FANUCA16B-1212-0430Separate Detector Adapter PCB, Series 15 CNC External Position Feedback Interface, Rev 01A

Product Description

What this part is

A Fanuc A16B-1212-0430 Separate Detector Adapter printed circuit board. Its job is position feedback interfacing: it accepts signals from detectors mounted away from the servo motor — linear scales, separate rotary encoders, external pulse coders, magnetic sensors — and presents them to a Fanuc Series 15 CNC as usable axis position data.

Decoding the order code

A16B: Fanuc drawing prefix for a large printed circuit board assembly. A20B is the prefix Fanuc uses for smaller boards and daughter cards, and A86L is reserved for bought-in components. 1212: drawing group within the A16B family. 0430: the specific board. 01A: revision level of that drawing, marked on the board itself. Fanuc revisions are generally interchangeable for the same base number unless a service bulletin says otherwise.

Why separate detector feedback exists

Most Fanuc axes run semi-closed loop: the encoder is inside the servo motor, so the control measures the motor. A fully closed loop puts a scale or a separate encoder on the moving member itself and measures where the table really is. The separate detector adapter is the hardware that makes that second, external feedback path possible, so a machine can hold position over a long axis and through a shift’s worth of thermal drift.

Published specifications

Function: separate detector adapter / external position feedback interface. Platform: Fanuc Series 15 CNC control units. Fanuc drawing number: A16B-1212-0430. Revision marked: 01A. Form factor: card-rack printed circuit board assembly, seats in the CNC control unit rack. Country of manufacture: Japan.

Mounting data

The board seats in a slot in the Fanuc Series 15 CNC control unit rack. Detector type, resolution, feedback direction and closed-loop enable are all parameter-driven on a Series 15, so the axis parameters govern the detector actually fitted.

Quantity and configuration

One printed circuit board.

Interchange guidance

The full drawing number is the ordering reference. The neighbouring A16B-1212 boards are different functions on the same platform. A16B-2200-0430 is a different drawing family. Also written A16B12120430, A16B 1212 0430, A16B-1212-0430/01A and A16B-1212-0430#01A.