1.1 FeaturesThe standard DSC-200/300 implements each of its communication channels with a 16550UART and uses standard line driver and receiver components. For improved performance andindustrial-grade reliability, Quatech offers the following board upgrades:1.1.1 "IND" Option --- Surge Suppression UpgradeThe "IND" option provides the protection essential for reliable use in an industrialenvironment. Each communication line has a surge suppressor capable of sustaining up to 40A20us peak transient surges, a clamping voltage of 30V and a peak energy dissipation of 0.1Joules.yesDSC-200/300INDnoDSC-200/300IND OptionPart NumberFigure 1 --- DSC-200/300 Product Series SummaryQuatech DSC-200/300 User's Manual 6