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National Instruments 781632-01 C-Series Synchronization Module

The part number 781632-01 from National Instruments is the identifying part number for the NI-9467 C-Series Synchronization Module. The 781632-01 is a GPS synchronization module designed for use in CompactRIO, CompactDAQ, Single-Board RIO, and EtherCAT systems. This module uses the L1 frequency and GPS C/A code for gathering GPS location and real time location data.

The 781632-01 Synchronization Module operates with a signal type of L1 frequency and GPS C/A code, referencing the WGS-84 datum. The RF GPS signal frequency is set at 1575.42 MHz. For optimal performance, it is recommended to ensure the GPS antenna has a clear view of the sky, as this will significantly enhance timing accuracy. The module is designed to handle recommended signal strengths at the SMA connector between -135 dBm and -120 dBm, with a maximum RF power input of 3 dBm and an input impedance of 50 Ω.

The module features an SMA female connector for the GPS antenna and provides a DC voltage output of +5 Volts with an accuracy of ± 10 % for active antennas, with a maximum current output of 30 mA. The minimum current required for antenna presence detection is 6 mA typical and 9.5 mA maximum. The module includes over-voltage protection of ± 30 Volts DC, to protect the internal electronics of the module. The 781632-01 Synchronization Module has a Pulse Per Second accuracy of ±100 nanoseconds, with a typical accuracy of over 99 %. 

The 781632-01 Synchronization Module is designed to operate within a wide temperature range of -40 °C to 70 °C and can be stored at temperatures ranging from -40 °C to 85 °C. It supports operating humidity levels of 10 % RH to 90 % RH, non-condensing, and storage humidity levels of 5 % RH to 95 % RH, non-condensing. The module has an ingress protection rating of IP 40 and is rated for Pollution Degree 2 environments. It can operate at altitudes up to 5,000 meters. It consumes power from the chassis, with a maximum of 150 mA in active mode and 1 mA in sleep mode.