Product Overview

The 1785-L40C15 is a Programmable Logic Controller from the PLC5 series by Allen-Bradley. It features dual ControlNet ports for high-speed communication. This controller supports up to 48K Words of user memory. It handles a mix of 2048 discrete I/O points. It works with various I/O platforms like 1771, 1794, 1746, and 1791. The controller includes multiple communication ports. These are serial, Data Highway Plus, Remote I/O, and ControlNet. It also supports battery-backed RAM and EEPROM backup.

Application Scenarios

This PLC suits distributed control systems. It works well in manufacturing automation. It can manage processes in assembly lines, packaging, and material handling. Its redundancy feature is ideal for critical processes. The dual ControlNet ports enable hot backup configurations. It integrates with various I/O modules for flexibility. Use it in industries like automotive, food and beverage, and oil and gas.

Technical Specifications

• Memory: 48 KWords user memory
• Total I/O: 2048 (any mix) or 2048 input / 2048 output in complementary mode
• Communication: Serial, DH+, RIO, DH via 1785-KA, two ControlNet ports
• Scan time: 0.5 ms per K word for bit logic, 2 ms per K word typical
• I/O chassis: 125 max total; 60 max universal remote chassis
• Battery: 1770-XYC for RAM retention
• Redundancy: Supports ControlNet hot backup with 1785-CBHM
• Hardware addressing: 2-slot, 1-slot, or 1/2-slot
• Module location: Left-most slot in 1771-A1B, -A2B, -A3B, -A3B1, -A4B chassis

Installation & Maintenance Guide

Install the 1785-L40C15 in the left-most slot of a compatible chassis. Ensure proper grounding and power supply. Replace the battery only while the processor has power. Use the 1770-XYC battery for RAM backup. Connect I/O modules via ribbon cable or ControlNet trunk line. Configure the controller using RSLogix 5 software. For redundancy, install the hot backup cartridge in each processor rack.

Packing List

• 1 x 1785-L40C15 Controller Module
• 1 x 1770-XYC Battery
• 1 x Quick Start Guide
• 1 x Product Documentation CD