Loading
View all Compact I/O Modules
Print
Share
QR code
JSON
  • alt text
alt text
Chevron LeftChevron Left
alt text
Chevron LeftChevron Left
Allen-Bradley logo
1768-L43

CompactLogix L43 2MB Memory Controller

Serial #:
This product has not been verified. Please {} to confirm authenticity. register your product
Lifecycle status: Discontinued
ErrorsErrors
Rockwell Automation announces that as of June 30, 2020, the CompactLogix L43 2MB Memory Controller will be discontinued and no longer available for sale. Customers are encouraged to remove references to the affected product(s)
Discontinued Date: June 30, 2020 Replacement Category: Engineering Replacement
Product at a glance
Repairable/Replaceable Calculate your impact
  • Add to BOM
  • Repair services
  • Get support
1768-L43

CompactLogix L43 2MB Memory Controller

Serial #:
This product has not been verified. Please {} to confirm authenticity. register your product
  • alt text
alt text
Chevron LeftChevron Left
alt text
Chevron LeftChevron Left
Allen-Bradley logo
Lifecycle status: Discontinued
ErrorsErrors
Rockwell Automation announces that as of June 30, 2020, the CompactLogix L43 2MB Memory Controller will be discontinued and no longer available for sale. Customers are encouraged to remove references to the affected product(s)
Discontinued Date: June 30, 2020 Replacement Category: Engineering Replacement
Product at a glance
Repairable/Replaceable Repairable/Replaceable
  • Add to BOM
  • Repair services
  • Get support
Find your nearest distributor
Contact your distributor in {0}
Change location
PhonePhone
Find a partner
Find your nearest distributor
Contact your distributor in {0}
Change location
PhonePhone
Find a partner
Overview
Electrical & Connectivity
General Features
Power & Electrical Characteristics
Physical Characteristics
Mechanical
Construction
Compliance & Environment
Standards & Protection
Documents
Downloads
Alternative Products
Technotes
Unique Product Identifier
1768-L43
UPC
612598307531
Standard Warranty Duration

1 year See details

Country of Origin
Singapore
Communication
RS232
Height
131.6mm, 5.18"
Isolation
3 V (continuous), functional insulation type, Type tested at 5V AC @ 6s; RS-232 to system
Memory
2 MB
1768 current draw
2.8A @ 5V DC
1769 current draw
2.0A @ 5V DC
Available user memory
2 MB
Backplane current draw
1.3A @ 24V DC
Communication bus
RS-232
Communication medium copper
True
Communication medium fibre optic
False
Communication medium wireless
False
Communications protocol
Other
Expandable
True
Failsafe model
False
Isolation voltage
30V (continuous), functional insulation type, Type tested at 500V AC @ 60s, RS-232 to system
LED indicator inputs
False
LED indicator outputs
False
Module expansion capacity
Two 1768 modules, Sixteen 1769 modules
Number of 1768 communication modules, max
2
Number of 1768 modules, max
2
Number of 1768 motion modules, max
2
Number of 1769 I/O modules, max
16
Number of I/O banks, max
2
Power consumption
31.3 W
Power dissipation
6.3 W
Power supply
1768-PA3, 1768-PB3
Power supply distance rating
4 modules
Programming languages
Relay ladder, Structured text, Function block, Sequential function Chart
Protection for local controls
False
Serial cable
1756-CP3 or 1747-CP3, right angle connector to controller, straight to serial port, 3 m
Slot width
1
Standard applications available
True
Total 1768 and 1769 current draw
4.8A @ 5V DC
Voltage type
DC
Wire category
2 - on communication ports
Mechanical
Communication ports
RS-232, Fully isolated, 38.4 Kbps max
DIN-rail mounting
True
Module location
DIN rail or panel mount
Panel-mounting screw torque
1.16 Nm (10 in-lb) - use M4 or #8 screws
Weight, approx
0.34 kg
With PC connection
True
With display
False
Construction
Depth
121.1 mm
Enclosure type rating
None (open-style)
Height
131.1 mm
Suitable for front mounting
True
Width
56.4 mm
With base plate
False
Conducted RF immunity
10V rms with 1 kHz sine-wave 80% AM from 150 kHz...80 MHz
EFT/B immunity
±4kV @ 5kHz on communication ports
ESD immunity
6 kV contact discharges, 8 kV air discharges
Emissions
CISPR 11 (IEC 61000-6-4)
Operating temperature
0 °C
Radiated RF immunity
10 V/m with 1 kHz sine-wave 80% AM from 80...2000 MHz, 10 V/m with 200 Hz 50% Pulse 100% AM @ 900 MHz, 10 V/m with 200 Hz 50% Pulse 100% AM @ 1890 MHz, 3 V/m with 1 kHz sine-wave 80% AM from 2000...2700 MHz
Relative humidity
5...95% noncondensing
Shock
Operating: 30 G
Storage temperature
-40 °C
Surge transient immunity
±2 kV line-earth (CM) on communication ports
Surrounding air temperature, max
60 °C
Vibration
5 G @ 10...500 Hz
Technical Data Publication
1769-td005_-en-p 1769-TD005
Looking for more documentation?
Find curated technical documentation for this product in the Technical Documentation Center, or search our full Literature Library.
Visit the Technical Documentation Center Search the Literature Library
Available Downloads
  • Firmware for 1768-L43 v20.019
  • EDS files for 1768-L43 (multi)
  • EDS files for CompactLogix Family (multi)
See All Downloads
Items Per Page:
1-1 of 1
Technotes
Looking for more Technotes?
Find questions and answers from Rockwell Automation technical experts for this product in our Knowledgebase.
Search Knowledgebase
Overview
Unique Product Identifier
1768-L43
UPC
612598307531
Standard Warranty Duration

1 year See details

Country of Origin
Singapore
Electrical & Connectivity
Communication
RS232
Height
131.6mm, 5.18"
Isolation
3 V (continuous), functional insulation type, Type tested at 5V AC @ 6s; RS-232 to system
Memory
2 MB
1768 current draw
2.8A @ 5V DC
1769 current draw
2.0A @ 5V DC
Available user memory
2 MB
Backplane current draw
1.3A @ 24V DC
Communication bus
RS-232
Communication medium copper
True
Communication medium fibre optic
False
Communication medium wireless
False
Communications protocol
Other
Expandable
True
Failsafe model
False
Isolation voltage
30V (continuous), functional insulation type, Type tested at 500V AC @ 60s, RS-232 to system
LED indicator inputs
False
LED indicator outputs
False
Module expansion capacity
Two 1768 modules, Sixteen 1769 modules
Number of 1768 communication modules, max
2
Number of 1768 modules, max
2
Number of 1768 motion modules, max
2
Number of 1769 I/O modules, max
16
Number of I/O banks, max
2
Power consumption
31.3 W
Power dissipation
6.3 W
Power supply
1768-PA3, 1768-PB3
Power supply distance rating
4 modules
Programming languages
Relay ladder, Structured text, Function block, Sequential function Chart
Protection for local controls
False
Serial cable
1756-CP3 or 1747-CP3, right angle connector to controller, straight to serial port, 3 m
Slot width
1
Standard applications available
True
Total 1768 and 1769 current draw
4.8A @ 5V DC
Voltage type
DC
Wire category
2 - on communication ports
Physical Characteristics
Mechanical
Communication ports
RS-232, Fully isolated, 38.4 Kbps max
DIN-rail mounting
True
Module location
DIN rail or panel mount
Panel-mounting screw torque
1.16 Nm (10 in-lb) - use M4 or #8 screws
Weight, approx
0.34 kg
With PC connection
True
With display
False
Construction
Depth
121.1 mm
Enclosure type rating
None (open-style)
Height
131.1 mm
Suitable for front mounting
True
Width
56.4 mm
With base plate
False
Compliance & Environment
Conducted RF immunity
10V rms with 1 kHz sine-wave 80% AM from 150 kHz...80 MHz
EFT/B immunity
±4kV @ 5kHz on communication ports
ESD immunity
6 kV contact discharges, 8 kV air discharges
Emissions
CISPR 11 (IEC 61000-6-4)
Operating temperature
0 °C
Radiated RF immunity
10 V/m with 1 kHz sine-wave 80% AM from 80...2000 MHz, 10 V/m with 200 Hz 50% Pulse 100% AM @ 900 MHz, 10 V/m with 200 Hz 50% Pulse 100% AM @ 1890 MHz, 3 V/m with 1 kHz sine-wave 80% AM from 2000...2700 MHz
Relative humidity
5...95% noncondensing
Shock
Operating: 30 G
Storage temperature
-40 °C
Surge transient immunity
±2 kV line-earth (CM) on communication ports
Surrounding air temperature, max
60 °C
Vibration
5 G @ 10...500 Hz
Documents
1769-td005_-en-p Technical Data
1769-TD005
Technical Data Publication
1769-td005_-en-p 1769-TD005
Looking for more documentation?
Find curated technical documentation for this product in the Technical Documentation Center, or search our full Literature Library.
Visit the Technical Documentation Center Search the Literature Library
Downloads
Available Downloads
  • Firmware for 1768-L43 v20.019
  • EDS files for 1768-L43 (multi)
  • EDS files for CompactLogix Family (multi)
See All Downloads
Alternative Products
Items Per Page:
1-1 of 1
Technotes
Technotes
Looking for more Technotes?
Find questions and answers from Rockwell Automation technical experts for this product in our Knowledgebase.
Search Knowledgebase
InformationInformation
Multiple countries of origin based on manufacturing location
CompactLogix L43 2MB Memory Controller
CloseClose
1768-L43
Close
Print
Phone:
Call
InformationInformation

Please review your distributor selection

Choose distributor
Rockwell Automation Home
Copyright ©2026 Rockwell Automation, Inc.
Environmental compliance inquiry
All fields with * are required.
This field is required
This field is required
This field is required
This field is required
This field is required
This field is required
Your inquiry has been successfully submitted.
Please allow up to 5 business days to receive a response to your inquiry.
You can now close this window.
There was an error submitting your inquiry.
Please try again.
Sign in to your Rockwell Automation account to submit a repair documentation request.
Sign In
Request repair documentation
All fields with * are required for processing your request.
Please enter your business email address
This field is required
This field is required
This field is required
This field is required
Documentation of liability insurance is required for anyone who is requesting documentation for product repairs.
UploadUpload
Please upload documentation of liability insurance.*
1 file selected
CloseClose
File size is too large. Must be less than 5 MB.
Accepted file types: zip, pdf; Maximum size: 5 MB.
This field is required
Right to Repair Terms and Conditions
Rockwell Automation is making, parts, and service documentation available at your request in compliance with applicable right to repair laws and regulations. By signing below, you are agreeing to the following terms and conditions of your purchase of Rockwell Automation genuine repair parts for repair of a Rockwell Automation product. As used below, “Self Service Repair Parts” means genuine Rockwell Automation parts (components of Rockwell Automation products) purchased from Rockwell Automation for installation in a Rockwell Automation product as part of a Self Service Repair. Self Service Repair Parts may be new or previously used genuine Rockwell Automation parts that have been tested and passed Rockwell Automation functional requirements. “Self Service Repair Tools” means equipment and related materials purchased for the purpose of performing repairs.
This field is required
Your request has been successfully submitted.
Please allow up to 5 business days to receive a response to your inquiry.
This catalog number is not currently eligible, please check the number you have entered or learn more about our repair services offered.
  1. Chevron LeftChevron Left Rockwell Automation Home
  2. Chevron LeftChevron Left Products
Please update your cookie preferences to continue.
This feature requires cookies to enhance your experience. Please update your preferences to allow for these cookies:
  • Social Media Cookies
  • Functional Cookies
  • Performance Cookies
  • Marketing Cookies
  • All Cookies
You can update your preferences at any time. For more information please see our {0} Privacy Policy
CloseClose