Allen‑Bradley 1769‑L35CR CompactLogix ControlNet PLC Controller

The Allen‑Bradley 1769‑L35CR is a CompactLogix series programmable logic controller equipped with built‑in ControlNet redundant media port. It belongs to Rockwell Logix control platform and adopts RSLogix5000 programming software to realize sequential logic, motion and process control for factory automation.

This DIN‑rail mounted controller has 1.5MB user memory and supports up to 30 local I/O modules and 8 scheduled tasks. Original production has been discontinued. It is widely supplied as aftermarket spare parts for production line reconstruction and old automation system maintenance.

Main Specifications

1. Brand: Allen‑Bradley / Rockwell Automation; Model:1769‑L35CR; Type:CompactLogix PLC Controller
2. User Memory:1.5MB, maximum 30 local 1769 I/O modules, 8 controller tasks
3. Communication Ports:Integrated ControlNet redundant port and RS232 serial communication interface
4. Programming Software:RSLogix 5000, compatible with 1769 series local expansion I/O modules
5. Installation:Standard DIN rail mounting, panel mounting optional, 24VDC system power supply
6. Operating Temperature:0℃ ~ +60℃, industrial compact modular design
7. Supply Status:Original production discontinued, available as tested surplus or refurbished spare parts

Core Functions

1. Execute ladder logic, structured text and function block programs for automatic equipment control.
2. Control local expansion I/O modules and collect digital & analog field sensor signals.
3. Realize high‑reliability intercontroller interconnection and distributed I/O communication via ControlNet redundant network.
4. Serial RS232 port connects HMI, barcode readers and other peripheral field devices.
5. Store production parameters, alarm logs and support battery‑backed memory for data retention.
6. Work as the core control unit of Rockwell CompactLogix modular automation control system.

Application Scenarios

1. Assembly lines, packaging machinery, material handling and continuous process factory automation.
2. Spare controller replacement and daily maintenance of existing CompactLogix 1769 automation racks.
3. Technical renovation and stability improvement of old ControlNet‑based distributed control systems.
4. On‑site troubleshooting and replacement of failed PLC controllers on running production machines.
5. Spare‑parts stocking for system integrators and industrial automation maintenance contractors.
6. Global aftermarket spare supply for technicians maintaining obsolete Rockwell CompactLogix hardware.

FAQ

1. Q:What network does 1769‑L35CR adopt?
   A:It has built‑in ControlNet redundant communication port plus RS232 serial port, no Ethernet port.
2. Q:How many local I/O modules can it support?
   A:It can be expanded with up to 30 pieces of 1769 series local I/O modules.

3. Q:Is this CompactLogix controller still in original production?
   A:Rockwell has stopped manufacturing this model, only tested surplus and refurbished spare units are available.