Product Description:

Manufactured by Okuma, the BLII-D100A belongs to the BL Servo Drives series and functions as the power interface between a CNC controller and a brushless servo motor on a single machine axis. In industrial automation, this drive supplies regulated current to the motor windings, executes velocity commands, and issues alarms when load or line conditions move outside acceptable limits. Its single-axis layout makes it suitable for machines that assign one dedicated drive to each servo axis.

The main output stage is rated for an amplifier capacity of 100 A, allowing high instantaneous torque production on heavy-duty moves. Motion is limited to one mechanical line because the internal SVCII control board supports a single-axis count of 1. Command logic is powered through a control circuit that operates on 100 V single-phase, while the power section accepts a 200 V three-phase supply on R/S/T terminals and routes motor current through U1, V1, and W1. If phase current rises to 150% of limit current, the overcurrent alarm is triggered and the drive disables the output. Control power is wired to dedicated AC1 and AC2 points so the logic supply can be isolated from the main bus during service.

Continuous duty is allowed up to 75% RH ambient moisture, and short surges may reach 95% RH without condensation. The chassis endures installation vibration of 0.5 G, helping board connectors and power devices remain secure during machine operation. A differential tachometer port provides a speed-monitor signal of ±10 V / ±3750 rpm for external meters or oscilloscope diagnostics, confirming that commanded velocity matches actual shaft speed. Internal logic integrity is verified by a control-check rail of 5 V, enabling the host controller to detect supply dips before motion errors occur. The separated monitoring signals also support routine troubleshooting without disturbing the motor power wiring. These characteristics help maintain stable servo performance in changing temperature and humidity conditions.