The differential PXI fault-insertion switch
(Model 40-200) is designed for lower data rate serial interfaces such as CAN and FlexRay, and the high bandwidth differential PXI fault insertion switch
(Model 40-201) is designed for higher data-rate serial interfaces such as AFDX and 1000BaseT Ethernet.
Pickering Interfaces makes a range of PXI Fault Insertion Switch Modules for just this purpose.
The Model 40-190B 2A Fault Insertion Switch is intended for automotive and avionic applications and available with 32, 64, or 74 fault insertion channels and one or two fault buses.