National Instruments 781963-01 C Series LIN Interface Module

Part Number 781963-01 is the identifying part number for the National Instruments NI-9866 C Series LIN Interface Module. The module consists of a 9-pin male D-sub connector that provides a connection to a LIN bus. The port has two COM pins that serve as the ground reference for the LIN signal. Likewise, the port also has a SHLD pin, that allows you to connect to a shielded LIN cable. This is particularly useful when you want better signal integrity and EMC performance while working in a noisy environment.

The 781963-01 requires an external supply voltage of +8V to +18V, which is provided through the Vsup pin from the LIN bus. Likewise, the power consumption for the module is 1 W max. in active mode while the thermal dissipation at 70°C is 1.25 W max. For safety considerations, keep in mind that the maximum voltage between the port and the COM must be within ± 40 VDC. 

The cabling specifications for the 781963-01 state that the LIN cables should meet the requirement of a bus RC time constant of 5 µs. Therefore, Belden cable (3084A) and other unterminated CAN/Serial quality cables are suitable for such applications. Likewise, the maximum allowed cable length is 40m and the maximum number of devices on a LIN bus is 16. 

The LIN port on the 781963-01 is isolated from the other modules in the system. The port also contains an NXP TJA1028 LIN transceiver that supports a maximum baud rate of 20 kbps. Both the LIN controller and the transceiver are compatible with the LIN 1.3/2.0/2.1/2.2 specifications. 

The 781963-01 weighs 5 g (approx.) and is recommended for indoor use only. The operating temperature for the module is -40° to 70°C and the operating relative humidity is 10% to 90%. On the other hand, the module is to be stored at a temperature range of -40° to 85°C at a relative humidity of 5% to 95%. Furthermore, the recommended maximum altitude for the operation of the module is 2000m.