Allen‑Bradley 1785-L40C15 PLC-5 Processor Module

The Allen‑Bradley 1785-L40C15 is a PLC-5 programmable controller processor integrated with ControlNet communication interface. It executes ladder logic programs, processes real-time I/O signals, and manages all modules on the PLC-5 chassis to implement stable automatic control for medium and large industrial production processes.

This processor owns 40K words program memory, supports remote I/O, peer communication and redundant hot backup configuration. It can interconnect with HMI, inverters and other controllers via ControlNet, widely used as replacement spare parts for maintenance and upgrading of legacy PLC-5 automation systems.

Main Specifications

• Brand: Allen‑Bradley (Rockwell Automation)
• Model: 1785-L40C15
• Product Type: PLC-5 ControlNet Processor Module
• Program Memory: 40K logic words
• Onboard Interface: Built-in ControlNet communication port
• Supported Networks: ControlNet, Remote I/O, Data Highway Plus
• Compatible with hot backup memory cartridge 1785-CHBM
• Operating Temperature Range: 0°C ~ +60°C
• Backplane Power Consumption: 1.1A @ 5VDC
• Installation: Single-slot PLC-5 chassis mounting

Core Functions

• Run user ladder logic to realize continuous process and sequence automatic control
• Complete real-time data exchange with local and remote I/O modules through backplane bus
• Build deterministic ControlNet network connection with HMIs, drives and other PLC stations
• Support redundant hot backup system when matched with 1785-BCM and 1785-CHBM
• Collect equipment fault information, generate alarms and upload data to upper monitoring system
• Realize peer-to-peer data communication between multiple PLC-5 control processors
• Store control programs and production parameters, support program upload and download
• LED status indicators facilitate daily inspection and rapid on-site fault diagnosis
• Industrial anti-interference design adapts to long-term continuous operation in workshops
• Single-slot plug-in structure enables quick disassembly and emergency replacement

Application Scenarios

• Petrochemical continuous production process control systems
• Automobile manufacturing assembly and welding production lines
• Power plant auxiliary equipment sequential control and monitoring racks
• Oil & gas compressor station and pipeline monitoring automation platforms
• Water treatment plant large-scale distributed pump and valve control systems
• Pulp & paper continuous production line process control cabinets
• Metallurgical furnace and rolling mill equipment automatic control units
• Port bulk material conveying and loading control systems
• Renovation, expansion and spare parts support of legacy PLC-5 control networks
• PLC-5 controller spare parts maintenance and emergency replacement projects