Allen-Bradley 1769-L33ER CompactLogix 5370 L3 Controller
The Allen-Bradley 1769-L33ER / A, also cataloged as the 1769-L33ER Programmable Automation Controller, operates as a dedicated hardware component for industrial process logic execution and high-speed data transmission within EtherNet/IP networks. The controller manages up to 2 MB of user memory, executing up to 32 concurrent controller tasks across dual Ethernet/IP ports with embedded switch capability for Device Level Ring topologies.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-L33ER |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.60 kg (1.31 lbs) |
| Dimensions | Standard CompactLogix 1769 form factor |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | Requires external 1769 power supply (24 VDC bus) |
| User Memory | 2 MB |
| EtherNet/IP Nodes | Up to 32 nodes |
| Local Expansion Capacity | Up to 16 local modules across maximum 3 expansion banks |
| Communication Ports | 2 Ethernet 10/100 Mbps ports (DLR capable), 1 USB Type-B port |
| Non-Volatile Memory | 1 GB SD card included (1784-SD1), supports up to 2 GB |
| Execution Structure | 32 tasks maximum, 100 programs per task |
| Vibration / Shock | 10 to 500 Hz at 5 g; Shock: 20 g (DIN rail), 30 g (panel mount) |
Industrial Control & Drive Integration
The 1769-L33ER processor relies on high backplane bus communication velocity to manage real-time I/O data exchanges across connected local modules. Support for EtherNet/IP deterministic networks enables seamless integration with distributed drives, remote I/O blocks, and third-party Modbus TCP devices via open socket capabilities. Continuous firmware flash compatibility routines safeguard system execution parameters during online routine updates and scheduled scan cycles.
Frequently Asked Questions
Q: Does the 1769-L33ER controller require a lithium battery to maintain user memory during power-off states?
A: No, the 1769-L33ER incorporates internal energy storage circuitry to transfer active memory content to non-volatile flash memory during system shutdown, eliminating the maintenance requirements of traditional lithium batteries.
Q: Can 1769 expansion modules be inserted or removed from the controller backplane while power is applied?
A: No, the CompactLogix 1769 backplane architecture does not support Removal and Insertion Under Power (RIUP). Removing or inserting modules with power applied will trigger backplane fault conditions and can cause physical damage to controller interface electronics.
Field Installation Guidelines
Mount the 1769-L33ER controller on a grounded 35 mm DIN rail or fasten it securely to an enclosure backplate using mounting screws inside an IP54-rated industrial cabinet. Verify that a 1769 power supply module is installed within the valid distance rating (maximum 4 slots from the CPU module) to prevent backplane voltage drops. Secure a 1769-ECR end cap on the rightmost slot of the local chassis to terminate the backplane bus. Route all communication cables in separate raceways away from motor leads and power conductors, grounding shielded Ethernet runs to a central grounding bar.
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| Shipping Port | ShangHai, Xiamen |
| Warranty | 12 Months |
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