What are the allowable voltage between channels and common mode voltage when connecting batteries (5 V or less) in series and measuring voltage at both poles of each battery on the DR232?

The following voltages can be applied. Ground potential: 350 VDC (common mode noise voltage 250 VACrms × 1.1414). Between ch: 200 VDC (max. noise voltage between channels 150 Vrms × 1.1414). Between channels means the voltage between channels within the same module. The voltage between modules is the same as the ground potential.