Stages; Current Measurement - Bosch PowerBox PBX 190 Manual

Bosch Motorsport
Recommended wiring
2.5 48 V Stages
GND of 48 V and GND of 12 V battery must be shorted. A galvanic isolation of supplies is
not supported. An external capacitor is recommended to limit voltages spikes on the sup-
ply line at load drop.
It is recommended to use an external fuse when using 48 V to be safe in case of a shortcut
to GND. For details using 48 V in PBX 190 please contact Bosch Motorsport.

2.6 Current measurement

Each Output stage has its own shunt resistor to measure the output current. Here you can
find an overview of the current measurement accuracy.
HS_15A
HS_25A, HS_40A
PWM_15A
HS48V_25A
Measurement range
0 to 95 A
0 to 190 A
-40 to 40 A
0 to 80 A
PowerBox_PBX_190_Manual
Hardware | 2
Accuracy
1 % ±50 mA
1 % ±100 mA
1 % ±50 mA (depends on
PWM frequency and duty
cycle)
1 % ±50 mA
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