7 | Inputs and Outputs
20/148 DDU 9 Bosch Motorsport
7 Inputs and Outputs
7.1 Input channels
Analog inputs
The DDU 9 analog inputs accept an input signal of 0 to 5 V. A 3.01 kOhm pull-up resistor
can be activated by software.
Digital inputs
The digital inputs of the DDU 9 accept 0 V to 5 V signals of Hall-effect sensors by default.
Connect the output of the Hall-effect sensor to the REVn_P pin and leave the REVn_M pin
open.
7.2 Output channels
Sensor power supply
The DDU 9 has four sensor power supplies:2 x 5 V, 1 x 10 V and 1 x Ubat regulated
voltage. They are short circuit protected to battery voltage and GND.
7.3 Communication channels
CAN bus
The DDU 9 has two CAN buses configurable as input and output. Different baud rates are
selectable. Please note that the DDU 9 does not contain any CAN termination resistors.
Thus the CAN termination resistors need to be integrated into the wiring loom.
Ethernet channels
The DDU 9 has one 100 MBit full duplex Ethernet communication ports. The port is intern-
ally connected with an Ethernet switch. The Ethernet ports have 'cable auto crossover'
functionality.
RS232 ports
The DDU 9 has two RS232 serial ports. Baud rate for both ports is programmable. RS232
port 1 is reserved for online telemetry, port 2 can be used for reception of data from a
serial GPS receiver.
Vehicle diagnosis connector
The Bosch Motorsport vehicle diagnosis connector is used as a standard interface to con-
nect the vehicle to a PC e.g. via a MSA-Box II. Loom connector: AS0-12-35SN
Pin Name Description Used for DDU 9
Pin 1 Terminal 30 Permanent positive +
Pin 2 Terminal 15 Switched positive +
Pin 3 Terminal 31 GND +
Pin 4 CAN High Diagnostic CAN bus
Pin 16 CAN Low Diagnostic CAN bus
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