I have connected 3 instruments on my GPIB net which works fine but sometimes we have to switch off one of the oldest equipment which in turn brings the entire bus down. My solution to this is ro have a GPIB-120B bus expander in between the instrument in question and the rest. My question is what load would the GPIB-120B impose on the bus when I turn the power off on the expander. My idea here is to disconnect the mains of both the troublesome instrument and the expander at the same time and then hopefully the GPIB would not collapse.
Has anyone insight into this?
GPIB controller ---- instrument 1 ---- instrument 2---- GPIB-120b---instrument in question
A A
mains switch------------------------------------------------------------------------------------