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1756-L62

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Allen-Bradley 1756-L62 is a ControlLogix 4 MB memory controller that manages large-scale automation tasks and supports up to 128,000 I/O points.
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Technical specifications for 1756-L62

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1756-L62
  • Product Family:
    ControlLogix
  • Product Type:
    ControlLogix 4 MB Memory Controller
  • Stock:
    2
  • User memory:
    4 MB
  • I/O memory:
    478 KB
  • Optional nonvolatile memory storage:
    128 MB (1784-CF128)
  • Digital I/O, max:
    128,000
  • Analog I/O, max:
    4000
  • Total I/O, max:
    128,000
  • Replacement battery:
    Series A: 1756-BA1, 1756-BATM, 1756-BATA, Series B: 1756-BA2
  • Current draw @ 5.1V DC:
    1200 mA
  • Current draw @ 24V DC:
    14 mA
  • Power dissipation:
    3.5 W
  • Thermal dissipation:
    11.9 BTU/hr
  • Isolation voltage:
    30V (continuous), basic insulation type, RS-232 to system, Type tested at 720V DC for 60 s
  • Serial cables:
    1756-CP3 or 1747-CP3, right angle connector to controller, straight to serial port, 3 m (9.84 ft)
  • Slot width:
    1
  • Module location:
    Chassis-based, any slot
  • Chassis:
    1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17
  • Power supply, standard:
    1756-PA72, 1756-PA75, 1756-PB72, 1756-PB75
  • Power supply, redundant:
    1756-PA75R, 1756-PB75R, 1756-PSCA2
  • Wire category:
    2 - on RS-232 port
  • North American temperature code:
    T4A
  • Enclosure type rating:
    None (open-style)
  • Temperature, operating:
    0…60 °C (32…140 °F)
  • Temperature, storage:
    -40…85 °C (-40…185 °F)
  • Relative humidity:
    5…95% noncondensing
  • Vibration:
    2 g @ 10…500 Hz
  • Weight:
    0.34 kg
  • Estimated shipping dimensions:
    3.5x14x15.1cm
  • Tariff Code:
    9019101000
  • 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 Specifications Installation Environment Application Scenarios

Features:

  • Provides 4 MB of user memory and 478 KB of I/O memory to accommodate extensive ControlLogix programs.
  • Supports optional 1784-CF128 nonvolatile memory, enabling battery-free operation and preservation of saved tag data.
  • Works with several ControlLogix chassis sizes and supports both standard and redundant power supply arrangements.
Allen-Bradley 1756-L62 is widely used in manufacturing, process control, and large automation systems where a high number of I/O points must be managed reliably. The controller can support up to 128,000 total I/O points, making it suitable for applications that require significant expansion capability. Its open-style construction allows installation inside industrial control cabinets. Compatibility with redundant power supplies also helps improve system availability.

The architecture of Allen-Bradley 1756-L62 combines memory capacity with communication flexibility. The controller contains 4 MB of user memory and 478 KB dedicated to I/O functions. RS-232 connectivity is available through 1756-CP3 or 1747-CP3 cables, while electrical isolation of the serial interface reaches 30 V continuous. Optional CompactFlash storage can provide nonvolatile memory functionality and reduce dependence on batteries.

Allen-Bradley 1756-L62 is intended for demanding environments where temperature, humidity, and vibration resistance are important considerations. The unit operates between 0 and 60 °C and tolerates noncondensing humidity levels up to 95%. Storage capability extends down to -40 °C and up to 85 °C. Documentation also describes SFC reset behavior in Programmatic Reset and Automatic Reset modes, allowing final scan execution and shutdown processing when configured accordingly.

The 1756-L62 Allen-Bradley ControlLogix 4 MB Memory Controller may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Allen-Bradley 1756-L62 ControlLogix 4 MB Memory Controller Manuals,Datasheets,Link 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.
Allen-Bradley 1756-L62 ControlLogix 4 MB Memory Controller Specs

General

  • Manufacturer Allen-Bradley
  • Model 1756-L62
  • Condition New Original ready stock
  • Product Family 1756-L61,1756-L63,1756-L64
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.
  • Must be inserted into any available slot in the ControlLogix rack.
  • After insertion, ensure that the locking clips at both ends of the module are fully closed.
  • Before first use, connect the internal lithium battery to prevent program loss.
  • Connect to a serial or industrial network via the front-end channel or communication module.
  • The ambient temperature during module operation must be maintained between 0 and 60 degrees Celsius.
  • Unused modules must not be stored in environments exceeding -40 to 85 degrees Celsius.
  • The relative humidity of the surrounding air should be maintained between 5% and 95% without condensation.
  • Possesses industrial-grade physical defense for stable operation under vibration interference across the entire 2G frequency band.
  • Suitable for systems requiring the handling of up to 128,000 analog or digital I/O points.
  • Perfectly suited for multi-axis servo collaborative motion control in packaging and high-precision machine tools.
  • Commonly used in large control networks requiring cross-workshop data exchange, such as in automotive assembly lines.
  • Widely deployed in critical dual-machine hot standby control systems in industries such as chemical manufacturing where downtime is not permitted.
Description
Allen-Bradley 1756-L62 belongs to the ControlLogix 5560 family and combines 4 MB of user memory with 478 KB of I/O memory to support complex control strategies. The controller can accommodate as many as 128,000 total I/O points, including up to 4,000 analog I/O channels, making it suitable for extensive process and machine control systems. Each controller is supplied with a battery and a 1747-KY key.

Optional nonvolatile memory is available through a 1784-CF64 or 1784-CF128 industrial CompactFlash card. When nonvolatile memory is installed, Allen-Bradley 1756-L62 can operate without a battery. In that configuration, current tag data remains in the state recorded when the nonvolatile memory was last saved, providing additional protection for application data.

Allen-Bradley 1756-L62 can be mounted in any slot of a 1756-A4, 1756-A7, 1756-A10, 1756-A13, or 1756-A17 chassis. Standard power supplies include 1756-PA72, 1756-PA75, 1756-PB72, and 1756-PB75, while redundant operation is supported by 1756-PA75R, 1756-PB75R, and 1756-PSCA2. The controller occupies one slot and communicates through an RS-232 interface using 1756-CP3 or 1747-CP3 serial cables.

Electrical characteristics include a current draw of 1200 mA at 5.1 V DC and 14 mA at 24 V DC. Power dissipation is rated at 3.5 W, with thermal dissipation reaching 11.9 BTU/hr. The RS-232 interface provides 30 V continuous isolation and has been type tested at 720 V DC for 60 seconds. The controller carries a North American temperature code of T4A and features an open-style enclosure.

Allen-Bradley 1756-L62 operates within temperatures from 0 to 60 °C and can be stored between -40 and 85 °C. Relative humidity ranges from 5 to 95% noncondensing, and vibration resistance reaches 2 g over the 10 to 500 Hz range. Documentation also notes that under specific SFC configurations, reset actions can cause target logic to execute a final scan, allowing timers to continue timing and logic to perform shutdown operations during Automatic Reset or Programmatic Reset modes.
Revisions

Revision Part #

Also known as

1756-L62 Ser A
1756-L62/A, Series A, Rev A
1756-L62 Ser B
1756-L62/B, Series B, Rev B
Alternative Names
1756L62 I756-L62 I756L62 1756-L61 1756-L63 1756-L63XT 1756-L64 1756-L65
Technical notes
The Allen-Bradley 1756-L62 ControlLogix processor maximizes industrial automation efficiency by delivering 4 MB of built-in user memory for seamless handling of complex data-intensive applications.
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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 memory capacity does Allen-Bradley 1756-L62 provide?
Allen-Bradley 1756-L62 includes 4 MB of user memory and 478 KB of I/O memory for ControlLogix applications requiring substantial program and data storage.
Why can Allen-Bradley 1756-L62 operate without a battery?
Installing a 1784-CF64 or 1784-CF128 industrial CompactFlash card gives Allen-Bradley 1756-L62 nonvolatile memory capability, allowing operation without a battery while preserving saved tag data.
How many I/O points can 1756-L62 support?
The controller handles up to 128,000 total I/O points and allows as many as 4,000 analog I/O channels.
Can 1756-L62 be installed in different chassis sizes?
Yes. 1756-L62 may be placed in any slot of 1756-A4, 1756-A7, 1756-A10, 1756-A13, and 1756-A17 chassis assemblies.