Product Description:

The 105-641003 is a motion control card from Pacific Scientific, positioned within the 105 Motion Control Cards series and intended for axis control tasks in industrial automation racks. Installed on a backplane, the board converts position commands into motor phase currents so that stepper motors or brushless servomotors follow programmed trajectories. Its rack-mounted format allows the control hardware to be integrated into multi-axis systems where coordinated motion and compact packaging are required.

The card accepts a supply between 24 Vdc and 75 Vdc. This range lets it share power with low-voltage plant buses while staying below the internal bus overvoltage trip of 83 Vdc. At the output stage, it can deliver up to 5.0 A RMS continuously, with transient bursts reaching 7.1 A peak for acceleration or disturbance recovery. Position data are clocked through the step generator at a maximum rate of 2.0 MHz, permitting fine microstep resolution when paired with suitable drives. Input current is reduced automatically during dwell intervals to limit heat rise and reduce supply loading. The electronics remain functional from 0 °C to 50 °C, and an overtemperature sensor inhibits operation if chassis temperature approaches the 60 °C limit. When power is removed, storage is allowed between −55 °C and 70 °C without component degradation.

Idle current reduction of 50% lowers thermal stress, helping the compact board shed heat through convection inside the cabinet. The unit has a depth of 4.3 in, along with a width of 1.5 in and a height of 5.0 in, so multiple axes can be stacked in a modest enclosure. The assembly weighs 1 lb, which keeps the load low for compact mounting arrangements. Adequate airflow must be provided so that the metalwork never exceeds a chassis temperature of 60 °C. This operating limit helps protect the card during continuous motion sequences generated at the full rated step frequency.