Product Description:

The E4809-770-032-3 is a relay interface card manufactured by Okuma for the E4809 CNC Boards series. Installed in the electrical enclosure of an Okuma numerical control, the board routes low-level logic signals to field devices through electromechanical relays, allowing machine functions such as coolant valves or spindle interlocks to be switched in sync with internal commands. By separating control logic from power wiring, it helps maintain reliable automation cycles on machining equipment. This arrangement also isolates command electronics from higher-current switching paths, which helps reduce interference at the control level.

The board is internally labeled as Relay Board I, which identifies the card within the control rack. Hardware revision TPB-H V0 indicates the board layout revision used on this unit. Its form factor is a standard PCB with edge connectors that slide into a guided backplane, minimizing installation time. That edge-connector format also helps keep the card aligned with the mating backplane during insertion. Three discrete output channels give the module a 3-port capacity for independent relay groups. Each channel has an LED indicator that lights when its corresponding relay coil is energized, allowing quick visual confirmation during troubleshooting.

Variant code RU-1 identifies the contact arrangement used on this board, supporting compatibility with the assigned wiring harness. The jumper blocks are set to a Customer Specific configuration, so pull-up or pull-down logic can be tailored without soldering changes. This layout supports machine-specific signal behavior without altering the base card design. The assembly weighs 1.85 lb, which helps the board stay firmly seated under machine vibration while remaining easy to handle during installation. The board follows interface conventions used by Okuma, matching the control platform for which it was designed.