Outputs | 16 digital DC outputs |
| Backplane Current Draw | 1 A at 5 VDC (Alternative engineering metric: 560 mA at 5 VDC nominal) |
| Local Expansion Limits | Up to 8 additional modules |
| Communication Ports | Dual Ethernet (DLR capable), 1 USB port |
| Maximum System Nodes | Up to 20 EtherNet/IP nodes |
| Max Controller Connections | 256 connections |
| Max Network Sockets | 32 sockets |
| Isolation Voltage | 30 V continuous, basic insulation type |
| Vibration Tolerance | 10-500 Hz, 5 g |
| Shock Tolerance | 20 g (DIN rail mount), 30 g (panel mount) |
| Humidity Constraints | 0-95% non-condensing |
Deterministic Network Bus Integration
The 1769-L19ER-BB1B manages system performance parameters by stabilizing backplane bus communication velocity across 32 individual programming tasks, allowing up to 100 programs per task. Engineers configure the hardware for Profinet / EtherNet/IP deterministic networks, leveraging the embedded dual-port configuration to implement Device Level Ring (DLR) topologies that maintain network availability if a physical media break occurs. During initial power-up diagnostics, the processor runs internal checks to verify firmware flash compatibility against the hardware revision, protecting memory registers from unexpected halt states. The system applies explicit limits to I/O density scaling, restricting the configuration to 8 local expansion modules to prevent voltage attenuation across the internal electrical connections.
Frequently Asked Questions
Q: How does the system handle power distribution when adding local expansion modules to the 1769-L19ER-BB1B?
A: The controller draws its logic operating current directly from the backplane line, drawing up to 1 A at 5 VDC. Technicians must check the cumulative load parameters of all connected expansion units against the ratings of the compatible power supplies (1769-PA2, 1769-PA4, or 1769-PB4) to prevent bus voltage drops.
Q: What action is required to ensure proper industrial communication over the embedded USB port?
A: The integrated USB port functions strictly as a local configuration and programming interface link. Operators must use this port for temporary configuration uploads, system diagnostics, and firmware flash updates rather than continuous, industrial-grade field device control networks.
Q: Can the 1769-L19ER-BB1B manage more than 20 EtherNet/IP nodes if network bandwidth is available?
A: No. The internal processor firmware enforces a rigid threshold of 20 EtherNet/IP nodes. Exceeding this configured count blocks connection establishment to the additional external field nodes, requiring an upgrade to an L3 series controller to expand the network structure.
Field Installation Guidelines
- Enclosure Grounding Path: Fasten a low-impedance copper strap from the protective earth terminal of the chassis assembly straight to the main grounding busbar of the enclosure panel to dissipate static charge.
- Shield Wire Termination: Ground all digital signal shields at a single point on the enclosure entry plate, ensuring the exposed drain wires remain as short as possible to minimize industrial electromagnetic noise coupling.
- Conductor Specification: Connect all field terminal blocks using copper wiring rated for at least 90 deg C, choosing wire sizes between 22-14 AWG for solid conductors and 22-16 AWG for stranded cables.
- Airflow Clearance Boundaries: Maintain a minimum clear space of 50 mm (2 inches) on all sides of the controller housing to allow vertical convection currents to cool the internal electronic assemblies.