Bosch BAT 645 - Measuring Points on the Power Module

1 689 975 285 2017-06-30| Robert Bosch GmbH
26 | BAT 645 | Faults & Troubleshootingen
5.6 Measuring points on the power module
DANGER - Risk of electric shock from live parts!
¶ Work on electrical systems or equipment must only be performed by qualified electricians or
trained personnel under the guidance and supervision of an electrician.
¶ Observe the electrical engineering safety regulations.
Voltage measurement From To Value, approx.
Measure the voltage after the power inlet socket connector X4 X2 230V
Measure the voltage after the device fuse M1 M2 230V
Measure the link voltage (UZK) C58+ C58- 360V
Measure the 1st primary auxiliary voltage VDD GND 13V
Measure the 2nd primary auxiliary voltage VDD2 GND 12V
Measure the auxiliary voltage IC 14 Pin 1 GND1 Pin 4 12V
Measure the controller voltage 3V3 GND1 Pin 2 3.3V
Measure the reference voltage 3V3ref GNDA 3.3V
Voltage on the power module with a 12-V battery U
ist
= 12V GNDA 0.85V
Voltage on the power module with a 24-V battery U
ist
= 24V GNDA 1.7V