AB 1756-L61/B
AB 1756-L61/B
AB 1756-L61/B
AB 1756-L61/B
AB 1756-L61/B
AB 1756-L61/B
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  • Lifecycle status

    Discontinued
    Discontinued date: 2017-06-01

1756-L61/B

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Allen-Bradley 1756-L61/B is a Series B ControlLogix 5561 controller with 2 MB of data and logic memory.
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Technical specifications for 1756-L61/B

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1756-L61/B
  • Product Family:
    ControlLogix
  • Product Type:
    ControlLogix 5561 2 MB Controller, Series B
  • Stock:
    1
  • Data and Logic Memory:
    2 MB
  • I/O Memory:
    478 KB
  • Nonvolatile Memory:
    Optional 1784-CF64 CompactFlash
  • Local Communication Port:
    RS-232
  • Current at 5.1 V DC:
    1.20 A
  • Current at 24 V DC:
    14 mA
  • Power Dissipation:
    3.5 W
  • Thermal Dissipation:
    11.9 BTU/h
  • Operating Temperature:
    0–60 °C
  • Storage Temperature:
    -40–85 °C
  • Relative Humidity:
    5–95%, non-condensing
  • Vibration:
    2 g at 10–500 Hz
  • Operating Shock:
    30 g
  • Nonoperating Shock:
    50 g
  • Enclosure Type:
    Open-style
  • Isolation Voltage:
    30 V continuous, RS-232-to-system
  • Serial Cables:
    1756-CP3 or 1747-CP3
  • Battery:
    1756-BA2
  • Minimum Firmware:
    13.40
  • Dimensions:
    3.5x14x14.5cm
  • Weight:
    0.35 kg
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Project capacity Chassis placement Service preparation Application
  • Series B ControlLogix 5561 controller with 2 MB data and logic memory
  • 478 KB I/O memory with optional 1784-CF64 CompactFlash nonvolatile storage
  • ControlLogix chassis controller with RS-232 local communication and 1756-BA2 battery support

1756-L61/B is the Series B version of the Allen-Bradley ControlLogix 5561 controller.

The controller provides 2 MB of data and logic memory, 478 KB of I/O memory, an RS-232 port, and support for optional 1784-CF64 CompactFlash storage.

Before replacement, preserve the complete project and verify Series B hardware, firmware, memory use, battery condition, communication modules, I/O ownership, chassis power, and all controller connections.

Availability, condition, price, and shipping time for 1756-L61/B are confirmed during quotation.

Allen-Bradley 1756-L61/B ControlLogix Controller Manuals, Datasheets, Links

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

  • Provides 2 MB of data and logic memory
  • Provides 478 KB of dedicated I/O memory
  • Supports optional 1784-CF64 CompactFlash project storage
  • Allen-Bradley 1756-L61/B occupies one slot in a ControlLogix chassis
  • The controller must use the chassis slot assigned in the saved ControlLogix project
  • Confirm chassis power capacity and the positions of communication and I/O modules before startup
  • Back up the complete controller project before removing the unit
  • Inspect the 1756-BA2 battery and verify chassis power
  • Match the RS-232 cable, communication modules and I/O ownership
  • ControlLogix 5560 chassis-based control applications
  • Discrete, analog, motion and communication-system coordination
  • Series B replacement of a documented 1756-L61 controller
Description
1756-L61/B is the Series B Allen-Bradley ControlLogix 5561 controller with 2 MB of data and logic memory.

The chassis-based controller provides 478 KB of I/O memory, an RS-232 service interface, 1756-BA2 battery support and optional 1784-CF64 CompactFlash storage.

Before replacement, retain the controller project and verify Series B hardware, firmware, memory use, battery condition, chassis power, communication modules, I/O ownership and controller connections.
Revisions

Revision Part #

Also known as

1756-L61 Ser B
1756-L61/B, Series B, Rev B
Alternative Names
1756-L61/B 1756-L61 B 1756-L61B 1756-L61 Series B 1756-L61 Rev B Allen-Bradley 1756-L61/B AB 1756-L61/B ControlLogix 1756-L61/B
Technical notes
Allen-Bradley 1756-L61/B is the Series B 2 MB ControlLogix 5561 controller; verify firmware 13.40 or later, 1756-BA2 battery, memory use, RS-232 service, chassis, and complete project before replacement.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What label evidence should a buyer request for Allen-Bradley 1756-L61/B?
The controller label must show catalog number 1756-L61 and Series B; also retain a clear nameplate image and the installed firmware record.
What memory limits must be checked before moving a project to Allen-Bradley 1756-L61/B?
Confirm that the application fits within 2 MB of data and logic memory and 478 KB of I/O memory.
Can Allen-Bradley 1756-L61/B retain a project without the optional CompactFlash card?
The controller can use battery-backed volatile memory; 1784-CF64 CompactFlash is the documented optional nonvolatile storage device.
What maintenance item should be inspected when servicing Allen-Bradley 1756-L61/B?
Inspect the documented 1756-BA2 battery, review its status and service history, and preserve the controller project before disturbing battery-backed memory.
Which local service cable must match Allen-Bradley 1756-L61/B?
Use the RS-232 service port with a compatible 1756-CP3 or 1747-CP3 cable and verify the workstation communication settings before connection.
What software evidence should be obtained before replacing Allen-Bradley 1756-L61/B?
Retain the project archive, controller firmware revision, programming-software compatibility, module ownership, and communication configuration; the official Series B installation data lists firmware 13.40 as the minimum.
What must be validated after replacing Allen-Bradley 1756-L61/B?
Verify project integrity, module ownership, communications, I/O connections, chassis power, controller mode, battery status, and all application-specific tests.

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