Digital Module VT2516 The VT2516 module is connected to up to 16 mainly digitally used I/Os of an ECU, i.e. for signals with two states. For example, they may connect to these pins, switches or signal lamps. Technical Data (VT2516) Input voltage -40 V … +40 V Current via relays Max. ±800 mA Input of digital signal Threshold 0 … 25 V Hysteresis Approx. 1 V Sampling interval 50 μs PMW frequency (PWM measurement) 15 mHz … 25 kHz Voltage measurement Accuracy ±2 % Sampling rate 1 kSample/s Output of digital signal High level, low level 0 … 25 V Accuracy ±2 % Output current –30 … +30 mA Length of bit stream 2 … 4,096 Bit Output of interval 2 μs … 65 ms Frequency of generated PWM signal 0.1 Hz … 25 kHz Supply voltage (via backplane) 12 V ±10% Power consumption (all relays off) Typ. 8 W Power consumption (32 relays active) Typ. 13 W Temperature range 0 … 55°C Dimensions (L x W x H) 300 x 173 x 36 mm Weight Approx. 540 g Features offered on each channel: > Various signal paths to the original sensor or the original actu-ator are switched via relays and are connected to a bus bar. The relays may be used, for example, to disconnect the line (broken wire simulation). > Relay for short circuit between an input line and ground or battery voltage > Relay for a connected external load, pull-up or pull-down resistor > Sampling of a digital input value with configurable voltage threshold > Determination of PWM signal parameters (frequency and duty cycle) > Voltage measurement with calculation of instantaneous and average values > Digital output with configurable high and low levels > Autonomous output of a bit stream loaded into module > Generation of a PWM signal > The bus bar has a two-pole design, where the second pole may be selected as ground or battery potential. 4/6 Digital Module VT2516 Schematic of one channel of the VT2516