Product Description:

The E4809-045-084-C is a CNC control board manufactured by Okuma for the E4809 CNC Boards series. Installed on the backplane of OSP numerical controllers, it forms the central platform that links axis amplifiers, keyboard panels, and feedback sensors. By combining regulated power rails with interrupt-driven logic, the board oversees positioning calculations, alarm generation, and parameter storage required for automated metal-cutting operations. Locating these functions on one card shortens internal wiring, minimizes electrical noise, and keeps the control layout compact.

Primary supply for the assembly is 200/220 V AC, a range that matches the standard Okuma cabinet transformer and keeps auxiliary circuits within tolerance. Onboard regulation produces the +24 V control rail used for relays and opto-isolated inputs, while additional analog supply rails support the spindle supervision circuits. Core command execution is handled by a 16-bit microprocessor, a word width that supports position arithmetic and alarm logic without excess overhead. Visual fault feedback is delivered through a hexadecimal alarm display, so two-digit codes can be read without scrolling menus. When a code is latched, a bank of 4 dedicated alarm LEDs gives a quick hardware indication of the fault source before power is cycled.

The board interfaces with the machine harness through 7 connectors arranged along one edge, and each header separates axis feedback, I/O, and serial diagnostics. Parameter tuning is provided by 19 onboard variable resistors that allow adjustment of reference voltages and filter thresholds. For test measurement, 32 check terminals provide oscilloscope access to the rails and bus lines, and seven additional setting terminals allow jumper configuration of spindle options. Stable digital logic is maintained by a +5 V ±1% rail.