The description for the - Sense (negative sense) pin of the PTH08T240 power module states that "For optimal voltage accuracy -Sense must be connected to GND (pin4) very close to the module (within 10 cm)." However, the example circuit on Page 2 shows the sense line tapping GND at the load. I tend to think the latter is true as you want to sense the Power-to-GND voltage that the load is seeing. Any help with this would be greatly appreciated.