Allen-Bradley 1769-L34ER CompactLogix 5370 Processor CPU Controller
Manufacturer: Allen Bradley
-
Part Number: 1769-L34ER
Condition：New with Original Package
Product Type: CPU Processors
-
Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Allen-Bradley 1769-L34ER CompactLogix 5370 Processor
Configured for high-speed industrial control in CompactLogix 5370 L3 automation architectures, the Allen-Bradley 1769-L34ER (1769-L34ER CompactLogix Processor) provides direct physical/electrical execution. The hardware assembly processes control logic, coordinates motion axes over networks, and manages backplane communication to local I/O expansions. Dual localized network ports manage device-level rings to ensure operational continuation during cable fractures without interrupting active CPU cycles.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-L34ER |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 310 g |
| Dimensions | Standard CompactLogix 5370 form factor |
| Operating Temp | 0 to +60 deg C |
| Storage Temp | -40 to +85 deg C |
| Power Consumption | 1.0 A @ 5 VDC backplane current draw |
| User Memory | 2 MB volatile memory |
| I/O Capacity | Up to 16 local 1769 I/O modules |
| Network Ports | 2 x 10/100 Mbps Ethernet ports |
| Local Interface | 1 x USB 2.0 interface |
| Storage Media | Removable SD card slot (1 GB capacity included) |
| Motion Scaling | Up to 16 electronic axes over EtherNet/IP |
| Protocols | EtherNet/IP, CIP Motion, CIP Sync, Modbus TCP socket |
| Certifications | CE, UL, CSA, IECEx, ATEX |
Deterministic Network Routing and I/O Density Scaling
The control engine utilizes the EtherNet/IP deterministic network infrastructure to maintain time-synchronization via CIP Sync across multi-axis motion nodes. This embedded communication configuration handles up to 16 local 1769 I/O modules directly over the passive backplane bus without requiring dedicated external motion controllers. Software configurations executed inside Studio 5000 Logix Designer establish fixed data packet rates, preventing packet collisions and maintaining sub-millisecond execution velocity across the integrated network interface.
Frequently Asked Questions
Q: What is the maximum number of local expansion modules that the 1769-L34ER backplane bus can support?
A: The internal bus structure allows the connection of up to 16 local 1769 I/O modules, provided the cumulative current draw does not exceed the 1.0 A @ 5 VDC power distribution limit.
Q: How does the dual-port Ethernet interface behave during a hardware link failure?
A: The processor natively runs Device Level Ring (DLR) topology, which automatically reroutes network data packets within milliseconds if a single point of network separation occurs along the physical cable run.
Q: Is firmware flash compatibility maintained across different versions of programming software?
A: Yes, the onboard non-volatile memory and SD card interfaces facilitate firmware updates via the integrated USB 2.0 port to match the specific major revision required by the Studio 5000 Logix Designer project.
Field Installation Guidelines
- Backplane Current Calculation: Verify the total current requirements of all connected 1769 modules before startup to prevent overcurrent trips on the main 1.0 A @ 5 VDC backplane line.
- SD Card Retention: Insert the non-volatile SD storage medium firmly into the front panel slot and verify the physical lock latch is engaged before loading operating system runtime parameters.
- Enclosure Cooling Gaps: Mount the processor chassis horizontally on a standard DIN rail, maintaining a minimum 50 mm clearance zone on all sides to allow optimal ambient airflow and prevent thermal stress inside the panel enclosure.