Phoenix contact 2810939 mcr c ui ui dci nc configurable 3 way isolation amp phoenix contact 2810939 the phoenix contact configurable 3 way isolation amplifier mcr c ui ui dci nc is a 3 way isolation amplifier for electrical isolation of analog signals via dip switch configurable input output with more than 225 kinds of input output signal combinations br br phoenix contact 2810939 mcr c ui ui dci nc configurable 3 way isolation amp