OKUMA E4809-770-065-B | SVC II Type A Servo Amplifier Drive Board

Description

Core Product Summary (Brand / Model / Key Attributes)

The OKUMA E4809-770-065-B is an SVC II Board Type A servo amplifier drive board used in Okuma CNC servo-drive equipment. It functions as the control/top board for an Okuma BLII-D, also referenced as BL2-D, dual-axis servo amplifier, providing the servo-control electronics for axis drive operation.

This board is identified by the full order number E4809-770-065-B and the designation “SVC II Board Type A.” It is associated with Okuma BLII-D servo amplifier configurations, including dual-axis drive arrangements. Because it is a drive-level control PCB rather than a complete servo amplifier, replacement planning should confirm the installed BLII-D/BL2-D drive model, board revision, connector layout, and machine-specific configuration before installation.

Key Technical Specifications

Detailed Product Overview

The OKUMA E4809-770-065-B is a servo amplifier drive board for Okuma CNC motion-control hardware. It is specifically identified as an SVC II Board Type A and is used as the top/control board in an Okuma BLII-D, also written BL2-D, dual-axis servo amplifier.

In a BLII-D drive assembly, this board provides the servo-control section that works with the drive’s power stage to regulate axis motion. It is not a standalone servo drive: the E4809-770-065-B must be installed in the corresponding Okuma BLII-D/BL2-D amplifier assembly and configured consistently with the original drive and machine installation.

For procurement and maintenance, the exact suffix is important. The E4809-770-065-B is distinct from the related E4809-770-065-A revision, and published repair references describe the -B version as the top board for a BL2-D dual-axis drive. Physical similarity to other SVC-series boards does not establish interchangeability; the installed drive model, board marking, connector arrangement, and machine configuration should be checked before substitution.

Because this is a servo amplifier control board, safe handling requires the CNC cabinet to be de-energized and locked out before removal or installation. Electrostatic-discharge precautions, photographic records of jumpers, switches, connectors, and option settings, and verification against the original board are practical safeguards when replacing legacy drive electronics.

Engineering Selection Highlights

• SVC II Board Type A identification → The exact designation confirms that this is the servo amplifier drive board rather than a complete BLII-D servo amplifier unit.
• BLII-D / BL2-D drive association → The board is intended for use with Okuma BLII-D/BL2-D dual-axis servo amplifier configurations, so the installed drive family must match.
• Dual-axis top-board role → Its documented role as a top board for a BL2-D dual-axis drive means it should be evaluated as part of the complete amplifier assembly, not as an isolated axis controller.
• Exact -B suffix → The -B revision should be matched against the board currently installed in the drive; suffix differences can indicate a different board version.
• Drive-level replacement boundary → The board controls servo amplifier functions but does not replace the BLII-D power section, enclosure, cooling arrangement, or complete drive unit.

E4809-770-065-B

E4809-770-065-B

System Compatibility & Integration Requirements

Dimensions, Mounting & Connection Notes

• The E4809-770-065-B is a printed circuit board intended for installation within an OKUMA BLII-D/BL2-D servo amplifier assembly.
• Published product references identify it as a top board for a BL2-D dual-axis drive; it is not a standalone cabinet-mounted drive unit.
• Before removal, record the positions of connectors, jumpers, switches, and any option components on the original board.
• Use electrostatic-discharge protection and ensure the CNC drive cabinet is de-energized and locked out before handling the board.

FAQ

What is the OKUMA E4809-770-065-B?
It is an OKUMA SVC II Board Type A servo amplifier drive board used with BLII-D/BL2-D servo-drive hardware.

Which OKUMA drive family uses this board?
The board is associated with OKUMA BLII-D, also referenced as BL2-D, servo amplifiers.

Is the E4809-770-065-B a complete servo drive?
No. It is the servo amplifier drive/control board, specifically a top board for a BL2-D dual-axis drive, rather than a complete amplifier unit.

What does “SVC II Board Type A” mean?
It is OKUMA’s board designation for this servo amplifier control-board type within its SVC II drive-board family.

Does the -B suffix matter?
Yes. The full order number E4809-770-065-B identifies a specific board revision; it should be compared with the board installed in the drive.

Can this board be installed without checking the drive model?
No. The installed BLII-D/BL2-D drive model, board revision, connectors, and configuration should be confirmed before replacement.

Verification & Troubleshooting Notes

• Confirm the board’s silk-screened part number reads before treating it as a direct replacement.
• Compare the removed board’s revision, connector positions, jumpers, switches, and attached option components with the replacement before applying power.
• If an axis fault occurs after board replacement, distinguish between board-related symptoms and faults originating in the drive power stage, motor, encoder feedback, cabling, or machine-side wiring.
• Do not bypass interlocks, modify protective circuits, or perform unsupported firmware or memory-device changes during diagnosis.
• Keep the CNC cabinet de-energized and locked out during inspection or replacement, and use appropriate ESD handling procedures for the PCB.