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  • 1771-AF
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Other Automation PLC-5

SKU 0  UPC 00

Fiber-Optic Converter Module

Troubleshooting and Product Information for 1771-AF

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Other Automation
PLC-5 1771-AF
Weight: 2 Lbs
Dimensions: 10"x12"x2"In
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Weight: 2 Lbs
Dimensions: 10"x12"x2"In
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Other 1771-AF

Available Revisions:

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1771-AF , CIM1771-AF


The Allen-Bradley 1771-AF is a Fiber-Optic converter module. The module converts electrical signals (twinaxial) to optical signals for transmission over the fiber optic cable. When the fiber-optic signals reach the destination, the 1771-AF converts them back to their original electrical signals. The module is made to be mounted on the 1771 I/O chassis where it is allocated a single slot. The module consumes a current of 600mA at 5V DC from the backplane. When in operation, the 1771-AF has a heat dissipation rating of 3W.


Through its point-to-point configuration, the 1771-AF can transmit signals over a distance of 6562 feet when using a fiber-optic cable with a rating of 100/140µm. To achieve a longer transmission distance of close to 43,000 feet, a 100/140µm fiber-optic cable should be combined with the twinaxial cable. The 1771-AF must be stored at temperatures between -40 and 85 degrees Celsius and operated at temperatures between 0 and 60 degrees Celsius. The humidity rating for the 1771-AF is 5-95% without condensation.


The 1771-AF has an optical receiver sensitivity of -24dBm at a distance of 3 feet on 100/140µm cable. It has an 820nm optical wavelength. To connect the 1771-AF, an SMA-905 fiber-optic cable connector is required. The module requires a minimum bandwidth of 17MHz per kilometer. The 1771-AF has cable loss guidelines which were specified during manufacture and which must not exceed 1dB. The module has a transmitter power (optical) of -21dBm at a 3-foot distance on the 50/125um fiber-optic cable or a -16.1dBm on the 62.5/125µm fiber-optic cable. The optical transmitter power reaches a minimum of -5.6dBm for every 3 feet when using the 200/230µm fiber-optic cable.

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What is New Surplus?

These “New Surplus” units are a great cost saving alternative. This product is sealed in the original manufacturer’s packaging with all sub-assemblies and documentation. May indicate older date code. Comes with a PDF Supply 3-year warranty.

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What is Surplus New?

Surplus New - New unused and includes all sub-assemblies and documentation. Product may ship in manufacturer or PDF Supply packaging. May indicate older date code. Includes a PDF Supply 3 Year Warranty.

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What is Reconditioned?

Reconditioned products from PDF Supply are a cost-effective alternative to new and obsoleted PLC products. Every part is reconditioned down to the circuit board level and updated to the latest revision. All parts are thoroughly inspected and hand-cleaned before being functionally tested in a fully configured system.

Our Reconditioned Products always come with a PDF Supply 2-Year Warranty.

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What is a Verified Substitute?

A verified substitute new product is a "drop in" replacement designed with identical specifications as the OEM product. It will meet all electrical and dimensional charactertics at a substanstially reduced price.

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