I don't think there's a ZP100. There's a ZP90 and ZP120, both have digital outputs.
There's a BR100, which is a "zone bridge" - basically a wireless distributor. The BR100 doesn't play any music, it just sends it to the ZP's.
In any system, DACs can't connect to analog outs; only digital outs. There are some DACs that allow analog pass through, like the Benchmark DAC1 Pre, but that doesn't convert an analog signal, its basically a pre-amp with DAC.
There's a BR100, which is a "zone bridge" - basically a wireless distributor. The BR100 doesn't play any music, it just sends it to the ZP's.
In any system, DACs can't connect to analog outs; only digital outs. There are some DACs that allow analog pass through, like the Benchmark DAC1 Pre, but that doesn't convert an analog signal, its basically a pre-amp with DAC.