Product Description:

The OC950-602-01 is an option card produced by Pacific Scientific for the OC950 Option Cards series. Installed in Pacific Scientific motion controllers, it expands local intelligence by adding nonvolatile memory and general-purpose digital I/O. This lets a machine store parameters, retain operating data after power loss, and exchange status bits with external sensors, actuators, or higher-level networks without separate interface boards. The card is suited for control applications that need local data retention and simple discrete interfacing in one module.

The card carries 128k x 8 NVRAM that is battery-backed, giving nonvolatile storage for recipes and fault logs while supporting frequent updates. It operates from a logic rail of 5 V ±5%, simplifying power distribution inside the controller rack. Each output channel uses an open-drain DMOS transistor and can sink up to 100 mA, which is enough to drive LEDs, relays, or optocouplers directly. Digital state detection is precise because the input switches low when voltage drops below 1.0 V, and it switches high after the level exceeds 3.5 V. A 10 kΩ pull-up to +12 VDC is already on the board, so no external bias resistors are required.

Data retention lasts up to 10 years even when system power is removed. For analog filtering, the onboard RC network provides a 100 µs time constant that suppresses contact bounce without adding noticeable latency to control signals. A total of 21 bidirectional channels can be configured individually as inputs or outputs, and the auxiliary supply rail can deliver up to 200 mA to external devices. Serial diagnostics are available through a 9-contact female D-sub connector that streams 10-bit words with 1 start bit, 8 data bits, and 1 stop bit with no parity, allowing simple connection to terminals or PCs for parameter upload and event monitoring.