Maple Systems CMT-SVR-100 Smart Server Base Model with OPC UA License, 600MH, 3G/4G USB, Smart Series Overview Maple Systems cMT-SVR Series — Smart cMT Family of IIoT Touchscreen HMIs, Servers and Communications Gateways: The cMT-SVR-100 is a powerful headless operator interface that allows you to use an Apple iPad/iPhone, or Android tablet/smart phone to access your industrial control..