Description
Allen-Bradley 1785-L20C15 PLC-5 ControlNet Processor | 16K Memory
The Allen-Bradley 1785-L20C15 delivers robust control capabilities for industrial automation systems. This PLC-5 ControlNet processor from Rockwell Automation offers advanced networking and reliable performance.
Technical Specifications & Performance Data
- Brand: Allen-Bradley / Rockwell Automation
- Model: 1785-L20C15
- Processor Type: PLC-5/20C ControlNet
- User Memory: 16 Kilowords battery-backed RAM
- EEPROM Backup: Supports 1785-ME16, ME32, ME64, M100 modules
- I/O Capacity: 512 forcible I/O (any mix)
- Max Analog I/O: 512 forcible, 32000 non-forcible points
- Backplane Current: 2.7A @ 5V DC (3A maximum)
- Heat Dissipation: 54 BTU per hour
- Scan Time: 0.5ms average for ControlNet I/O
- Communication Ports: RS-232, DH+, ControlNet, Remote I/O
System Configuration & Capacity
- Maximum 77 I/O chassis total system capacity
- Supports up to 12 universal remote I/O chassis
- 0 extended local I/O chassis capability
- ControlNet supports multiple controllers on same network
- DH+ cable length: 3048m @ 57.6 kbps, 762m @ 230.4 kbps
- All devices on DH+ link must use same transmission rate
- Lithium battery backup for memory protection
- Front-panel status indicators for easy diagnostics
Packaging & Shipping Information
- Includes one 1785-L20C15 processor unit
- Professional protective packaging ensures safe delivery
- Global express shipping via FedEx, UPS, and DHL
- 12-month quality warranty against manufacturing defects
Frequently Asked Questions
- What communication protocols does this processor support?
The processor supports ControlNet, Data Highway Plus, Remote I/O, and RS-232 protocols. - Can I mix different ControlNet phases on the same network?
No, you cannot mix phase 1.5 with phase 1.0 or 1.25 devices on the same network. - What is the maximum I/O capacity of this processor?
It supports 512 forcible I/O points or 32000 non-forcible analog I/O points. - How does the battery backup system work?
The lithium battery maintains memory contents during power outages. - What are the available operating modes?
RUN, PROGRAM, and REMOTE modes with key-switch selection.
Alternative Module Comparisons
- For digital input applications, consider the 1794-IB16
- The 1785-L26B offers different processor capabilities
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