Allen-Bradley 1756-L55M16 ControlLogix Controller

SKU 1756-L55M16

In stock

12-month warranty
Free returns within 30 days

Manufacturer: Allen-Bradley
Product No.: 1756-L55M16
Country of origin:United States
Product Type: ControlLogix Controller
Barcode: 8537101190
Payment: T/T, Western Union
Weight: 350g
Shipping port: Xiamen
Warranty: 12 months

Description

The Allen-Bradley 1756-L55M16 is a ControlLogix5555 programmable automation controller designed for chassis-based industrial control applications. This unit features an integrated 1756-M16 memory board providing 1.5 MB of data and logic memory capacity. Positioned in any slot of a ControlLogix chassis, the 1756-L55M16 manages sequential, process, motion, and drive control tasks while providing built-in serial RS-232 communication capability for workstation interface and system diagnostics.

Features

Equipped with a 1756-M16 memory board providing 1.5 MB of memory.
Integrates a front-panel RS-232 serial communication port.
Supports insertion and removal under power (RIUP) within the chassis backplane.
Features front status indicators including RUN, I/O, FORCE, RS232, BAT, and OK.
Includes a 3-position front keyswitch for selecting RUN, REM, and PROG modes.

Applications

Industrial automation control systems
Sequential and process control execution
Chassis-based ControlLogix system architecture

Technical Specifications

Specification	Value
Model	1756-L55M16
Controller Family	ControlLogix5555
Included Memory Board	1756-M16
Data and Logic Memory	1.5 MB
Nonvolatile Memory	No
Backplane Current @ 5.1V DC	1.23 A
Backplane Current @ 24V DC	0.014 A
Power Dissipation	5.6 W
Thermal Dissipation	19.1 BTU/hr
Operating Temperature	0 to 60 degC (32 to 140 degF)
Storage Temperature	-40 to 85 degC (-40 to 185 degF)
Relative Humidity	5 to 95% noncondensing
Vibration	2 g @ 10 to 500 Hz
Operating Shock	30 g
Nonoperating Shock	50 g
ESD Immunity	6 kV contact discharges, 8 kV air discharges
Radiated RF Immunity	10V/m (80 to 2000 MHz), 1V/m (2.0 to 2.7 GHz)
EFT/B Immunity	±4 kV at 5 kHz on communications ports
Surge Transient Immunity	±2 kV line earth (CM) on communications ports
Conducted RF Immunity	10V rms with 1 kHz sine-wave 80% AM (150 kHz to 80 MHz)
Isolation Voltage	30V continuous, Basic Insulation Type, RS232 to system
Replacement Battery	1756-BA1
Enclosure Type Rating	None (open style)
North American Temp Code	T4A
IEC Temp Code	T4
Weight	Approx. 0.35 kg (12.5 oz)

Connections/Interfaces

Connector Pin	Function
Pin 1	DCD (Data Carrier Detect)
Pin 2	RXD (Receive Data)
Pin 3	TXD (Transmit Data)
Pin 4	DTR (Data Terminal Ready)
Pin 5	GND (Ground)
Pin 6	DSR (Data Set Ready)
Pin 7	RTS (Request to Send)
Pin 8	CTS (Clear to Send)
Pin 9	N/C (Not Connected)

Installation Guidelines

Chassis Mounting: Align the module circuit board with top and bottom chassis guides and slide into any slot until latches engage flush.
Static Safeguards: Wear a grounded wriststrap and avoid touching circuit components or connector pins during handling.
Battery Maintenance: Connect only a 1756-BA1 battery or 1756-BATM battery module to maintain memory power when chassis power is removed.
Serial Cabling: Limit custom RS-232 cable lengths to 15.2 m (50 ft) and connect the cable shield at both connector ends.
Power/Hazard Precautions: Ensure power is removed or the location is nonhazardous prior to inserting/removing the controller or connecting serial cabling.

Compliance and Certifications

UL Listed Industrial Control Equipment (File E65584)
CSA Certified Process Control Equipment (File LR54689C)
CSA Certified Process Control Equipment for Class I, Division 2 Group A,B,C,D Hazardous Locations (File LR69960C)
CE Compliance (EMC Directive 2004/108/IEC: EN 61326-1, EN 61000-6-2, EN 61000-6-4, EN 61131-2)
C-Tick Compliant (AS/NZS CISPR 11)
EEx ATEX Directive 94/9/EC Compliant (EN 60079-15, Zone 2)

FAQ

What memory board is installed on this controller?

This unit comes equipped with an integrated 1756-M16 memory board providing 1.5 MB of data and logic memory.

Which replacement battery should be used with the controller?

The controller uses a 1756-BA1 battery or a 1756-BATM battery module to maintain internal memory power.

What programming cable is compatible with the serial port?

The serial port supports communication via a 1756-CP3 or 1747-CP3 serial cable.

View all FAQs →

Product Documentation

Technical Datasheet (PDF) Complete specifications and technical drawings.

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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 technical warranty.

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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	AC-powered