Overview
The Allen-Bradley 1769-L35E Series B is a CompactLogix Ethernet processor designed for modular industrial control systems. With 1.5MB of user memory and built-in EtherNet/IP communication, this controller delivers networked automation capabilities in a space-efficient package. The 1769-L35E supports up to 30 I/O modules distributed across three I/O banks, making it ideal for scalable applications ranging from small stand-alone systems to larger distributed networks.
Key Features
- 1.5MB user memory for program and data storage
- Supports up to 30 local I/O modules across three I/O banks
- Built-in EtherNet/IP and RS-232 serial communication ports
- Single RPI (Requested Packet Interval) configuration for all local modules
- Up to 8 concurrent controller tasks
- Optional 64/128MB CompactFlash memory expansion (1784-CF64/128)
- Compact, modular design suitable for panel and field applications
Technical Specifications
- Memory Capacity: 1.5MB user memory; optional 64 or 128MB CompactFlash
- I/O Capacity: Up to 30 local I/O modules; 3 I/O banks maximum
- Communication Ports: One Ethernet port (EtherNet/IP), one RS-232 serial (DF1/ASCII)
- Communication Options: EtherNet/IP, ControlNet, DeviceNet
- Concurrent Tasks: 8 maximum controller tasks
- Input Current: 660mA @ 5VDC, 90mA @ 24VDC
- Power Dissipation: 5.5 watts
- Isolation Voltage: 30V continuous
- Compatible Battery: Allen-Bradley 1769-BA (lithium)
- Dimensions: Refer to manufacturer datasheet for module dimensions
- Weight: 0.71 lbs
- Series: CompactLogix 5335E
- Certifications: UL Listed (File E65584); ODVA EtherNet/IP Conformance
Typical Applications
The 1769-L35E is widely deployed in:
- Distributed machine control and motion coordination
- Process automation with Ethernet connectivity
- Equipment integration and inter-device communication
- Small-to-medium production systems requiring networked I/O
- Retrofit and expansion of existing CompactLogix platforms
Compatibility & Replacements
Compatible With
- CompactLogix 1769 modular I/O modules (1769-IB, 1769-OB, analog, specialty)
- 1769-SDN DeviceNet scanner modules
- 1784-CF64 and 1784-CF128 CompactFlash memory cards
- 1769-BA battery backup unit
- Studio 5000 Logix Designer software (v30 and earlier supported firmware)
- EtherNet/IP networks and ODVA-compliant devices
- ControlNet and DeviceNet scanner modules
Replaces / Drop-In Replacement For
The 1769-L35E Series B is the successor to Series A. Both revisions share the same part number and are generally interchangeable for existing 1769-L35E installations. Verify firmware compatibility with your application before substitution.
Works With
- Programming Software: Studio 5000 Logix Designer (Rockwell Automation)
- Communication Protocols: EtherNet/IP, ControlNet, DeviceNet, DF1, ASCII, DH-485, Modbus RTU (via logic)
- CompactLogix Ecosystem: All 1769-series modular controllers and I/O
- Network Standards: ODVA EtherNet/IP specification compliance
