A16B-2200-0391 Fanuc PCB Board A16B22000391 AI6B-22OO-O39I

A16B-2200-0391 | FANUC Series 0-C 2-Axis Serial Pulse Coder Axis Card — PULCO / Type A / Alpha Servo Interface / OT-C/D/F

PULCO — Serial Pulse Coder on the Series 0-C Platform

The A16B-2200-0391 carries the "PULCO" designation — a condensed notation for Pulse Coder, identifying the encoder interface type. This places it in the most advanced axis card tier for the Series 0-C platform.

KFAS LLC's Series 0-C hardware table confirms the axis card evolution:

The A16B-2200-0391 is the serial Pulse Coder generation for 2-axis configurations — the most capable axis card in the 0-C family for 2-axis machines.

Key Specifications

Serial Pulse Coder — The Advanced Encoder Interface

CNC Electronics confirms: "this axis type A servo interfaces for ALPHA series servo amplifiers." The Alpha series introduced serial pulse coder motors to production CNC machines.

Serial Pulse Coder transmits position data as a serial digital message — replacing parallel signal wires of older encoder types. This delivers higher resolution and cleaner signal transmission compared to the analogue or 16-bit parallel interfaces of earlier axis cards.

"Type A" identifies the servo communication protocol connecting to Alpha series servo drives — a pre-FSSB (pre-fibre optic) interface standard.

Application Scenarios

Series 0-C CNC lathe 2-axis fault: A FANUC Series 0-C CNC lathe's Z and X axes develop serial pulse coder alarms. A16B-2200-0391 is identified. Replacement restores 2-axis serial position feedback.

0-C drive modernisation upgrade: A Series 0-C CNC using an older axis card (A16B-2200-0221) is upgraded to A16B-2200-0391 when Alpha servo drives are installed.

FAQ

Q1: What is the difference between A16B-2200-0391 (PULCO) and A16B-2200-0361 (32-bit axis card)?

Both serve 2-axis configurations on Series 0-C CNC. A16B-2200-0361 uses a 32-bit interface to earlier-generation encoders. A16B-2200-0391 uses the Serial Pulse Coder interface specific to Alpha series servo motors. The two are matched to different servo drive generations and are not interchangeable.

Q2: Does A16B-2200-0391 serve only 2-axis machines?

A16B-2200-0391 is configured for 1 or 2 axes. CNC Electronics describes it as a "1 to 2 serial axis board." For 3/4 axis machines using Serial Pulse Coder, the corresponding board is A16B-2200-0390.

Q3: What does OT-C, OT-D, OT-F spindle compatibility mean?

These are the spindle control module types available for Series 0-C. CNC Electronics confirms A16B-2200-0391 "was designed to run with any OT-C / OT-D / OT-F spindle and servo interfaces including digital, serial and rarely analogue configurations."

Q4: Does replacing A16B-2200-0391 require servo parameter re-entry?

No. Servo parameters reside in the CNC's main SRAM. After fitting the replacement, the CNC re-applies parameters automatically. Verify correct servo response on both axes before returning to production.