The A03B‑0815‑C001 I/O module is a 24/16 base connection panel I/O module (also known as a Branch‑connection I/O module / expansion module A) used in many Fanuc CNC and PLC‑style control panels. It routes signals between the main controller and connected devices such as sensors, switches, relays, and operator‑panel components, enabling accurate status monitoring and machine control in complex automation systems.
This Fanuc CNC I/O module integrates 24 digital inputs and 16 digital outputs on a single panel‑style module, with a 24/16 base connection that simplifies cable bundling and control‑cabinet layout. The unit includes multiple connectors (commonly JD1B, JD1A, CA101, JA3, and CB161) and can support a Multi‑Purpose Gate (MPG) interface on the operator panel side, making it suitable for both machine‑mounting and operator‑panel designs. The module also features overcurrent detection and temperature monitoring with self‑activating protection circuits that help prevent damage during abnormal conditions.
Physically, the A03B‑0815‑C001 is built as a compact, industrial‑grade I/O panel compatible with standard Fanuc control enclosures. It is designed for use in environments with typical industrial operating temperatures and is often supplied in tested condition (new or reconditioned) with a 12‑month warranty for new units and 3‑month for used. With a 3–7‑day lead time, it is a practical choice for CNC cabinet rebuilds, retrofits, and industrial control‑panel upgrades in food & beverage, pharmaceutical, energy, and general manufacturing applications.
