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Allen Bradley PLC 5 1771-LC5B

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1771-LC5B

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The 1771-LC5B module is designed as a single-loop process controller by Allen Bradley in the PLC 5 series. It operates at a supply voltage of 24 VDC and is capable of a backplane current load of 250 mA, making it suitable for various industrial applications.

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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 1771-LC5B

ManufacturerAllen Bradley
Product TypeSingle-Loop Process Module
Product LinePLC 5
Part Number1771-LC5B
Weight7.00 lbs (3.18 kg)
Supply Voltage24 VDC
Backplane Current Load250 mA
Signal Delay (AC)45 ms
Signal Delay (DC)50 ms
Communication InterfaceBlock Transfer (BTW/BTR) via the 1771 Backplane
Mounting TypeRack-mountable
Minimum Operating Temperature0°C
Maximum Operating Temperature60°C
Minimum Storage Temperature-40 °C
Maximum Storage Temperature85°C
Relative Humidity5 to 95% (Non-Condensing)
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The Allen Bradley 1771-LC5B is a specialized module intended for single-loop process application. This device operates at a supply voltage of 24 VDC and is engineered to handle a backplane current load of 250 mA efficiently. The module is equipped with communication capabilities, utilizing Block Transfer (BTW/BTR) through the dedicated 1771 backplane.

Signal delays are a key spec, with AC delays reaching 45 milliseconds while DC maintains a delay of 50 milliseconds, which may be critical for precise control in industrial settings. Its rack-mounted design makes installation straightforward and space-efficient within control panels.

Operational temperatures for the 1771-LC5B range from 0°C to 60°C, ensuring reliable functionality in typical environments. Additionally, it can withstand storage temperatures as low as -40°C, extending up to 85°C. For installation in humid conditions, this module can function within a relative humidity range of 5% to 95%, as long as condensation is absent. This flexibility permits use in diverse operational settings.