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3. Key Technical Specifications
| Parameter | Value |
|---|---|
| Catalog Number | 1769-L30ERM |
| Controller Family | CompactLogix 5370 L3 |
| User Memory | 1 MB |
| Nonvolatile Memory | 1784-SD1 (1 GB) SD card shipped; supports 1784-SD2 (2 GB) |
| Local Expansion Modules, Max | 8 |
| Local Expansion I/O Points, Max | 256 |
| EtherNet/IP Nodes, Max | 16 |
| Integrated Motion Axes (CIP) | Up to 4 position-loop axes |
| Communication Ports | 2 × EtherNet/IP (embedded switch, DLR capable); 1 × USB |
| EtherNet/IP Connections | 256 EtherNet/IP; 120 TCP |
| Controller Tasks | 32 |
| Programs per Task | 100 |
| Current Draw @ 5 V DC | 500 mA |
| Current Draw @ 24 V DC | 225 mA |
| Power Dissipation, Max | 4.5 W |
| Power Supply Distance Rating | 4 modules |
| Operating Temperature | 0…60 °C (32…140 °F) |
| Storage Temperature | –40…85 °C (–40…185 °F) |
| Relative Humidity | 5…95 % non-condensing |
| Mounting | DIN rail or panel |
| Battery | None (built-in energy storage) |
| Programming Software | Studio 5000 Logix Designer / RSLogix 5000 |
4. Product Introduction
The Allen-Bradley 1769-L30ERM is a CompactLogix 5370 L3 controller with 1 MB of user memory and dual EtherNet/IP ports that support Device Level Ring (DLR). It provides integrated CIP motion for up to four position-loop axes and connects to a maximum of eight local 1769 Compact I/O modules.
The controller ships with a 1 GB SD card for nonvolatile storage and includes an embedded switch for linear or ring network topologies. It is used for small-to-medium machine control applications that require coordinated motion, distributed I/O over EtherNet/IP, and compact panel footprint without the need for a separate motion controller.
1769-L30ERM
1769-L30ERM
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No power / status LEDs dark | Power supply or wiring issue | ❌ Low | Measure 24 V DC supply and chassis power | Verify external power supply first |
| Solid red OK LED | Major fault | ✅ High | Connect Studio 5000 and read major/minor fault log | Clear fault, check I/O configuration and program |
| Cannot go online via Ethernet | IP address conflict or cable problem | ✅ High | Ping controller IP; verify dual-port link lights | Confirm IP settings and network cable |
| Motion axes not responding | CIP motion configuration or drive issue | ✅ High | Check axis configuration and drive status in Logix | Verify motion group and drive firmware compatibility |
| SD card not recognized | Card missing, corrupted, or wrong type | ✅ Medium | Reseat industrial SD card; format if needed | Use only Rockwell 1784-SD1/SD2 cards |
| Module expansion faults | Exceeded 8-module or distance rating | ✅ Medium | Count local modules and distance from power supply | Stay within 8 modules and 4-module distance rating |
If the controller still will not run after these checks, capture the exact fault codes, firmware revision, and network status, then contact technical support with photos of the faceplate and wiring.
6. Frequently Asked Questions (FAQ)
Q: What is the difference between the 1769-L30ER and 1769-L30ERM?
A: The L30ERM adds integrated CIP motion support for up to four axes. The L30ER does not support integrated motion.
Q: How many local 1769 I/O modules can I connect?
A: A maximum of eight local expansion modules, with a power-supply distance rating of four modules.
Q: Does this controller require a battery?
A: No. It uses built-in energy storage to retain the program during power loss. An SD card provides nonvolatile backup.
Q: Can I use this controller for Device Level Ring (DLR)?
A: Yes. The dual EtherNet/IP ports include an embedded switch that supports DLR, linear, and star topologies.
Q: What SD card ships with the controller?
A: A 1784-SD1 (1 GB) industrial SD card. A 1784-SD2 (2 GB) card can be used as a higher-capacity replacement.
Q: Is the 1769-L30ERM still in active production?
A: Yes. It remains a current CompactLogix 5370 L3 controller. New original and new-surplus units are available.
Q: Can I expand the user memory beyond 1 MB?
A: No. Memory is fixed at 1 MB. If more memory is required, select a higher-capacity model such as the 1769-L33ERM or 1769-L36ERM.
