Product Summary
The Allen-Bradley 1785-L40E is a powerful PLC-5 controller for medium to large applications. It provides 48K words of user memory and supports up to 2048 I/O points. This module integrates EtherNet/IP, DH+, and serial ports for versatile connectivity. Engineers use it to manage complex automation processes reliably.
Expert Technical Evaluation & Performance Review
The 1785-L40E delivers exceptional scan performance for demanding control tasks. It achieves a remote I/O scan time of just 3 ms at 230.4 kbps. This speed ensures rapid data exchange across your distributed system.
The controller manages up to 61 I/O chassis links effectively. It supports a maximum of 16 I/O racks for extensive system expansion. This capacity allows you to scale operations without replacing the core processor.
You can configure I/O addressing in three distinct modes for flexibility. The 2-slot mode works with 8-point and pairs of 16-point modules. The half-slot mode handles any mix of 8, 16, and 32-point modules.
The 1785-L40E operates reliably in harsh industrial environments. It functions without de-rating from 0 to 60 degrees Celsius. The module withstands operational shock up to 30G and vibration at 1G.
Step-by-Step User & Installation Guide
First, install the 1785-L40E into a compatible 1771 series chassis. Use models like the 1771-A1B or 1771-A4B for proper mounting. Ensure the chassis backplane provides adequate power distribution.
Second, connect a compatible power supply such as the 1771-P4S or 1771-P6S. The controller draws a backplane current of 3.3A and dissipates 17.3W. Verify your power budget before installation to avoid overloads.
Third, wire the embedded communication ports for your network topology. Use the dedicated 15-pin EtherNet/IP port for TCP/IP connectivity. Connect the two DH+/Remote I/O ports to your Data Highway network.
Fourth, configure the serial port for RS-232-C, 422-A, or 423-A standards. This port enables connection to programming terminals or other controllers. Set the communication parameters to match your network devices.
Fifth, install optional backup memory devices like the 1785-ME64 or 1785-ME32. These modules provide EEPROM program backup for your application. The controller also accepts 1785-M100 lithium batteries for memory retention.
Logistics & Standard Packaging Details
- One (1) Allen-Bradley 1785-L40E PLC-5/40E Processor Module
- Pre-installed 1770-XYC battery module for memory backup
- Product documentation and installation guide
- Express delivery shipping is available via FedEx, UPS, and DHL
