CompactLogix 5370 L3 Controller
Allen-Bradley 1769-L33ER Controller
The 1769-L33ER is a CompactLogix 5370 L3 controller with 2 MB user memory, two integrated EtherNet/IP ports with Device Level Ring capability, support for up to 16 local 1769 I/O modules and up to 32 EtherNet/IP nodes.
For a Faster RFQ
- Send the complete catalog number and suffix.
- Confirm Series, firmware and project version.
- State required condition, quantity and destination.
- Attach controller and nameplate photos for replacements.
1769-L33ER Key Specifications
Manufacturer data for model selection and installed-system checks.
| Manufacturer / Brand | Allen-Bradley / Rockwell Automation |
|---|---|
| Catalog number | 1769-L33ER |
| Controller family | CompactLogix 5370 L3 |
| Lifecycle status | Active Mature. No manufacturer discontinuation date is announced for 1769-L33ER at the time this page was prepared. |
| User memory | 2 MB |
| Integrated communications | Two EtherNet/IP ports with DLR capability; USB service/configuration connection |
| EtherNet/IP nodes | Up to 32 |
| Local 1769 expansion | Up to 16 modules across two local banks |
| Nonvolatile memory | Controller ships with a 1 GB industrial SD card and supports up to 2 GB |
| Backplane current | 500 mA at 5 V DC; 225 mA at 24 V DC |
| Maximum power dissipation | 4.5 W |
| Approximate controller size | 55 mm W × 118 mm H × 105 mm D |
| Operating temperature | 0…60 °C (32…140 °F) |
Lifecycle, Discontinuation and Replacement
Separate current lifecycle status from future migration planning.
Current 1769-L33ER Status
Active Mature is the current Rockwell Automation lifecycle status. This means the controller is still supported as a mature product; it is not currently listed as discontinued.
Availability can vary by region and manufacturing schedule. Confirm the product label, Series and firmware at the quotation stage.
Migration Path: 5069-L320ER
Rockwell Automation's 5370-to-5380 mapping identifies 5069-L320ER as the CompactLogix 5380 equivalent for 1769-L33ER.
This is an engineering migration, not a drop-in replacement.
- 1769 Compact I/O and 5069 Compact 5000 I/O use different hardware platforms.
- Review power, end-cap, wiring, cabinet space and network topology.
- Convert and validate the Studio 5000 project, firmware and module profiles.
- Recommission safety, motion, produced/consumed tags and communications where used.
Typical Applications
Common uses for a mid-range CompactLogix controller with dual Ethernet connectivity.
1769 Family Selection Guide
Popular controllers, I/O modules and system accessories that buyers commonly compare with 1769-L33ER.
1. Core CPU Controllers
1769-L33ER: 2 MB memory, 16 local expansion modules and 32 EtherNet/IP nodes. A versatile mid-range choice for general machine automation.
1769-L30ER: 1 MB memory, eight local expansion modules and 16 EtherNet/IP nodes for smaller standard control cabinets.
1769-L33ERM / 1769-L36ERM: Motion-capable models for coordinated servo and packaging applications. Confirm required CIP Motion axes and kinematics.
1769-L24ER-QBFC1B / 1769-L18ER-BB1B: Packaged controllers with embedded I/O for compact, space-limited machines.
1769-L32E / 1769-L35E: Discontinued legacy controllers still requested for installed-base maintenance. Verify Series, firmware, serial communication and Ethernet requirements before replacement.
2. High-Use Digital I/O
1769-IQ16: 16-point 24 V DC input module.
1769-OB16: 16-point 24 V DC transistor output module.
1769-OW16: 16-point relay output module for isolated or mixed-load applications.
1769-IQ32 / 1769-OB32: High-density 32-point input and output choices for channel-intensive panels.
Check sink/source wiring, voltage range, removable terminal block and module distance rating before ordering.
3. Analog and Temperature Modules
1769-IF4I / 1769-IF8: Isolated four-channel or standard eight-channel analog input selections for process signals.
1769-OF4 / 1769-OF8C: Analog output selections commonly used with variable-frequency drives and proportional control devices.
1769-IR6 / 1769-IT6: Six-channel RTD and thermocouple temperature-input modules.
Confirm input type, signal range, isolation, channel count and sensor wiring; similar model names are not interchangeable.
4. Power Supplies and End Caps
1769-PA4 / 1769-PB4: 1769 system AC and DC power-supply options. Select by field power and total module current requirement.
1769-ECR / 1769-ECL: Right and left end caps used to terminate a 1769 bus bank.
A missing or incorrect end cap can prevent normal system operation. For a complete assembly RFQ, include the controller, power supply, I/O order, expansion cables and end-cap positions.
What Buyers Should Confirm Before Ordering
These details reduce compatibility errors and speed up quotation review.
Confirm 1769-L33ER versus L33ERM, L33ERK or another suffix.
Send the controller label and the Studio 5000 project version.
List all 1769 modules, power supplies, banks, cables and end caps.
State DLR use, IP-node count, produced/consumed tags and connected devices.
Specify factory new, new surplus or refurbished and the required test documentation.
Provide quantity, destination country and target delivery date.
1769-L33ER FAQ
Five common questions from maintenance and automation buyers.
1. Is the Allen-Bradley 1769-L33ER discontinued?
No. Rockwell Automation currently lists 1769-L33ER as Active Mature. No discontinuation date is announced for this exact catalog number at the time this page was prepared. Lifecycle status should still be reconfirmed when an order is placed.
2. Does 1769-L33ER support 16 or 32 EtherNet/IP nodes?
It supports up to 32 EtherNet/IP nodes. The number 16 refers to the maximum number of local 1769 expansion modules, not Ethernet nodes.
3. Is 1769-L33ER a direct replacement for 1769-L32E or 1769-L35E?
Not automatically. Review firmware, Studio 5000 project compatibility, serial-port use, Ethernet topology, local I/O banks, power supplies and available cabinet space. A tested migration plan is required.
4. Can 5069-L320ER completely replace 1769-L33ER?
5069-L320ER is the mapped CompactLogix 5380 equivalent, but it is not a drop-in hardware replacement. The I/O platform, power architecture, wiring accessories, dimensions and project configuration must be reviewed and changed as required.
5. What information is needed for an accurate quotation?
Send the complete catalog number, Series, firmware, quantity, required condition, destination and delivery target. For replacement projects, also send clear nameplate photos and the existing I/O/power/end-cap configuration.
Recommended 1769 Products
Continue comparing commonly requested controllers, I/O modules and power components on PLC Leader.
Need 1769-L33ER Availability or a Compatibility Check?
Send your part number, Series, firmware, quantity, condition and destination for a model-specific review.
