Description
🔎 FANUC A06B‑6127‑C257 – What It Is
A06B‑6127‑C257 is not a separate replaceable hardware part — it’s a unit specification / internal designation code used in FANUC technical documentation (such as service manuals and parts lists). It refers to the internal wiring/assembly configuration of a specific FANUC servo amplifier module in the A06B‑6127 series.
✔️ In FANUC naming conventions:
- “H‑codes” (like A06B‑6127‑H257) are the actual physical amplifier modules you install or replace.
- “C‑codes” (like A06B‑6127‑C257) are the internal unit specification codes that appear in manuals to identify wiring, board layout, and assembly details for the corresponding H module.
👉 So:
📌 A06B‑6127‑C257 = the internal unit specification code for the servo amplifier module whose order part number is A06B‑6127‑H257.
🧩 What the Corresponding Amplifier Is
The matching H‑part for C257 is:
A06B‑6127‑H257
- A dual‑axis high‑voltage servo amplifier module in FANUC’s αiSV (Alpha i Servo) family.
- Typically described as an AiSV‑40/40HVL unit — meaning it drives two axes with equal medium‑power capacity.
- Commonly used to control two servo motors in CNC machines for precise position, speed, and torque control.
This amplifier:
- Converts AC mains power into controlled output for servo motors
- Interfaces with the CNC controller via FANUC’s serial servo bus (FSSB)
- Is used in CNC machining centers, lathes, and automated motion systems
Unlike the C‑code, the H‑code corresponds to the actual module you would order or replace.
🧠Why FANUC Uses “C” and “H” Codes
FANUC part numbering often has two parallel codes:
-
H‑codes (Order Spec):
→ Used for purchasing, replacement, and inventory (e.g., H257). -
C‑codes (Unit/Wiring Spec):
→ Used in service manuals, wiring diagrams, and parts breakdowns to specify internal configuration (e.g., C257).
Both refer to the same underlying hardware, but from different documentation contexts.
âś… Summary
A06B‑6127‑C257
➡️ Internal unit/wiring spec code in FANUC documentation
➡️ Corresponds to A06B‑6127‑H257 — the dual‑axis FANUC servo amplifier (AiSV‑40/40HVL)
➡️ Used in CNC machines for dual‑axis motion control