Data recorder modules for in-dummy data acquisition in crash testing / DTI375

Within the DTI technology (Digital Transducer Interface), the data recorder is the core element for recording in-dummy measuring values. Depending on the instrumentation of the dummy, the data recorder can be used to record measured values of up to 96 DiMod channels through its signal interface module with 8 DTI ports. Each port can be connected via DTI bus with up to 12 DiMod channels. For power supply on the connected DTI bus, each DTI port has its own short circuit proof control unit which sets the output voltage to 5.6 V and provides a maximum of 500 mA. The overall current is restrained by the power rating of the attached UPS power supply. The data recorder in combination with a Type DTI375.01 power supply can deliver a total of approximately 5 A. On the DTI bus cable remains a reserve of 0.5 V with the voltage set to 5.6 V which is sufficient at full load for a cable length of 5 m – standard wire diameter assumed, e.g. AWG26. In addition, each DTI port has its own RS-485 driver and receiver for data transmission on the bus. In order to ensure uninterruptible measuring and recording even when the main supply voltage fails, each data recorder is powered by a backup power supply (Type DTI375.01). The recorder controls the attached UPS through the I²C bus and continuously collects all relevant operating data like charge balance and battery capacity. This data can be retrieved by an appropriate application software at any time.