CNC Circuit Board

FANUC A20B-2901-0762 | 256K SRAM / 128K FROM Module with Analog Spindle — Series 20 / 21 CNC Part Number: A20B-2901-0762 Manufacturer: FANUC Ltd. (Japan) Product Type: Combined Memory and Spindle Module — SRAM + FROM + Analog Spindle Interface SRAM Capacity: 256K FROM Capacity: 128K Memory and Spindle in One Module The A20B-2901-0762 is a combined memory and spindle module for the FANUC Series 20/21 CNC. It integrates three functions on a single PCB: 256K SRAM — Battery

A20B-2902-0140 | FANUC A20B-2902 Series CNC Module PCB — Plug-In Daughter Board / CNC and Automation Systems / Japan Original A20B-2902 — FANUC's Plug-In Module PCB Family The A20B-2902 series is one of FANUC's most versatile PCB families — a collection of plug-in daughter boards that add or expand specific functions within FANUC CNC controllers. These boards are defined by their modularity: each installs into a dedicated socket or slot on the host board without requiring

A20B-1008-0640 | FANUC A20B-1008 Series CNC Power Supply PCB — Industrial Drive and Automation Board / CNC Replacement Spare A20B-1008 — Power Supply PCB Series for CNC Drive Systems The A20B-1008 series is FANUC's family of power supply and drive-related printed circuit boards for CNC and automation applications. These boards provide power conversion, power regulation, and associated power management functions within FANUC drive modules and CNC control hardware. The A20B

A20B-2100-0133 | FANUC A20B-2100 Series Drive PCB — CNC Servo and Spindle Drive Systems / Replacement Spare Part A20B-2100 — A Family of Drive-Focused PCBs The A20B-2100 series spans a range of printed circuit boards deployed within FANUC's servo amplifier modules, spindle amplifier modules, and power supply modules. Unlike the A20B-2101 series which focuses on control logic boards, the A20B-2100 series also covers power-stage PCBs — boards that operate in close proximity to

A20B-2001-0931 | FANUC Alpha Series SVM2 Two-Axis Servo Drive Control Board — Type-A Interface / SVM2-12/12 to SVM2-40/40 SVM2 Module Architecture — Two PCBs, One Housing The FANUC Alpha series SVM2 is a two-axis servo amplifier — one module driving two servo motors simultaneously. Inside the module, two PCBs work in combination: The wiring board (A16B-2202-xxxx / A16B-2203-xxxx): the passive connection layer. It carries the DC bus input, motor output power terminals, encoder

A20B-8101-0430 | FANUC A20B-8101 Series Power Supply PCB — 043x Range / CNC and Drive Power Board A20B-8101 — FANUC's CNC and Servo Amplifier Board Series The A20B-8101 series is a confirmed FANUC PCB family spanning main CPU boards and servo amplifier power boards across multiple CNC and robot system configurations. Examples confirmed in this session and from the broader A20B-8101 product range: Board Description A20B-8101-0280 Main CPU board (confirmed this session) A20B

A16B-2200-0201 | FANUC A16B-2200 Series PCB — 020x Robot and CNC Control Range / Industrial Automation Board A16B-2200-020x — Robot and CNC Control Board Zone Within the A16B-2200 series, the 020x range is confirmed by this session's research to include robot and CNC control boards. A16B-2200-0200 (immediately adjacent) as the "Main CPU PCB for RG2 Robot Control" — categorised under "Fanuc Robot Parts / Fanuc Robot PCB." The A16B-2200-0201 occupies the 0201 position —

A20B-2902-0020 | FANUC 4MB DRAM Module — Dynamic RAM Memory Expansion / CNC Working Memory / A20B-2902 Series SMD Board DRAM in CNC Systems — What It Actually Does The three types of memory in a FANUC CNC serve distinct purposes, and understanding the difference explains why a 4MB DRAM module matters: FROM (Flash ROM — non-volatile): Stores the CNC system software and long-term data. Non-volatile — retains content without power. Relatively slow for real-time access. SRAM

A20B-2901-0340 | FANUC Type A Servo Interface Control Module — Daughter Board / Type A Bus Interface / CNC Servo Drive Systems What Is the Type A Servo Interface? In FANUC's servo communication history, the Type A interface represents the serial servo bus protocol used on CNC generations that predate FSSB (Fibre Servo Serial Bus). Where FSSB uses optical fibre for completely noise-immune servo communication, the Type A interface uses dedicated serial cables between the CNC

A20B-2101-0012 | FANUC Beta βiSVPM2 Servo/Spindle Drive Board — A06B-6134 Series / Dual-Axis + 15kW SVSP / 0i-MC and 18/21i-B CNC A06B-6134 — One Unit, Three Drive Functions The FANUC A06B-6134 series Beta SVSP (Servo/Spindle Power) unit is an integrated drive designed for smaller CNC machine tools where space and cost efficiency matter. Three functions that would otherwise occupy three separate modules are combined in a single housing: Integrated DC bus power supply: The

A16B-2202-0420 | FANUC A16B-2202 Series PCB — 042x Control Board / CNC and Drive Automation Spare A16B-2202 — A Broad FANUC CNC and Drive Control Series The A16B-2202 series is one of FANUC's widest-ranging PCB families — confirmed throughout this session across main CPU boards, servo drive PCBs, power supply boards, and wiring boards for multiple CNC and drive generations. The A16B-2202-0420 at the 042x position occupies the lower range of this series: Range Confirmed

FANUC A20B-2100-0030 | Alpha Series Servo Drive Control PCB — FSSB / Type-A Interface The Control Layer Inside an Alpha Drive Module The A20B-2100-0030 is the control PCB from FANUC's A20B-2100 series — the front board that provides the control intelligence in an Alpha series servo or spindle amplifier module. Understanding what this board does, and what it does not do, is essential for correct fault diagnosis. A FANUC Alpha drive module is a two-layer assembly. The base

A20B-2002-0130 | FANUC CNC Controller Board — A20B-2002 Series / 013x PCB Circuit Assembly / CNC Control Spare A20B-2002 — FANUC's CNC and Drive Controller Board Series The A20B-2002 series is one of FANUC's most active PCB families — confirmed across this session to span CNC controller boards, servo drive PCBs, backplane boards, and BETA servo command boards across multiple CNC and drive generations. The A20B-2002-0130 at the 013x position occupies the early range of this

FANUC A20B-3900-0183 | 32 MB FROM + 512K SRAM Memory Module — Series 16i / 18i / 21i Model B CNC Two Memory Functions on One Module The A20B-3900-0183 is a plug-in daughter board that combines two distinct memory types in one module, serving different roles within the FANUC i-series CNC control: 32 MB FROM (Flash ROM): Non-volatile storage for the CNC operating software, PMC ladder program, part programme data, and servo parameter files. FROM contents persist without battery

FANUC A20B-3300-0392 | 4-Axis i-B Series Servo Module — FSSB Plug-In PCB for Series 16i / 18i / 21i Model B Part Number: A20B-3300-0392 Manufacturer: FANUC Ltd. (Japan) Product Type: 4-Axis i-B Series Servo Module — Plug-In PCB Four-Axis Servo Control on One Card The A20B-3300-0392 is FANUC's 4-axis FSSB servo module for the i-B Series CNC. It plugs into the 16i, 18i, or 21i Model B main board and extends the CNC's servo control capability to four axes via a single FSSB fibre

FANUC A16B-3200-0421 | i-B Series Stand-Alone Control Main CPU PCB — Series 16i / 18i / 21i Model B Part Number: A16B-3200-0421 Manufacturer: FANUC Ltd. (Japan) Product Type: Stand-Alone Control Main CPU PCB — i-B Series The Core of the i-B Series Control The A16B-3200-0421 is the main CPU PCB for FANUC's i-B Series standalone CNC control — the central board in 16i-B, 18i-B, and 21i-B systems around which the entire control is assembled. It is the physical carrier board onto

MC1169 | Industrial Automation Control Board — CNC and Machine Tool Automation Spare Part MC1169 — Industrial Control Board The MC1169 is an industrial control board serving CNC machine tool and automation system applications. Within the spectrum of industrial automation PCBs, control boards of this designation serve defined signal processing, interface, or control functions within the larger machine control architecture. Industrial control boards in this category typically

A16B-1212-0120 | FANUC Robot RG Control DI/DO I/O PCB — Digital Input/Output Interface Board / Robot Controller Spare DI/DO — The Language Between the Robot and Its World An industrial robot does not operate in isolation. It interacts constantly with the machines, fixtures, conveyors, and safety systems around it. Every one of those interactions is mediated by digital signals: Digital Inputs (DI): Signals arriving at the robot controller from the outside world — end-effector

A20B-3300-0084 | FANUC R-J3 Robot Controller CPU Card — 8MB SDRAM / Horizontal Mount / A16B-3200-0330 / A16B-3200-0331 R-J3 Robot Controller — What the CPU Card Does The FANUC R-J3 is a robot controller designed for FANUC industrial robots across a range of models and payloads. Inside the R-J3 cabinet, the main PCB (A16B-3200-0330 or A16B-3200-0331) hosts the controller's central processing and memory system. The A20B-3300-0084 CPU card is an option card that installs

FANUC A20B-2902-0501 | 8MB FROM + 256K SRAM Combined Memory Module — Series 16 / 18 / 21 CNC Part Number: A20B-2902-0501 Manufacturer: FANUC Corporation (Japan) Product Type: Combined FROM + SRAM Memory Module (SMD Daughter Board) Two Memory Types, Two Different Jobs The A20B-2902-0501 integrates two functionally distinct memory types on a single SMD daughter board, and understanding the difference between them is essential for correct maintenance and replacement decisions.