Vers. No. 1.048 Released: 2/12/20114 Connection → Q.brixx A108: Connecting sensors and I/O4.11.1 VoltageYou can measure voltages of up to ±10 V.IMPORTANTVoltages which exceed the admissible limits produce incorrectmeasurement data, because the inputs are protected againstovervoltages and limit the input voltage.Fig. 4-48 A108, voltage measurement (terminal version); in the ver-sion with BNC sockets the (inner) pin contact has to beconnected to +. The outer conductor is connected to –.4.11.2 CurrentFor current measurement you need for the connector strips ver-sion the Q.bloxx Terminal SR connecting plug containing theshunt resistances for the terminal version. This facilitates themeasurement of currents of up to 25 mA. In the version with BNCsockets you must use a suitable shunt resistance and determinethe current from the voltage drop and the resistance value of theshunt. The connection is made as for the voltage measurement.Fig. 4-49 A108, current measurement using the Q.bloxx TerminalSR.4.11.3 Digital input and outputOn each connecting plug of the terminal version two contacts areavailable in each case for an input and an output.Fig. 4-50 A108, digital input and output.The digital input is active (high level) when the applied signalvoltage lies above the threshold of 10 V.U3, 5, 7, 9 (A In +)4, 6, 8, 10 (AIn –)I3, 5, 7, 9 (AIn +)4, 6, 8, 10 (A In–)Input OutputDin Dout1+V0V2
