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National Instruments 777641-02 Serial Interface Card

Part number 777641-02 from National Instruments is the identifying part number for the PCI-485 Serial interface card. This card is designed for high-speed serial communication with industrial modules while relying on the RS-485 communication protocol. Since this module is intended for multiport connections, the RS-485 is a great choice for communicating with multiple devices over a long distance without affecting the data transfer quality. 

The differential signaling capability due to the RS-485 protocol helps minimize noise and signal degradation in the 777641-02 Serial interface card. This interface card features 8 communication ports that users can configure individually adjusting the communication or data transfer speeds. This card features the UART with deep FIFOs, which allows it to efficiently handle high data rates and reduce CPU overhead. The UARTs are capable of supporting baud rates up to 1 Mbps, allowing for fast data transfers. This module also includes hardware and software flow control to manage data flow and prevent buffer overruns.

The 777641-02 module draws power from the PCI bus requiring 1.1 Amperes at +5 Volts DC but can draw up to 2.0 Amperes at maximum load allowing it to operate efficiently within the power constraints of standard PCI slots. The module has a compact design with dimensions of 10.67 cm by 14.48 cm allowing it to fit in perfectly into a standard PCI slot. The card uses a 68-position SCSI-type connector for its I/O interface which is converted to eight DB-9 connectors via an included cable enabling easy integration into existing systems and simplifying connectivity to various serial devices.

The 777641-02 serial communication card provides data line ESD protection to prevent static shock from affecting the data communication lines. The module however does not feature an Ingress Protection which can help it to operate in environments with extreme conditions. It is recommended by the manufacturer to operate this module in an environment with an ambient temperature between 0 degrees Celsius to 55 degrees Celsius. Keeping this module cool is important as during high-speed communication it may overheat which might affect the performance of the device.