National Instruments PXI-8422

The NI PXI-8422 modules are asynchronous RS232 interfaces with 2000 V of optical isolation and available with two or four ports. NI PXI-8420 modules are asynchronous RS232 interfaces available with up to 16 ports. The legacy PXI modules have been replaced by the NI PXI-843x next-generation serial interfaces, which offer increased performance and functionality at the same price as the legacy modules. Use the NI legacy PXI modules, which are available in 2-, 4-, 8-, and 16-port versions, only with Windows Me/9x/NT and LabVIEW Real-Time.