Description 

The Allen-Bradley 1785-L40C is a ControlNet processor module from the PLC 5 series. It features 48K of battery-backed SRAM. The module has an I/O capacity of 2048 total I/O points. or 2048 inputs and 2048 outputs in a complementary arrangement. It draws 3.3 Amps from the backplane at 5 Volts DC during operation.

The 1785-L40C processor module is a ControlNet processor module that has been designed and manufactured by Allen-Bradley. It is available through the PLC 5 series of control system components. The 1785-L40C ControlNet processor module has 48K of SRAM that is battery-backed. Its I/O capacity is 2048 total I/O or 2048 inputs and 2048 outputs arranged in a complementary setup. 

Technical Specifications 

Information About 1785-L40C

The Allen-Bradley 1785-L40C PLC-5/40C is a controller with ControlNet network capability. featuring a 48-KB word SRAM processor. This module is installed in the I/O slot of the 1771 I/O chassis and is used to control field device inputs and outputs. It offers a maximum user memory of 48KB words and an I/O capacity of 2048 (2048 inputs and 2048 outputs complementary). The module has a maximum program scan time of 0.5ms per K-word for bit logic and a typical scan time of 2ms per K-word. It draws 3.3A from the backplane at 5V DC and dissipates a maximum of 59 BTU/hour.

The 1785-L40C supports the 1785-CHBM ControlNet Hot Backup Cartridge and is compatible with 1771. 1794. 1746. and 1791 I/O modules. including 8-point. 16-point. 32-point. and intelligent I/O modules. It features an RJ45 ControlNet Network Access Port with an I/O transmission rate of 5Mbps and a user-selectable network update time between 2-100ms. along with a co-processor port.

Additional interfaces include an 8-pin mini-DIN programming connector. a 3-pin DH+ port. and a 25-pin D-shell serial port with transmission rates from 57.6Kbps to 230.4Kbps and a scan port time from 10ms per rack at 57.6Kbps to 3ms per rack at 230Kbps. The controller operates at temperatures between 0-60°C (32-140°F) with 5-95% non-condensing relative humidity and can be stored at -40-85°C (-40-185°F). It withstands 30G operational shock. 1G vibration at 10-500Hz. and has an open-style enclosure. Weighing 1.42kg (3lbs). the 1785-L40C is UL. CE. CSA. and C-TICK certified.

Manufacturer information

Allen-Bradley. a brand of Rockwell Automation. specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs). motion control systems. safety devices. motor control equipment. automation software. and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.