Allen-Bradley 1769-L33ERM CompactLogix L3 Controller | Replacement, Equivalent & Selection Guide
The Allen-Bradley 1769-L33ERM is a mid-range CompactLogix 5370 L3 programmable logic controller (PLC) featuring an integrated EtherNet/IP port. Designed for demanding discrete, process, and motion control applications, it delivers high-speed processing, scalable I/O expansion, and seamless Studio 5000 Logix Designer integration. This page provides full technical specifications, compatible replacement models, application guidance, and a structured selection guide to help engineers and procurement teams make confident sourcing decisions.
Technical Specifications
- Catalog Number: 1769-L33ERM
- Series: CompactLogix 5370 L3
- Processor Memory: 2 MB user memory
- Communication: Dual-port EtherNet/IP (embedded switch)
- I/O Capacity: Up to 16 CompactLogix expansion modules
- Motion Axes: Up to 16 axes (CIP Motion)
- USB Port: USB Type-B (programming/configuration)
- Power Supply: 1769-PA2 / 1769-PB2 (sold separately)
- Operating Temperature: 0 °C to 60 °C (32 °F to 140 °F)
- Storage Temperature: −40 °C to 85 °C
- Relative Humidity: 5% to 95% non-condensing
- Certifications: UL, CE, RCM, cULus
- Programming Software: Studio 5000 Logix Designer v21+
- Dimensions (H × W × D): 118 mm × 35 mm × 87 mm (approx.)
- Weight: Approx. 0.35 kg
Compatible Replacement & Equivalent Models
The following models are commonly evaluated as direct or functional replacements for the 1769-L33ERM. Always verify firmware compatibility and I/O configuration before substitution.
- 1769-L30ERM — CompactLogix L3, 1 MB memory, same EtherNet/IP dual-port; suitable for smaller applications
- 1769-L36ERM — CompactLogix L3, 4 MB memory, higher capacity upgrade path
- 1769-L37ERM — CompactLogix L3, 8 MB memory, maximum L3 series capacity
- 1769-L33ER — Single EtherNet/IP port variant; functionally similar, reduced network redundancy
- 1769-L33ERMS — Safety-rated variant with SIL 2 / PLd capability; drop-in for safety-critical upgrades
- 5069-L306ERM — CompactLogix 5380 next-generation equivalent; higher throughput, same Studio 5000 environment
Note: Third-party or aftermarket equivalents may exist. Konmask.com supplies only genuine Rockwell Automation / Allen-Bradley parts.
Why Choose the Original Model
- Proven field reliability — Widely deployed across automotive, food & beverage, oil & gas, and water treatment industries
- Native Studio 5000 integration — Full tag-based programming, online editing, and diagnostics without third-party middleware
- Dual EtherNet/IP switch — Enables linear and ring (DLR) topologies without external switches, reducing BOM cost
- CIP Motion support — Coordinates up to 16 servo axes natively over EtherNet/IP
- Long-term support — Active product lifecycle with firmware updates and Rockwell TechConnect support availability
- Regulatory compliance — UL, CE, and cULus listed for global deployment
Typical Applications
- Discrete manufacturing: assembly lines, conveyor control, robotic cell integration
- Process control: batch management, PID loops, valve sequencing
- Motion control: multi-axis servo coordination, packaging machinery
- Building automation: HVAC, access control, energy management
- Water & wastewater: pump station control, SCADA integration
- Oil & gas: wellhead automation, pipeline monitoring
System Compatibility
- I/O Modules: All 1769 CompactLogix I/O series (digital, analog, specialty)
- Power Supplies: 1769-PA2 (120/240 VAC), 1769-PB2 (24 VDC)
- HMI: PanelView Plus 6/7, FactoryTalk View SE/ME
- Drives: PowerFlex 525/755 via EtherNet/IP CIP Motion
- Networks: EtherNet/IP (primary), DeviceNet / ControlNet via bridge modules
- SCADA: FactoryTalk Historian, Ignition, Wonderware via OPC-UA/DA
- Programming: Studio 5000 Logix Designer v21 and above
Selection Guide
Use the table below to identify the right CompactLogix L3 model for your application:
| Requirement | Recommended Model |
|---|---|
| Standard application, 2 MB memory, dual EtherNet/IP | 1769-L33ERM ✓ |
| Smaller footprint, 1 MB memory | 1769-L30ERM |
| Larger program, 4 MB memory | 1769-L36ERM |
| Maximum L3 capacity, 8 MB memory | 1769-L37ERM |
| Safety-rated (SIL 2 / PLd) required | 1769-L33ERMS |
| Next-gen performance, future-proof platform | 5069-L306ERM (CompactLogix 5380) |
Quality Assurance & Sourcing
- Genuine parts only — All units sourced through authorized or verified distribution channels
- Pre-shipment inspection — Each unit inspected for physical integrity, label authenticity, and firmware version
- Traceability — Lot and serial number documentation available upon request
- Warranty — 12-month replacement warranty against manufacturing defects
- Anti-counterfeit policy — Konmask.com maintains a zero-tolerance policy on counterfeit components
How to Order
- Confirm catalog number: 1769-L33ERM (specify series revision if required)
- Indicate required quantity and delivery timeline
- Submit inquiry via support@konmask.com or add directly to cart
- Receive quotation with lead time, shipping options, and invoice within 1 business day
- Payment accepted: T/T bank transfer, PayPal, and major credit cards
Replacement & Compatibility FAQ
Q: Can the 1769-L33ERM replace a 1769-L32E?
A: Yes, with firmware and program migration. The L33ERM offers more memory and dual EtherNet/IP vs. the single-port L32E. A Studio 5000 project conversion is required.
Q: Is the 1769-L33ERM compatible with RSLogix 5000?
A: RSLogix 5000 v20 and earlier have limited support. Studio 5000 Logix Designer v21+ is strongly recommended for full feature access.
Q: Can I use third-party I/O with this controller?
A: Yes, via EtherNet/IP adapter-compatible third-party I/O. Native 1769 I/O modules are recommended for optimal performance and diagnostics.
Q: What is the difference between 1769-L33ERM and 1769-L33ERMS?
A: The ERMS variant adds integrated safety functionality (SIL 2 / PLd) for use with GuardLogix safety I/O. Hardware form factor is identical.
Q: Does Konmask.com ship internationally?
A: Yes. We ship worldwide with DHL, FedEx, and UPS express options. Export compliance documentation provided for controlled destinations.
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