Power Supply Of The Bf 250 Visual Display Unit - HEIDENHAIN iTNC 530 HSCI Service Manual

18.11 Power supply of the BF 250 visual display unit

Device powering the BF 250
(alternatives)
Further information and connector layout of X1 --> See "Connector designations and pin layouts" on
page 28 – 453.
Supply voltage:
Power consumption:
Errors
Troubleshooting
February 2012
UEC 11x
PSL 130
PSL 135
Note
The BF 250 features "power distribution switches."
These are electronic fuses that separate USB devices that draw too much current from
the BF 250.
The screen remains black.
The connected USB device cannot be addressed.
Measure the 24 V voltage at X1.
Try USB devices with lower current consumption.
Note
If USB components that are connected to X141 to X144 require more than 0.5 A, a separate power
supply becomes necessary for these components. One possibility is the USB hub from
HEIDENHAIN.
Disconnect all USB devices and the TE 6xx keyboard unit from the BF 250.
Connector for BF 250
power supply
X1
+24 Vdc
50 W
Devices and outputs powered by
BF 250
USB devices
TE 6xx keyboard unit
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