HEIDENHAIN iTNC 530 Service Manual page 177

Connector on the Supply voltage: 400 V ± 10 %
front panel
Pin layout:
Connecting terminal
U
V
+UDC
-UDC
Equipment ground (YL/GY) Š 10 mm2
50-pin ribbon cable When connecting to connector X69/X169 of the CC, see "X69: NC power supply and control
signals, see X169" on page 13 – 166.
5V terminal on the Pin layout:
front panel
Wire color of 5-V connection
Black
Red
May 2006
a. Connecting cable: 1.5 mm
Note
You must connect the supply voltage to the terminals U and V via an isolating transformer
(300 VA, basic insulation as per EN 50 178 and VDE 0550).
Caution
Do not ground this isolating transformer on the secondary side!
The isolating transformer decouples the dc-link voltage from ground. Grounding the isolating
transformer on the secondary side leads to an addition of the dc-link voltage and the supply
voltage. This would overload and thus destroy the UV 105 B.
Caution
For mounting the UV 105 B, the additional 5V lines must be connected with the correct
polarity!
Otherwise there will be a short circuit of these lines on the 5V ribbon wires.
Assignment
a
U
Va
DC-link voltage of the non-HEIDENHAIN
inverster system
DC-link voltage of the non-HEIDENHAIN
inverster system
2
5-V terminal on CC 42x
0V
+ 5 V
13 – 177