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Allen Bradley PLC 3 1775-L1B55B

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1775-L1B55B

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The 1775-L1B55B model represents the main processor module from the Allen Bradley PLC 3 series. It is designed as a spare part that can be easily integrated into the system, requiring installation in the two leftmost slots of the chassis to function correctly.

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Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

Technical specifications for 1775-L1B55B

ManufacturerAllen Bradley
Product TypeMain Processor Module
Product LinePLC 3
Part Number1775-L1B55B
Weight3.00 lbs (1.36 kg)
Spare Part/AccessoryYes
Slot InstallationSupported
Required Slots2 Leftmost Slots on Chassis
Power SourceChassis Backplane
Backplane Current at 5V DC9.4 Amps at 5V DC
Backplane Current at 24V DC40 mA
I/O Image TableIncluded
LED Status IndicatorsIncluded
DiagnosticsSupported
Operating Temperature0 to 60 degrees Celsius
Storage Temperature-40 to 85 degrees Celsius
Relative Humidity5 to 95% without condensation
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The main processor module, Allen Bradley part number 1775-L1B55B, is a crucial component of the PLC 3 series. This unit is intended as a replacement and should occupy the two leftmost slots on the chassis for proper installation. It utilizes a power source from the chassis backplane. During operation, it requires a current of 9.4 Amps at 5V DC and consumes 40 mA at 24V DC.

To aid in control and monitoring, the module is equipped with an included I/O image table and LED status indicators that provide immediate feedback about its functioning state. Diagnostic functionality is also part of the package, allowing for troubleshooting and maintenance to enhance operational reliability.

This module is built to perform across a range of environments, with an operating temperature capable of sustaining from 0 up to 60 degrees Celsius. For its preservation, it can safely be stored between -40 and 85 degrees Celsius. Furthermore, it tolerates relative humidity levels ranging from 5% to 95%, as long as condensation is not present. Thus, the 1775-L1B55B processor module is engineered to provide dependable performance in various industrial conditions.

Revision Part #Also known as
1775-L1B55B Ser A1775-L1B55B/A, Series A, Rev A
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