Allen-Bradley 1756-L55M12 ControlLogix 5555 Controller

SKU 1756-L55M12

In stock

12-month warranty
Free returns within 30 days

Manufacturer: Allen-Bradley
Product No.: 1756-L55M12
Country of origin:United States
Product Type: ControlLogix Controller
Barcode: 8537101190
Payment: T/T, Western Union
Weight: 370g
Dimensions: 140 mm x 35 mm x 145 mm (H x W x D)
Shipping port: Xiamen
Warranty: 12 months

Description

The Allen-Bradley 1756-L55M12 is a ControlLogix 5555 processor module designed for high-performance industrial control applications. The 1756-L55M12 controller provides 750 Kbytes of user memory for data and logic programs, along with 208 Kbytes of dedicated I/O memory, operating without nonvolatile memory storage. The unit has an open-style enclosure rating and supports various communication networks across the ControlLogix platform, including ControlNet, EtherNet/IP, DH+, DeviceNet, and Universal Remote I/O networks. Multiple 1756-L55 controllers can be integrated into a redundant controller system configured within a ControlNet network.

Features

750 Kbytes user memory for data and logic
208 Kbytes dedicated I/O memory
Fast program scan time of 0.08 milliseconds
Supports up to 128,000 total I/O points
Supports up to 4,000 analog inputs and 2,000 analog outputs
Multi-protocol communication support across EtherNet/IP, ControlNet, DeviceNet, DH+, and Universal Remote I/O
Redundancy capability over ControlNet networks
Compatible with serial cables 1756-CP3 or 1747-CP3

Applications

Industrial PLC and DCS control systems
High-speed discrete logic processing
Multi-axis and complex analog process control
Redundancy systems via ControlNet networks
Distributed plant automation systems

Technical Specifications

Parameter	Specification
Manufacturer	Allen-Bradley
Product Line	ControlLogix
Category	PLCs / Processor Module
Part Number	1756-L55M12
User Memory (Data and Logic)	750 Kbytes
I/O Memory	208 Kbytes
Maximum I/O Capacity	128,000
Maximum Analog Inputs	4,000
Maximum Analog Outputs	2,000
Program Scan Time	0.08 ms
Backplane Current (5.1V DC)	1.23 A
Backplane Current (24V DC)	0.014 A (14 mA)
Power Dissipation	5.6 W
Thermal Dissipation	19.1 BTU/hr
Continuous Isolation Voltage	30V (Basic Insulation Type)
Dielectric Withstand Voltage	707V DC for 60 s
Conducted RF Immunity	10V rms with 1 kHz sine-wave 80% AM (150 kHz to 80 MHz)
Battery Type	1756-BA1 or 1756-BATM (1756-BA1 weight: 0.59 g)
Serial Cable Compatibility	1756-CP3 or 1747-CP3
Communication Wiring Category	2 (on communication ports)
Enclosure Type	Open Style
Operating Temperature	0 to 60 degC (32 to 140 F)
Storage Temperature	-40 to 85 degC
Relative Humidity	5% to 95% (noncondensing)
Operating Shock	30 g
Non-Operating Shock	50 g
Vibration	2 g at 10 to 500 Hz
Weight	0.81 lbs (0.37 kg / 12.5 oz)
UPC	10612598286628

Installation Guidelines

Ensure power to the ControlLogix chassis is disconnected prior to installing or removing the module.
Mount the unit into any available slot of a 1756 ControlLogix chassis.
Maintain adequate panel ventilation to keep ambient temperatures within 0 to 60 degC during operation.
Use 1756-CP3 or 1747-CP3 serial cables for direct serial interface connectivity.
Maintain proper ground connection on the chassis backplane to mitigate EMI/RFI interference.
Install a fresh 1756-BA1 or 1756-BATM lithium battery to retain volatile memory when the module is powered down.

FAQ

What battery types are used with this processor module to preserve memory?

The module uses either a 1756-BA1 or 1756-BATM lithium battery to maintain volatile memory when main system power is off.

What is the maximum I/O capacity supported by the device?

The processor supports up to 128,000 total I/O points, including up to 4,000 analog inputs and 2,000 analog outputs.

Which programming cables are compatible with the controller serial port?

The serial communication port is compatible with either the 1756-CP3 or 1747-CP3 programming cables.

What is the operating temperature range for the device?

The operating temperature range is from 0 degC to 60 degC (32 F to 140 F).

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Global Express Shipping

Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).

For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

Color pattern	Black
Country of origin	United States
Power source	DC Power Battery-powered