ControlLogix 5580 Controller 1756-L81E 3MB PLC Module

Manufacturer	Allen Bradley
Part Number	1756-L81E
Product Type	PLC

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Description
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Overview

1756-L81E is a ControlLogix 5580 series CPU module, MB user memory, built-in Gigabit EtherNet/IP and USB interfaces, supports 128,000 discrete I/O, no battery backup is required, supports up to 60 EtherNet/IP devices, supports Device Level Ring (DLR) redundant network, supports up to 128,000 discrete I/O, 4,000 analog I/O.

Parameter

Parameter	1756-L81E	1756-L82E	1756-L83E	1756-L81ES
Product Type	Standard ControlLogix 5580 PAC	Standard ControlLogix 5580 PAC	Standard ControlLogix 5580 PAC	Fail-safe ControlLogix 5580 PAC
User Memory (Program+Data)	3 MB	8 MB	16 MB	3 MB
Processor Speed	1.6 GHz	1.6 GHz	1.6 GHz	1.6 GHz
Max Discrete I/O Capacity	128,000	128,000	128,000	128,000
Max Analog I/O Capacity	4,000	4,000	4,000	4,000
Communication Interfaces	1×Gigabit EtherNet/IP, 1×USB 2.0	1×Gigabit EtherNet/IP, 1×USB 2.0	1×Gigabit EtherNet/IP, 1×USB 2.0	1×Gigabit EtherNet/IP, 1×USB 2.0
Functional Safety Feature	None	None	None	SIL 3, PL e compliant; Supports safety programs
Programming Software	Studio 5000 Logix Designer V28+	Studio 5000 Logix Designer V28+	Studio 5000 Logix Designer V28+	Studio 5000 Logix Designer V28+ + Safety Add-on
Power Backup	No battery required (integrated energy storage)	No battery required (integrated energy storage)	No battery required (integrated energy storage)	No battery required (integrated energy storage)
Typical Application	Medium-scale discrete/process control	Large-scale complex control	High-demand hybrid control (motion+process)	Safety-related industrial control systems

FAQ:

1.How many EtherNet/IP devices can the 1756-L81E support?

The 1756-L81E supports up to 100 EtherNet/IP devices (nodes), and the protective coating version 1756-L81EK supports up to 60 EtherNet/IP devices.

2.Is the 1756-L81E compatible with all 1756 Series I/O modules and expansion racks?

1756-L81E is not compatible with all 1756 series I/O modules and expansion racks, and has version and function limitations.

Compatible racks: 1756-A4/A7/A10/A13/A17 (Series B/C) and XT series racks; not compatible with Series A racks
Compatible modules: most standard digital/analog I/O, communications modules (1756-EN2T/CN2R, etc.)

3.Can the 1756-L81E be directly replaced by the 1756-L81ES for safety related projects?

1756-L81E is a standard ControlLogix controller without safety certification and safety execution engine; 1756-L81ES is a GuardLogix safety controller with SIL 3/PL e functional safety certification and supports CIP Safety and safety I/O modules. The two hardware pins are compatible but the safety functions are completely different.