Drive Unit Monitoring - Bosch Rexroth Hagglunds DUc MS2 Installation & Maintenance Manual

Scope of delivery | Hägglunds DUc Drive unit 25/88

5.7 Drive Unit monitoring

If no monitoring function is included with the Drive Unit, the following function
must be fulfilled in the system. See order specific Hägglunds DUc documention for
the monitoring settings.
The monitoring of the Drive Unit switches and sensors are grouped in two levels
according to Fig. 9.
The warning indication is to give an indication about a problem in the Drive Unit
that does not need an immediate action.
The alarm indicates a need for stopping the pump. The stop sequence is to first
stop the hydraulic motor by setting the pump swash angle to zero without ramp
to allow the hydraulic drive to stop and after a short delay switch off the electric
motor.
The low (charge) pressure indicator must be interlocked during stop and startup
of the electric motor to avoid alarm and give the pump time to build up the charge
pressure after start.
DD00066427
Fig. 9: Example of monitoring logic diagram with ISO VG 68 oil
RE 15326-WA, Version 06.2020, Bosch Rexroth AB