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Allen Bradley 1771-WHFB High-Speed Counter Module

Allen Bradley 1771-WHFB 4-channel high-speed counter module.

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ManufacturerAllen Bradley

Part number1771-WHFB

Number of Channels 4

Max Count Rate 10 kHz per channel

Input Type Pulse Input

Compatible PLC Systems PLC-2, PLC-3, PLC-5

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12-month warranty

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Veteran-owned

CAGE: 9NK75

Four high-speed counter channels Up to 10 kHz counting speed Compatible with PLC-2, PLC-3, PLC-5 1771 I/O chassis compatible Reliable pulse counting

Product description

The Allen Bradley 1771-WHFB is a high-speed counter module designed for use in the 1771 I/O chassis, compatible with PLC-2, PLC-3, and PLC-5 programmable logic controllers. This module provides four independent counter channels, each capable of operating at speeds up to 10 kHz.

This module is essential for applications requiring precise counting of fast events, such as pulse trains from encoders, production line item counting, or speed monitoring. Industries like packaging, material handling, and automotive manufacturing benefit from its high-speed counting capabilities.

Stanlo Automation, a veteran-owned distributor of surplus industrial automation parts, carries the Allen Bradley 1771-WHFB. Secure reliable components for your legacy PLC systems with our quality surplus inventory.

Technical specifications

Number of Channels	4
Max Count Rate	10 kHz per channel
Input Type	Pulse Input
Compatible PLC Systems	PLC-2, PLC-3, PLC-5
I/O Chassis	1771
Manufacturer	Allen Bradley

Common applications

Encoder feedback

Production counting

Speed measurement

Event logging

Motion control feedback

Compatible systems

Allen Bradley PLC-2, PLC-3, PLC-5 controllers with 1771 I/O chassis

Also known as

Allen Bradley 1771 WHFB 1771 series counter module High speed counter 1771-WHFB

Replaces / compatible with

This module is a standard component for 1771 I/O chassis and is compatible with PLC-2, PLC-3, and PLC-5 controllers. It is not a direct replacement for modules in other series.

Technical note

Expert tip

This module requires a specific configuration within the PLC program to define input modes and counter functions for each channel.

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Frequently asked questions

What is the maximum counting frequency for each channel on the Allen Bradley 1771-WHFB module?

Each of the four channels on the Allen Bradley 1771-WHFB high-speed counter module can operate at a maximum counting frequency of 10 kHz. This allows for accurate tracking of fast-occurring events and signals.