HEIDENHAIN TNC 410 M Technical Manual page 383

6.4.7 Connecting the Braking Resistor to the UV 130(D) Power Supply Unit
Cross section
X89: Braking
resistor
April 2007
One PW 21x, one PW 1x0(B) or two PW 110B braking resistors in parallel
must be connected with the UV 130(D) power supply unit.
The braking resistor is switched on when the inverter voltage U
700 V and is switched off again as soon as it falls below 670 V.
Note
If no braking resistor is connected, the inverter voltage U
at U > 800 V all power stages will be switched off (LED for U
Z
lights up)!
The following cross section is required for connecting the braking resistor:
Braking resistor
PW 21x
2 x PW 210 in parallel
2 x PW 110B in parallel
PW 110(B)
PW 120
Pin layout on the PW 21x:
Connecting Assignment
terminal X89
1 +U
Z
2 Switch against
–U
Z
Pin layout on the PW 1x0(B):
Connecting Assignment
terminal X89
1 +U
Z
2 Switch against
–U
Z
Connecting the UV 130(D) Power Supply Unit
Cross section
2
1.5 mm
2
4 mm
2
4 mm
2
1.5 mm
2
4 mm
PW 21x braking resistor
RB1
RB2
PW 1x0(B) braking resistor;
connecting terminal X1
1
2
exceeds
Z
can increase and
Z
>>
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