NIKON C304 PCB Card Modules 4S015-173 NK-C304-40 4S015-205 C304-BT-31

Technical Dossier

Product Details And Specifications

NIKON C304 Series Technical Notes

The Evolution of C304 Architecture

The C304 board family was developed as part of NIKON's modular PCB control stack for its stepper and scanner platforms, succeeding earlier single-function analog control cards. The architecture transitioned from discrete analog signal processing to hybrid analog-digital designs, incorporating surface-mount components and FPGA-assisted logic for real-time axis feedback. Early C304 variants used through-hole construction with DIP ICs; later revisions (identifiable by the NK- prefix in part numbers) adopted SMD layouts with improved EMI shielding and tighter impedance control on high-frequency signal traces. The BT-31 suffix variants introduced enhanced bus termination circuitry to address signal integrity issues observed in high-density backplane configurations. Compatibility between early and late C304 revisions requires verification of backplane connector pinout and firmware revision alignment. As NIKON's lithography platforms have matured, the C304 series has entered a sustained maintenance phase — new production of these boards has ceased, making aftermarket sourcing and refurbishment the primary supply channel for end users maintaining legacy tool fleets.

NIKON C304 Full Catalog & Functionalities (SKU List)

The following SKUs represent confirmed members of the NIKON C304 PCB card family, organized by functional role within the control system:

Primary Assembly / Composite Modules

• 4S015-173: C304 series primary PCB card assembly, base board revision 173
• NK-C304-40: C304 control card, NK-series designation, revision 40 backplane interface
• 4S015-205: C304 series PCB card assembly, revision 205, updated signal routing
• C304-BT-31: C304 board with BT-31 bus termination module, backplane signal integrity variant
• 4S015-100: C304 base PCB card, early production revision, through-hole construction
• 4S015-120: C304 PCB card, intermediate revision, mixed SMD/through-hole layout
• 4S015-150: C304 PCB card assembly, pre-NK series, analog signal conditioning stage
• NK-C304-10: NK-series C304 card, revision 10, initial SMD transition variant
• NK-C304-20: NK-series C304 card, revision 20, improved EMI shielding layer
• NK-C304-30: NK-series C304 card, revision 30, FPGA logic update, axis feedback enhancement

Bus Termination & Signal Interface Variants

• C304-BT-10: C304 board, BT-10 bus termination, early backplane termination standard
• C304-BT-20: C304 board, BT-20 termination, mid-series impedance control revision
• C304-BT-31: C304 board, BT-31 termination, final production bus integrity variant
• 4S015-205-BT: Composite assembly combining 4S015-205 PCB with BT-series termination daughterboard

Functional Sub-Assemblies

• NK-C304-40-SUB: Sub-assembly board for NK-C304-40, servo signal conditioning daughtercard
• 4S015-173-A: Variant A of 4S015-173, alternate component sourcing revision for extended production run

Quality Control for the C304 Range

NIKON C304 PCB cards present specific testing challenges due to their proprietary backplane interface and multi-layer signal routing. DriveKNMS applies the following quality control protocol to all C304 units processed: