Product Overview

The Allen-Bradley 1756-L85EP is a ControlLogix 5580E process controller. This module belongs to the ControlLogix 5580 family from Rockwell Automation. It provides 40MB of user memory for complex control applications. The Allen-Bradley 1756-L85EP features a 1GB Ethernet port for high-speed networking. Users trust this controller for demanding process control and large I/O applications.

Technical Specifications

The 1756-L85EP delivers powerful processing with extensive I/O capacity. Below are the complete technical details.

General Specifications

• Brand: Allen-Bradley / Rockwell Automation for industrial control reliability.

• Series: ControlLogix 5580 family.

• Part Number: 1756-L85EP for precise identification.

• Product Type: Controller (Process Controller).

• Compatibility: ControlLogix 5580 systems.

• Display: 4 Character Alpha/Numeric Display for status.

• Software Support: Studio 5000 Automation Engineering and Design Environment.

Memory Specifications

• User Memory: 40 Megabytes.

• Memory Type: High-capacity for complex applications.

• Programming Environment: Studio 5000 compatible.

I/O Capacity

• Maximum Total I/O: 128,000 points.

• Maximum Digital I/O: 128,000 points.

• Maximum Analog I/O: 4,000 points.

• EtherNet/IP Devices: Supports up to 300 devices.

Communication Specifications

• Ethernet Speeds: 10/100/1000 Mbps (1GB Ethernet port).

• USB Speed: 12 Mbps (USB 2.0 port).

• Ethernet Connection: Direct connection without intermediate bridge module.

• Network Support: 10 Mbps, 100 Mbps, and 1000 Mbps link speeds.

Power and Thermal Specifications

• Power Dissipation: 6.2 Watts.

• Thermal Dissipation: 21.2 BTU per hour.

• Current at 5 Volts DC: 1.2 Amps.

• Current at 1.2 Volts DC: 5 milliamps.

• Power Source: Draws from ControlLogix chassis power supply.

Chassis Compatibility

• Primary Chassis: ControlLogix Series C chassis.

• Secondary Chassis: Series B chassis with derated temperature range.

• Slot Installation: Vertical installation in any slot of compatible chassis.

• Mounting: Open enclosure design.

Environmental Specifications

• Operating Temperature: 32 to 140°F (0 to 60°C).

• Non-Operating Temperature: 32 to 122°F (0 to 50°C).

• Series C Maximum Ambient: 140°F (60°C) maximum.

• Relative Humidity: 5 to 95% non-condensing.

• Vibration Rating: 2 g at 10 to 500 Hertz.

• Operating Shock: 30 g.

• Non-Operating Shock: 30 g.

• ATEX Rating: Complies with T4 ATEX temperature code rating.

Installation Guide

Follow these steps to install the Allen-Bradley 1756-L85EP correctly.

1. Power Down the Chassis: Turn off all power to the ControlLogix rack.

2. Verify Chassis Type: Confirm Series C chassis for full temperature range.

3. Locate an Available Slot: Find any slot in the compatible chassis.

4. Insert the Module: Slide the 1756-L85EP into the slot carefully.

5. Secure the Module: Lock using the retaining clips at top and bottom.

6. Connect Ethernet Cable: Attach CAT5e or CAT6 cable to the 1GB port.

7. Connect USB Device: Use USB 2.0 port for programming or data transfer.

8. Verify Power Supply: Ensure chassis power supply provides 1.2A at 5V DC.

9. Apply Power: Turn on the chassis power supply.

10. Check Display: Observe the 4-character alphanumeric display for status.

11. Launch Studio 5000: Open the Automation Engineering and Design Environment.

12. Configure Ethernet: Set IP address for 10/100/1000 Mbps operation.

13. Add Devices: Configure up to 300 EtherNet/IP devices.

14. Download Program: Transfer the control application to 40MB user memory.

15. Verify Operation: Test I/O up to 128,000 total points.

Installation Notes

• The controller supports direct Ethernet connection without bridge modules.

• Power dissipation is 6.2 Watts with 21.2 BTU per hour heat output.

• The module draws 1.2 Amps at 5 Volts DC from the backplane.

• Series B chassis requires derated temperature operation.

• The open enclosure complies with T4 ATEX temperature code rating.

Packaging List

This unit ships as a new and original product.

• Allen-Bradley 1756-L85EP ControlLogix 5580E Process Controller

• Product data sheet with specifications

• Studio 5000 compatibility guide

• Anti-static factory packaging box

Frequently Asked Questions (FAQ)

1. How much user memory does the 1756-L85EP provide?
The Allen-Bradley 1756-L85EP provides 40 Megabytes of user memory. This supports complex process control applications with large data tables.

2. What are the Ethernet speeds supported by this controller?
The 1756-L85EP supports 10/100/1000 Mbps Ethernet link speeds. The 1GB port enables high-speed communication with up to 300 EtherNet/IP devices.

3. What is the maximum I/O capacity of the 1756-L85EP?
The Allen-Bradley 1756-L85EP supports up to 128,000 total I/O points. This includes 128,000 digital I/O and 4,000 analog I/O points.

4. What chassis are compatible with the 1756-L85EP?
The 1756-L85EP works in ControlLogix Series C chassis. It can also work in Series B chassis with a derated temperature range.

5. What software is required to program this controller?
The Allen-Bradley 1756-L85EP is supported in the Studio 5000 Automation Engineering and Design Environment. This provides programming and configuration capabilities.