4−6 Electric Drives
and Controls
Bosch Rexroth AG RhoMotion 1070072365 / 04
Electrical Connections
4.3 24 VDC power connection
X10 24 VDC power connection
At the X10 plug, the 24 Volt industrial voltage is fed, filtered and applied
to the power supply unit.
The power supply unit transforms the 24 V into different voltages.
X10
2134
Pin Assignment
1
+24V distribution voltage
2
3
+24V distribution voltage
0V distribution voltage
0V distribution voltage
4
++
−−
−
The pins 1 and 2 or 3 and 4 are connected with each other on the printed
board. Per contact, approx. 5 A at 70 °C can be transmitted.
Fuse: 5 A neutral
The connection is executed with reverse battery protection.
The rho4.0 is provided with a DC/DC converter with galvanic separation
(insulation resistance 500 V
DC
) which produces from a 24-V power sup-
ply unit all required voltages.
working range: 24 V (−15 % / +20 %)
monitoring: The +24 V are checked for undervol-
tage.
When the monitoring threshold of
17 V ±5 % is exceeded, the ready relay
contact opens.
Besides the voltage tolerances, a whole alternating voltage component
with a peak value of 5 % of the nominal value is allowed.
Absolute limits: +30 V/19,2 V
Holding time of the system voltages in case
of power failure:
>10 ms and
24 V − 15 %
DANGEROUS ELECTRICAL VOLTAGE
The 24 VDC input voltage must comply with the requirements
of “protective separation”!
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