Is it possible to connect DUT signals to fault and passthrough using the SET-2010 at the same time?

Issue Details

I am using the SET-2010 and SET-2310 in a HIL test system. I want to fault my DUT signals to a fault bus, while also have those signals passed through to my DAQ card through the RTI. Is it possible to configure the SLSC routing and faulting card to both passthrough and fault at the same time, as shown in this image? 

Solution

Yes, this is a possible configuration. The SET-2010/2310 will allow you to control the passthrough relays and faulting relays independently so that you can achieve both of those routes.

If you are using the VeriStand Routing and Faulting custom device, you could create the following connections in your routing channel table. This would connect J1Ch0p and J1Ch0n with both the Ch0p and Ch0n terminals on the RTI as well as faulting them to Fault Bus A and Fault Bus B, respectively:

• SLSC Chassis/Slot x (SLSC Switch)/J1Ch0p -> SLSC Chassis/Slot x (SLSC Switch)/XJ2Ch0p
• SLSC Chassis/Slot x (SLSC Switch)/J1Ch0n -> SLSC Chassis/Slot x (SLSC Switch)/XJ2Ch0n
• SLSC Chassis/Slot x (SLSC Switch)/J1Ch0p -> SLSC Chassis/Slot x (SLSC Switch)/Slot1_FaultNodeAC
• SLSC Chassis/Slot x (SLSC Switch)/J1Ch0n -> SLSC Chassis/Slot x (SLSC Switch)/Slot1_FaultNodeBD
• SLSC Chassis/Slot x (SLSC Switch)/Slot1_FaultSelect -> SLSC Chassis/Slot x (SLSC Switch)/Slot1_FaultA&B 

If you were controlling the individual relays using the SLSC Switch API, you could set the following relay states:

• Base_Ch0p = TRUE
• Base_Ch0n = TRUE
• Slot1_Ch0K0 = TRUE
• Slot1_Ch0K2 = TRUE
• Slot1_Ch0K1 = FALSE
• Slot1_Ch0K3 = TRUE
• Slot1_Ch0K4 = FALSE
  
• Slot1_CardK0 = TRUE
• Slot1_CardK1 = FALSE

Additional Information

In this configuration, you are connecting the the RTI-side lines (XJ2Chxp and XJ2Chxn) directly to the fault bus. This means that you must ensure the fault bus is within the voltage range of your DAQ or instrumentation channels. For example, most DAQ cards have an input range of +/- 10 V and will only be able to make valid measurements if the fault bus voltage is within this range. You must also ensure the fault bus is within the overvoltage protection range of the device to ensure damage does not occur.

When using the SET-2310, only one pair of fault bus lines (A+B or C+D can be used for all channels connected through that 2310 daughter card slot. This is because the CardK0 and CardK1 relays that control the connection to the fault buses are the same for all channels in the slot.