The FANUC A20B-8200-019 is an encoder feedback component listed in the industrial replacement market as a FANUC motor encoder / pulsecoder. In a compatible servo system, it detects motor rotation and supplies feedback used by the control equipment to regulate axis movement.

• 100% function tested before shipment
• Worldwide DHL, UPS and FedEx shipping
• Testing video provided upon request
• Contact us for current stock and lead time

Product Overview

Brand: FANUC
Part Number: A20B-8200-019
Alternative Format: A20B8200019
Component Category: Encoder / Pulsecoder
Main Role: Motor-rotation feedback
Application: Confirmed compatible FANUC motor and servo-control configurations
Product Family: A20B-8200
Availability: Please contact us
Core Exchange: Subject to confirmation
Repair Evaluation: Subject to confirmation
Testing: Checked for applicable encoder-feedback functions before dispatch

Encoder Role

The A20B-8200-019 encoder works within the motor feedback loop. Rotation detected by the encoder is communicated to the associated servo system, allowing the control equipment to monitor actual movement in relation to the commanded position or speed.

This model may be required when testing identifies defective encoder electronics, an intermittent feedback signal or connector damage. Similar symptoms can originate elsewhere, so technicians should also inspect the feedback cable, amplifier connection, power supply and control configuration.

Part-Number Clarification

The correct searchable model is A20B-8200-019, including its three-digit final group. Product records use this exact format, so an extra zero should not be added.

A20B-8200-019 and A20B-8200-0190 are different references. The A20B-8200-019 should also not be treated as interchangeable with A20B-8200-018, A20B-8200-025 or related-looking encoder numbers without supporting documentation.

Some search results associate additional markings with this encoder, but they are not consistent enough to advertise as official alternatives. Use every visible number on the original unit when confirming a replacement.

Technical Information Notice

Reliable public documentation does not establish the encoder resolution, absolute or incremental type, communication format, connector pinout, applicable motor series or direct supersession for A20B-8200-019.

These details are intentionally not stated as fixed specifications. Confirm them from the original encoder, complete motor nameplate, connector layout and machine-builder documentation.

Ordering Verification

Before purchasing, please provide or verify:

• Exact A20B-8200-019 marking
• Complete motor model and specification suffix
• Any revision or secondary identification number
• Encoder housing and mounting arrangement
• Connector style, orientation and pin count
• Feedback-cable number
• CNC and servo-amplifier models
• Current servo or pulse-coder alarms
• Clear front, back and connector photographs

Matching only the physical appearance is not sufficient. Similar FANUC encoder housings may contain different electronics, mounting arrangements or signal formats.

Installation Note

Disconnect machine power and follow approved safety procedures before removing the encoder. Encoder removal can affect the machine reference. After installation, the axis may require reference-position recovery, parameter verification or an absolute-position setup procedure, depending on the original configuration.

Installation and recommissioning should be completed by qualified personnel using applicable FANUC and machine-builder instructions.

REACO CNC Support

REACO CNC supplies tested FANUC A20B-8200-019 encoder components for replacement and maintenance applications. Identification support is available when customers provide photographs of the original encoder, motor nameplate and connector.

Every supplied unit is inspected and function tested before dispatch. Worldwide express shipping is available through DHL, UPS and FedEx, and a testing video can be provided upon request. Contact us for availability, quotation and lead-time information.