1785-L40E

Overview of Allen-Bradley 1785-L40E Ethernet PLC-5 Controller

The Allen-Bradley 1785-L40E is an Ethernet-enabled PLC-5 programmable logic controller designed for medium to large industrial applications. It offers 48K words of user memory and supports up to 2048 I/O points, allowing extensive control capabilities. The controller features integrated communication ports including Ethernet, Data Highway Plus (DH+)/Remote I/O, and RS-232/422/423 serial interfaces, providing versatile network connectivity.

Key Features of Allen-Bradley 1785-L40E

• User Memory: 48,000 words (48K) for program and data storage.
• I/O Capacity: Supports up to 2048 inputs and 2048 outputs in any mix (complementary mode supported).
• Communication Ports: One Ethernet port (10/100 Mbps); two DH+/Remote I/O ports; one serial port configurable for RS-232, RS-422, or RS-423.
• Programming Support: Supports IEC 61131-3 languages including Ladder Logic, Structured Text, and Sequential Function Chart.
• Power Supply Compatibility: Supports 1771 chassis with various power supplies such as 1771-P4S, P6S, and their variants.
• Backup Memory: Battery-backed static RAM with replaceable lithium battery (1770-XYC); supports optional EEPROM memory modules.
• High I/O Chassis Support: Can address up to 61 chassis including local and remote I/O racks.
• Operating Environment: 0–60°C operating temperature with 5–95% non-condensing humidity.
• Certifications: CSA, UL, CE, C-TICK compliant with industrial standards for safety and reliability.

Technical Specifications of 1785-L40E

Applications / Use Case of Allen-Bradley 1785-L40E

The 1785-L40E is widely used in manufacturing and process control applications requiring robust, high-capacity PLC solutions with Ethernet connectivity. It is suitable for controlling complex machine and process systems with extensive I/O and networking requirements, supporting both local and distributed control architectures.