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Frequently inquire Together
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InquiryAllen-Bradley 1769-L33ERK CompactLogix 2 MB Controller
The Allen-Bradley 1769-L33ERK, also cataloged as the 1769-L33ERK CompactLogix controller, serves as a modular CPU unit within the CompactLogix 5370 L3 family, designed for deterministic control execution and Ethernet/IP communication.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-L33ERK |
| Brand | Allen-Bradley (Rockwell Automation) |
| Origin | USA |
| Weight | 1.2kg |
| Dimensions | Housing width 35 mm (approx.) |
| Operating Temp | Not specified |
| Power Consumption | Not specified |
| Device Type | CompactLogix Controller |
| Product Family | CompactLogix 5370 L3 |
| User Memory | 2 MB |
| I/O Expansion | Up to 16 × 1769 I/O modules |
| Ethernet Nodes | 32 maximum |
| Communication Ports | Dual Ethernet (DLR), USB |
| Storage | 1 GB SD card included, supports up to 2 GB |
| Special Feature | Conformal coating (suffix K) for chemical/moisture resistance |
Profinet / EtherNet/IP Deterministic Networks
The 1769-L33ERK integrates dual Ethernet ports supporting Device Level Ring (DLR) topology, ensuring deterministic communication and fault-tolerant networking. Backplane bus communication velocity maintains predictable scan cycles across up to 16 expansion modules. Firmware flash compatibility allows seamless upgrades, while I/O density scaling supports modular expansion without compromising timing integrity.
Frequently Asked Questions
Q: How many Ethernet nodes can the 1769-L33ERK support? A: The controller supports up to 32 Ethernet nodes.
Q: What is the purpose of the “K” suffix in the part number? A: The “K” suffix designates conformal coating, providing enhanced resistance against chemical exposure and moisture.
Q: What storage options are available? A: The controller includes a 1 GB SD card and supports expansion up to 2 GB.
Field Installation Guidelines
- Mount the controller securely on DIN rail or panel with proper retention.
- Ensure dual Ethernet ports are configured for DLR topology to maintain redundancy.
- Route USB and Ethernet cabling separately from high-voltage conductors.
- Verify shielding and grounding of I/O modules to minimize interference.
- Confirm SD card installation and firmware compatibility before commissioning.
- Inspect conformal coating integrity when used in chemically aggressive environments.
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