Product Description:

The OC950-601-01 option card is produced by Pacific Scientific for controllers in the OC950 Option Cards series. The module plugs into a compatible drive or positioning unit to add programmable digital inputs and outputs, nonvolatile parameter storage, and a selectable serial communications link to a host PLC or supervisory computer. By integrating these functions on a single board, the card streamlines machine wiring and simplifies field upgrades in industrial automation systems that need coordinated motion and status exchange.

It communicates through the RS-232/RS-485 interface and allows fixed baud selections of 19200 or 9600, matching common SCADA and HMI equipment. Each frame is built from a 10-bit data word that uses 1 start bit, 8 data bits, and 1 stop bit, so parity checking is unnecessary. Input recognition is consistent because the card accepts logic thresholds of 3.5 V high and 1.0 V low while maintaining 0.5 V to 1.5 V of hysteresis for noise immunity. All channels can operate from a field supply of 5 to 24 V, with 40 V as the absolute maximum, and signal transitions are filtered by an RC time constant of 100 microseconds. Configuration parameters and motion tables reside in a 32Kx8 NVRAM, and the hardware provides 21 bidirectional channels that can be reassigned as inputs or outputs.

I/O lines drive machine actuators through an open-drain DMOS transistor stage whose drain-to-source path measures 5 Ω typical and 9.5 Ω maximum at 125 °C, so heat dissipation stays low at elevated cabinet temperatures. The stage can sink 100 mA per channel, and a shared user supply delivers up to 200 mA maximum at 5 V ±5%, supporting indicator lamps or proximity sensor power. Long-term configuration storage is supported because the nonvolatile array retains its contents for 10 years without applied power.