1785-L40C Allen-Bradley ControlNet Processor Module

Introducing the Allen-Bradley 1785-L40C ControlNet Processor Module

Key Technical Specifications and Features

• Brand & Part Number: Allen-Bradley 1785-L40C
• Processor & Memory: PLC-5/40C processor with 48 Kilowords maximum user memory (battery-backed SRAM)
• I/O Capacity: Supports 2048 total I/O (any mix) or 2048 inputs plus 2048 outputs in complementary setup
• Analog I/O: Handles up to 2048 analog I/O points for comprehensive process control
• Program Scan Time: 0.5ms per K-word for bit logic, 2ms per K-word typical scan time

Communication Ports and Network Capabilities

• The 1785-L40C includes a base-configured RJ45 ControlNet port with 5Mb per second transmission rate.
• Users can select network update times from 2 to 100ms for flexible ControlNet performance.
• It features an 8-pin mini-DIN connector for programming and a 3-pin default DH+ port.
• The 25-pin D-shell serial port supports selectable rates from 57.6K bit/s to 230.4K bit/s.
• I/O scan time per rack ranges from 10ms at 57.6K bit/s down to 3ms at 230K bit/s.

System Integration and Module Compatibility

• This ControlNet processor supports the 1785-L40C 1785-CHBM Hot Backup Cartridge for system redundancy.
• It works with 1771, 1794, 1746, and 1791 I/O modules in 8-point, 16-point, and 32-point configurations.
• The controller accommodates intelligent I/O modules for advanced automation applications.
• Maximum system configuration supports 61 total I/O chassis with 32 universal remote chassis per I/O link.
• EEPROM program backup is available using 1785-ME16, -ME32, -ME64, or -M100 memory modules.

Electrical and Environmental Specifications

• The 1785-L40C draws 3.3A of backplane current at 5V DC during normal operation.
• Maximum heat dissipation measures 59 BTU per hour when the controller is operational.
• It operates without derating in temperatures from 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit).
• The module withstands 5 to 95 percent noncondensing relative humidity during operation.
• Storage temperature range extends from -40 to 85 degrees Celsius (-40 to 185 degrees Fahrenheit).

Frequently Asked Questions (FAQ)

• What is the maximum I/O capacity of the 1785-L40C processor?
  The 1785-L40C supports up to 2048 total I/O points, configurable as any mix or 2048 in plus 2048 out complementary.
• Does this module support hot backup redundancy?
  Yes, it supports the 1785-CHBM ControlNet Hot Backup Cartridge for system redundancy applications.
• What communication ports are available on the 1785-L40C?
  It includes an RJ45 ControlNet port, 8-pin mini-DIN programming port, 3-pin DH+ port, and 25-pin D-shell serial port.
• What is the operating temperature range for this controller?
  It operates reliably from 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit) without derating.
• Which I/O modules work with the 1785-L40C processor?
  It works with 1771, 1794, 1746, and 1791 modules, including 8-point, 16-point, 32-point, and intelligent I/O modules.

Contact Information Inquiries: sales@nex-auto.com , +86 153 9242 9628

Partner: NexAuto Technology Limited