Bosch Rexroth Rho 4.0 - Power Connections; Monitoring of the System Voltage

Electric Drives
and Controls
4−9Bosch Rexroth AGRhoMotion1070072365 / 04
Electrical Connections
4.3.1 Power connections
All system voltages have potential reference under each other and are
connected to a place with housing potential.
system voltages voltage max. cur-
rent
tolerance Undervolt. detection Overvolt. protection
Logik +5 V 5 A ±3% +4,6 V +6 V
Floppy + PCI plug
place
+12 V 1A ±5% +10,5 V +13 V
PCI-plug place −12 V 150 mA ±5% −10,5 V −13 V
system voltages voltage max. cur-
rent
tolerance Undervolt. detection Overvolt. protection
IO-voltage 24 V 10 A reverse batt. protec-
tion
12-V-power supply unit
For the floppy and the PCI bus, a 12-V voltage power supply is required.
It is produced by a controller and supplies 1 A. The voltage is coupled
galvanically with the 5-V- and the −12-V- power supply unit.
−12-V-power supply unit
For the PCI-Bus plug, a −12-V voltage power supply is required. sversor-
gung benötigt. It is produced by a controller and supplies 150 mA. The
voltage is coupled galvanically with the 5-V- and the −12-V- power sup-
ply unit.
4.4 Monitoring of the system voltage
When a undervoltage error is detected, the ready contact opens and the
DC/DC converter is switched off. The converter can be then only swit-
ched on through switching off and on the 24-V voltage power supply or
through the RESET key.
When a overvoltage error is detected, the DC/DC converter is switched
off. The ready contact opens indirectly through the arising undervoltage
error.