The Allen-Bradley 1785-L40C15 is a ControlNet PLC5 Programmable Logic Controller designed for demanding industrial automation environments. This controller supports dual ControlNet communication interfaces, providing advanced connectivity options. It is capable of handling up to 48K Words of user memory and supports a variety of I/O configurations. The 1785-L40C15 integrates seamlessly into Data Highway Plus (DH+), Remote I/O (RIO), and ControlNet networks, offering flexibility for distributed control systems. Additionally, the controller is compatible with several I/O modules, such as Bulletin 1771, 1794, and 1746 series.

Technical Specifications

• Controller Type: PLC-5/40C
• Maximum User Memory: 48 Kilowords
• Maximum I/O Capacity:
  • 2048 (Any mix of Input/Output)
  • 2048 input and 2048 output in complimentary mode
• Memory Modules: Expandable with 1785-ME32, 1785-ME64, 1785-M100
• Program Scan Time:
  • 0.5 ms per K word (bit logic)
  • 2 ms per K word (typical)
• Supported I/O Systems:
  • Bulletin 1771 I/O
  • 1794 I/O
  • 1746 I/O
  • 1791 I/O including 8-, 16-, 32-point, and intelligent modules
• Communication Ports:
  • Data Highway Plus (DH+)
  • Remote I/O (RIO)
  • Serial Communication (DF1 and ASCII protocols)
  • ControlNet (Two ports, secondary and tertiary interfaces)
• Backup Battery: 1770-XYC battery for memory retention during power loss
• Hot Backup Support: 1785-CBHM module for ControlNet Hot Backup
• I/O Scan Time:
  • 0.5 ms for ControlNet I/O
  • 10 ms for Universal Remote I/O at 57.6 kbits/s
  • 3 ms for Universal Remote I/O at 230.4 Mbps
• Processor Type: PLC-5/40C
• Chassis Compatibility:
  • 1771-A1B, -A2B, -A3B, -A3B1, -A4B chassis (left-most slot)
• RS-232-C/422-A/423-A Ports: 1 port
• Weight: 3.04 lbs
• Operating Voltage: 5VDC, 3A
• Max Analog I/O:
  • Forcible: 2048
  • Nonforcible: 48000
• Processor Redundancy: Supported with ControlNet Hot Backup