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Find the Right Serial Interface for Your Application

Plug-In Serial Families
  NI PCI-843x NI PXI-843x NI PCMCIA-xxx NI PCI-xxx NI PXI-842x NI AT-xxx
High-Performance DMA Engine        
Memory Mapped        
Flexible Baud Rates
(within 1%)
       
Max Transfer Rate(kb/s) 2000 2000 921.6 460.8 460.8 115.2
FIFO Size (B) 128 128 64 64 64 16
Hyperthreading
Multiprocessor Support
Compatible with 3.3 V PCI Slots          
RS485 Advanced Transceiver Modes
Isolation Option    
LabVIEW Real-Time Support      
Number of Ports
1          
2
4
8      
16        
Operating System
XP
2000
NT    
ME    
9x    
Serial Port
RS232
RS485/422

External Serial Families
  USB ENET
High-Performance DMA Engine    
Memory Mapped    
Flexible Baud Rates (within 1%)    
Max Transfer Rate (kb/s) 460.8 460.8
FIFO Size (B) 128 128
Hyperthreading
Multiprocessor Support
   
Compatible with 3.3 V PCI Slots    
RS485 Advanced Transceiver Modes
Isolation Option
LabVIEW Real-Time Support  
Number of Ports
1  
2
4
8    
16    
Operating System
XP
2000
NT  
ME    
9x    
Serial Port
RS232
RS485/422