It sound like you need a multiplexer. National Instruments has a multiplexer switch that might suit your application. It is the SCXI-1127, that can switch a signal 300V with a bandwidth upto 11MHz. If you have pulses that are smaller than 90ns or a signal frequency greater than 11MHz you will see a degradation of your signal. There are switches that can switch signals with higher bandwidths, but they won't go up to 200V(i.e. SCXI-1190, SCXI-1192).
Here is the data sheet for the
SCXI-1127.
The SCXI-1127 has a screw terminal block to connect to your signals to be routed.
Good Luck,
Michael
