User Manual

14/16 Bosch Rexroth AG
RC RE 95201/11.07
• Notes on circuitry and on wiring:
– The lines used for speed sensors are to be shielded. The shield must be connected to the electronics on one side or to the
machine or vehicle ground via a low-resistance connection.
– Cables to the electronics must not be routed close to other power-conducting lines in the machine or vehicle.
– The electronics and the power outputs of a controller must be fed from the same power source.
– The wiring harness should be fixated mechanically in the area in which the controller is installed (spacing < 150 mm).
The wiring harness should be fixated such that a phase excitation with the controller occurs
(e.g. at the controller mounting point).
– When wiring the output stages, the maximum cumulative output current for each output stage group should be noted.
The cumulative output current means a permanent, simultaneous actuation of the output stages.
• Notes on proportional solenoids and switching solenoids and other switched inductive consumers:
– The electronics may only be tested with the proportional solenoids connected.
– The proportional solenoids must not be wired with suppression diodes.
– Switching solenoids at the outputs of the controller RC do not need to be connected to suppression diodes.
– Other inductive loads that are in the system but not connected to the controller RC must be connected to
suppression diodes.
Safety features in the BODAS controller
– The input circuits for speed and analog signals partially feature circuits that are mutually electrically isolated.
Through appropriate input connections, the microcontroller and, when used, the software diagnostic function can detect faults.
– Faults in the supply voltage are detected by internal monitoring.
– All output signals can be monitored by the microcontroller with the appropriate software.
– For service purposes, the controllers can be operated with all power outputs de-energized.
– The internal watchdog module centrally switches off all proportional and switched outputs in the event of disturbances to the
program execution.
Product-specific notes
– By means of appropriate circuitry and through the use of the software diagnostic function, it is possible to detect cable breaks
or short circuits on the potentiometers by circuit logic.
(See circuit version: Monitored potentiometers)
– Via the release input, the output stages (proportional and switched outputs) are switched off independent of the CAN bus.
Safety measures during use of the BODAS controller
– Faults can be detected and specially programmed safety functions activated by means of appropriate input variable assign
-
ments (e.g. connection of the acceleration pedal signal to two independent analog inputs).
– Special safety functions can be initiated if the plausibility check reveals discrepancies between the setpoints and the values
read back by the microcontroller.
Safety Notes