1769-L33ER Allen-Bradley CompactLogix 5370 CPU Processors
Manufacturer: Allen Bradley
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Part Number: 1769-L33ER/A
Condition：New with Original Package
Product Type: Analog Input Modules
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Allen-Bradley 1769-L33ER CompactLogix 5370 L3 Controller
The Allen-Bradley 1769-L33ER, also cataloged as the 1769-L33ER CompactLogix 5370 L3 Controller, operates as a dedicated hardware component for machine and process control execution within EtherNet/IP deterministic networks. The module processes up to 32 simultaneous tasks and supports direct physical interfacing with 16 local expansion modules via the internal backplane chassis. Dual embedded Ethernet ports handle real-time communications using Device Level Ring (DLR) topologies to manage remote I/O loops and distributed instrumentation data.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-L33ER / A |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.31 kg (0.68 lb) |
| Dimensions | 105 mm depth (Shipping size: 8 x 8 x 5 in.) |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 560 mA @ 5 VDC backplane current draw |
| Module Type | CompactLogix 5370 L3 Controller |
| User Memory | 2 MB embedded |
| Non-volatile Storage | 1 GB SD card included (Expandable to 2 GB) |
| Communication Ports | 2 x Ethernet (DLR capable), 1 x USB |
| Max EtherNet/IP Nodes | 32 nodes |
| Expansion Capacity | Up to 16 local expansion modules |
| Continuous Tasks | 32 tasks (100 programs per task) |
| Power Dissipation | 4.5 W approximately |
| Isolation Voltage | 30 V continuous, basic insulation |
| Shock Tolerance | 20 g (DIN rail), 30 g (panel mount) |
| Vibration Tolerance | 5 g @ 10-500 Hz |
EtherNet/IP Deterministic Networks and Firmware Flash Compatibility
The hardware architecture uses the dual embedded Ethernet ports to establish deterministic control networks, securing precise transmission intervals for connected distributed nodes. System engineers maintain deterministic cycle execution by coordinating the controller processing speed with strict I/O density scaling profiles. To eliminate communications lag across the backplane bus, technicians verify the firmware flash compatibility between the host processor and the 16 local expansion modules prior to hot commissioning. The internal system logic routes data loops directly, thereby avoiding the communication bottlenecks common to non-synchronized fieldbus topologies.
Frequently Asked Questions
Q: Does the 1769-L33ER controller allow hot-swapping or removal of the module under power?
A: No. The backplane design lacks hot-swap capabilities. Technicians must completely de-energize the 1769-PA2, 1769-PA4, or 1769-PB4 power supply before inserting or extracting any module to prevent component damage.
Q: How does the hardware respond when a network cable breaks inside the primary EtherNet/IP loop?
A: The embedded dual ports immediately activate the Device Level Ring (DLR) protocol, converting the ring topology into a linear architecture within milliseconds to maintain uninterrupted control data execution.
Q: What actions are required if the application data exceeds the 2 MB user memory limit?
A: The 2 MB capacity is fixed for runtime application logic execution. While the included 1 GB SD card provides storage for non-volatile recipe data, firmware images, and user logs, larger runtime applications require upgrading to a higher-capacity ControlLogix or CompactLogix processor.
Field Installation Guidelines
Mount the controller module onto standard symmetric DIN rail or secure it directly to the enclosure backpanel using the designated panel mounting holes. Provide a minimum clearance layout of 50 mm on all sides of the hardware assembly to guarantee unhindered thermal convection currents. Slide adjacent local I/O modules along the chassis tracks until the tongue-and-groove side locks engage tightly, then push the integrated bus lever to link the internal communication pathways. Connect all Ethernet communication media using shielded category cables, terminating the shields directly at the main enclosure earth ground bus bar. Keep all signal and network wiring physically segregated from high-power AC lines inside the wire ducts to eliminate inductive electrical noise interference.