The control unit can supply a single sensor or a system consisting of two sensors with power. Several sensors that are connected via a network can also be connected to the D-ISC 100. In this case, each of the sensors must be supplied with power by means of a separate terminal box, supply unit or evaluation unit. The interconnection and the connection to the control unit is made via Modbus. A version of the control unit with an integrated purging air blower is available for D‑R 220, D‑R 320 and D‑R 808
