National Instruments PCI-6534 high-speed digital I/O card. Tested, fully functional, and in excellent physical condition.

Each NI 653X provides 32 digital data lines that are individually configurable as input or output, grouped into four 8-bit ports. Each line can sink or source 24 mA of current. In addition to controlling and monitoring relay-type applications, the NI 653X also provides two timing/handshaking controllers for high-speed data transfer.

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