Product Description:

The E4809-770-015-B is a DC power-supply supervision board manufactured by Okuma for the E4809 CNC Boards series. It installs inside the electrical enclosure of an Okuma machining center and mediates between incoming mains, the shared DC bus, and individual servo sections. By regulating auxiliary voltages, monitoring bus levels, and forwarding status data to the numerical control, the board supports coordinated axis motion in automated machining applications.

Incoming energy reaches the board on a single-phase feeder rated at 220 VAC, which is rectified to a stabilized reference of 300 VDC for the common bus. From this potential, the circuit generates control supply rails of +/-15 VDC, 5 VDC that power analog comparators, logic devices, and encoder interfaces. The design aligns with Okuma drive shelves that handle 30 A, 50 A, 75 A servopack modules connected to BL, BL-H, and BL-MS motor families. Isolation gaps and thick copper pours moderate thermal rise so voltage regulation remains within tolerance during rapid axis acceleration.

The diagnostic architecture is built around 10 dip-switch groups that set board identity and drive capacity. SW1 and SW2 must remain identical, the U/V pairs of SW3U and SW3V as well as SW4U and SW4V keep phase sensing symmetrical, and SW6 is fixed at position 5. A separate map on SW7 assigns code 1, 2, or 3 to the three current classes, while the HV monitor triggers at 430 VDC to shut down charging contactors. Two visual layers assist troubleshooting: the power section exposes 2 DCPS status LEDs, and the servo monitor provides 10 alarm LEDs with a 1-green, 2-yellow, and 7-red distribution that helps pinpoint the fault origin. When correctly configured, the board can supervise 6 axes from a single DC supply section so amplifiers trip simultaneously under over-voltage or phase-loss conditions.