Description

The Allen-Bradley 1756-L71 GuardLogix 5570 is a high-performance programmable automation controller designed for integrated standard and safety control within the ControlLogix platform. This controller combines standard automation logic and functional safety in a single architecture, allowing both applications to execute within the same chassis while remaining logically independent. The conformal coating provides enhanced protection against corrosive atmospheres, meeting Severity Level G3 per ANSI/ISA 71.04-2013 and Severity Level C4 per IEC 60721-3-5:2018.

Features

• Integrated standard and safety control platform
• 2 MB standard user memory and 1 MB dedicated safety memory
• Supports up to 128,000 digital I/O and 4,000 analog I/O
• Up to 500 controller communication connections
• Integrated motion support over EtherNet/IP
• Conformal coating for harsh industrial environments
• Energy Storage Module (ESM) replaces traditional batteries for data retention

Applications

• Water/Wastewater: Chemical dosing and effluent valve control
• Oil/Gas/Petrochemical: Pressure loop management and burner gas-feed systems
• Food/Beverage: PID-based temperature control for mixing and cooking
• Power Generation: Steam governor actuation and cooling tower fan management

Technical Specifications

Installation Guidelines

• The controller installs into any slot of a 1756 ControlLogix chassis.
• Use the provided plastic keying system to prevent incorrect module placement in the chassis.
• Ensure the Energy Storage Module (ESM) is properly seated; the controller does not use traditional batteries.
• When using an SD card for non-volatile storage, insert with the beveled corner facing up and contacts on the right until it clicks.
• Maintain proper ventilation within the cabinet to stay within the 0 to 60 degC operating range.
• Always power down the chassis before inserting or removing the controller module to prevent electrical damage.

FAQ

What are the memory capacities?

The 1756-L71 features 2 MB of user memory and 0.98 MB of I/O memory, with 1 GB of non-volatile storage provided by the pre-installed SD card.

Does it require a battery?

No. The 1756-L71 utilizes an Energy Storage Module (ESM) to preserve controller memory during power interruptions, eliminating the need for traditional batteries.

Does it have an embedded Ethernet port?

No. The controller features a USB 2.0 port for local programming and maintenance. Communication with EtherNet/IP, ControlNet, or DeviceNet networks requires a dedicated communication bridge module in the chassis.