|
| Place of Origin | JAPAN |
| Brand Name | FANUC |
| Certification | CE RoHS |
| Model Number | A17B-3300-0500 |
Part Number: A17B-3300-0500
Manufacturer: FANUC Ltd. (Japan)
Product Type: 8-Axis i Series Servo Control Module — PCB Assembly
The A17B-3300-0500 is an 8-axis i Series servo control module for FANUC Series 16i, 18i, and 21i CNC systems. It plugs into the mainboard or Sub-CPU board and manages servo axis control for up to eight controlled axes via the FSSB — FANUC's Fiber-optic Serial Servo Bus.
Each axis the CNC controls requires a servo module that translates the NC's position and velocity commands into real-time digital signals for the servo amplifiers. The A17B-3300-0500 handles up to eight axes simultaneously — velocity command generation, position feedback processing, and error compensation — in a single plug-in card. It communicates with the servo amplifiers over fibre-optic FSSB cables, using the TOSHIBA T0DX283 optical connector on the board.
Within the A17B-3300 series, both 6-axis and 8-axis variants exist. The 6-axis modules (A17B-3300-0101, -0103) are separate part numbers. The A17B-3300-0500 is specific to the 8-axis configuration. Confirming the axis count required before ordering is essential — the modules are not interchangeable.
FSSB (Fiber-optic Serial Servo Bus) is FANUC's high-speed digital communication bus between the CNC and its servo amplifiers. It replaced the analogue command interface of earlier FANUC platforms with a serial fibre-optic link, enabling higher axis count, faster update rates, and improved noise immunity.
On the A17B-3300-0500, each FSSB chain can connect multiple servo amplifiers in series. The CNC sends position and velocity commands over the bus every cycle; the amplifiers return actual position and current data. The board holds no servo parameter data — all parameters reside in the CNC's SRAM memory.
| Parameter | Value |
|---|---|
| Part Number | A17B-3300-0500 |
| Type | 8-Axis i Series Servo Module |
| Platform | Series 16i, 18i, 21i |
| Axis Count | Up to 8 |
| Interface | FSSB (Fibre-optic) |
| Connector | TOSHIBA T0DX283 |
| Mount | Mainboard / Sub-CPU board |
| Origin | Japan |
Q1: The CNC shows servo alarm 360-363 (FSSB communication error) on multiple axes simultaneously. Is the A17B-3300-0500 the likely cause?
FSSB alarms on multiple axes simultaneously point to the servo module rather than individual amplifiers. First re-seat the A17B-3300-0500 in its slot and check all FSSB fibre-optic cable connections at the board's optical connector. If alarms persist after re-seating and cable checks, the board's FSSB transmitter circuit has failed.
Q2: The CNC is a Series 16i with 6 controlled axes. Can the A17B-3300-0500 (8-axis) replace the existing 6-axis module?
The 8-axis module can be fitted in a 6-axis CNC — the unused axis channels simply remain unassigned. The FSSB topology is configured by CNC parameters, not the physical axis count of the module. Confirm the board physically fits the slot and that the CNC's FSSB parameter settings are correct for the connected amplifier chain.
Q3: Does replacing the A17B-3300-0500 require any parameter changes to the CNC?
The servo module itself holds no parameters. All FSSB topology, axis assignment, and servo gain parameters reside on the CNC's SRAM. After a like-for-like module replacement, the CNC reads its parameters normally. If the FSSB topology has changed (different amplifier chain), the FSSB initialisation parameters must be updated accordingly.
Q4: The FSSB fibre-optic cable was found kinked near the board connector. Should the cable be replaced before testing the new servo module?
Yes. A kinked or damaged fibre attenuates the optical signal and can produce FSSB communication errors identical to a failed servo module. Always replace damaged FSSB cables before or simultaneously with the servo module — fitting a new module on a degraded cable may not resolve the alarm.
Q5: The board was removed from a decommissioned Series 18i machine. Can it be used in a Series 16i?
The A17B-3300-0500 is used across Series 16i, 18i, and 21i platforms. Physical compatibility exists. However, the receiving CNC's FSSB parameters and axis configuration must match the board's connection setup. The board itself does not carry machine-specific data, so axis parameter reconfiguration is not required for the board — but the CNC's FSSB parameters must correctly describe the amplifier topology attached to the new board.
****Please firstly Contact us for its Availability, due to goods Vary. Thanks much!
PAYMENT INFO:
ESCROW / PAYPAL are only for the goods value 500$ or less.
Bank Transfer / Western Union are ok for any goods.
Handling charge ESCROW: 5-5.1%; Paypal: 3.9-4.4%
SHIPPING INFO:
*** Pls inform us, once you transfer payment by ny form, for us follow up in time.
*** Items are typically sent out 3-5 Working Days, after payment has been received.
Will ship worldwide (Please ask us first if you do not see an exact price for shipping for your country)
* FREE Shipping is not AVAILABLE for the buyers who are from some certain coutires DHL / Fedex are not avaiable for, Pls contact us for the detailed SHIPPING Cost.
Cross-border buyers are responsible for any CUSTOMS DUTY, TAX, etc. imposed by the buyer's home country.
************************************************************************************
PLEASE NOTIFY US WITHIN 10 DAYS, IF YOU HAVE NOT RECEIVED GOODS
&
PLEASE NOTIFY US AT THE SAME/ NEXT DAY, IF GOODS ARRIVE DAMAGED / NOT COMPLETE / NOT DESCRIBED
************************************************************************************
We DO COMBINE SHIPPING on multiple purchases!
Local Pickup Available
WARRANTY & RETURN:
** THREE Months WARRANTY for the Used goods**
** SIX Months WARRANTY for the New / Unused goods**
** Buyer Pays the Return Shipping Cost of Warranty **
*** We Accept RETURNS if goods arrive DAMAGED / NOT DESCRIBED / NOT COMPLETE.
*** We Accept RETURNS if goods are NOT WORKABLE in 4 Days After Goods Arrive.
.*** We do not offer Warranty, if after buyer collect goods, it become Physically Damaged or Improper Operated.
*** We do not accept RETURNS because the Wrong item was purchased or the buyer has changed their Mind.
***The Return goods must be in Original Same as we Sent with the Warranty Label On.
QUESTIONS
Please feel free to send us any question you may have, we are happy to answer!
Special arrangements will be made for bulk orders / pick-ups, please ask!
*If you do not see it listed, ASK US, we can list it for you!
BUSINESS HOURS
We are normally here between 9:00 A.M. and 5 P.M. Mon-Fri.
FEEDBACK
Feedback is left for buyers as soon as payment is received.
We ask that you leave us 5 star feedback once you get your item (s) in satisfactory condition.
If there is any problem, please notify us before you leave any feedback!
We always strive to resolve any issue.
Our customers are very important to us!
We Appreciate Your Business!!
Contact Us at Any Time
