The major differences are the number port of the fiber interface and the fiber-optic distance. The difference is as table above.
The major difference is the operating temperature range. ISW-511 / ISW-621 series temperature range is from -10 to 60 Degrees C. The ISW-511T / ISW-621T Series is from -40 to 75 Degrees C.
No, the IFT-802T could not connect to IFT-802TS15, because IFT-802T equipped 2km multi-mode fiber optical interface but IFT-802TS15 equipped with 15km single-mode fiber optical interface. Our suggestion is let IFT-802T connect to IFT-802T or IFT-802TS15 connects to IFT-802TS15.
Yes, it does, Because they equip the same 15km single-mode fiber optical interface. But, please have noticed that the ISW-511S15 operating temperature is from -10 to 60 Degree C only.
Yes, it can. The IGS-10080MFT supports AC 24V power.