Product Details
Overview
The Allen-Bradley 1785-L40E is a PLC-5/40E Ethernet/IP controller engineered for high-performance industrial automation and process control.
It provides robust communication, advanced data handling, and reliable system integration within PLC-5 networks.
Designed for complex automation tasks, this processor supports large I/O counts, multiple communication interfaces, and seamless connectivity with remote I/O systems.
Technical Specifications
• Manufacturer: Allen-Bradley
• Product Line: PLC-5 Series
• Model Number: 1785-L40E
• Product Type: Programmable Logic Controller (PLC)
• Processor Type: PLC-5/40E
• Memory Capacity: 48 KWords
• Battery Type: 1770-XYC (for memory retention)
• EEPROM Backup Support: Yes (supports 1785-ME16, -ME32, -ME64, -M100)
• Embedded Communication Interfaces:
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4 DH+/Remote I/O channels (Adapter or Scanner)
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1 Serial Port (RS-232/RS-422A/RS-423 configurable)
• Maximum Total I/O: 2048 (any mix) or 2048 in + 2048 out (complementary)
• Maximum Analog I/O: 2048
• I/O Scan Time (per rack):
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10 ms at 57.6 kbit/s
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7 ms at 115.2 kbit/s
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3 ms at 230.4 kbit/s
• I/O Link Capacity: Up to 32 per link
• Expansion Capacity: Supports 61 local and 60 remote I/O chassis
• Memory Type: Battery-backed static RAM
• Protected Memory: Not supported
• Power Dissipation: 17.3 W
• Backplane Current Load: 3.3 A
• Power Supply Compatibility: 1771-P4S, -P6S, -P4S1, -P6S1
• Operating Temperature Range: 0°C to 60°C (32°F to 140°F)
• Non-Operating Temperature Range: -40°C to 85°C (-40°F to 185°F)
• Weight: 1.36 kg (3.00 lbs)
Features
• EtherNet/IP Connectivity: Provides fast and secure communication between controllers, I/O, and supervisory systems.
• Scalable Architecture: Supports up to 2048 I/O points with modular expansion.
• High Reliability: Industrial-grade design ensures stability under temperature variations and harsh conditions.
• Flexible Communication: Multiple serial and DH+/Remote I/O ports enhance system integration.
• Modular Power Supply Support: Compatible with various 1771 series power modules for flexible configuration.
• Efficient Memory Management: 48K word capacity for large-scale automation programs.
Applications
The Allen-Bradley 1785-L40E controller is widely used in:
• Manufacturing automation lines
• Process control in oil, gas, and chemical industries
• Power generation and energy systems
• Material handling and logistics
• Water and wastewater treatment facilities
FAQ
Q1: What type of processor is the 1785-L40E?
A1: It is a PLC-5/40E processor with Ethernet/IP capability.
Q2: What communication interfaces does it support?
A2: The module supports DH+/Remote I/O and serial communication (RS-232/422A/423).
Q3: How much user memory is available?
A3: The controller offers 48 KWords of memory.
Q4: Is EEPROM backup supported?
A4: Yes, via 1785-ME16, -ME32, -ME64, and -M100 memory modules.
Q5: What power supplies are compatible with this model?
A5: It is compatible with 1771-P4S, -P6S, -P4S1, and -P6S1 supplies.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Redundant Automation Systems: Ensuring Continuous Uptime in Critical Control Infrastructure
System reliability directly determines operational profitability across high stakes process industries. Modern industrial automation platforms must eliminate single points of failure to prevent catastrophic shutdowns. Deploying fault tolerant architecture safeguards complex facilities against unexpected hardware glitches, network disruptions, and maintenance outages.
Understanding Types of Noise in Electronic Circuits and Control Systems
Signal integrity directly determines measurement accuracy and loop stability across industrial automation environments. Electronic noise introduces unwanted stochastic interference into analog loops, sensor feedback lines, and digital fieldbus networks. Understanding how intrinsic electronic noise and external electromagnetic interference manifest allows control engineers to optimize signal conditioning and shield sensitive instrumentation effectively.
Why 24V DC Power Supplies Standardize Modern Industrial Automation
Industrial control cabinets worldwide rely on 24V DC as the universal power standard for field instrumentation, sensors, and controllers. Walk into any manufacturing plant, and you will find PLCs, human-machine interfaces (HMIs), and smart actuators running on extra-low voltage DC. Standardizing on 24V DC enhances operational safety, lowers cabinet footprint, and maintains steady control performance across factory networks.