Pw 1X0(B) And Pw 21X Braking Resistors For Ue 2Xxb Compact Inverter - HEIDENHAIN TNC 410 M Technical Manual

5.5.8 PW 1x0(B) and PW 21x Braking Resistors for UE 2xxB Compact Inverter

Cross section
X89: Braking
resistor
April 2007
Connecting the UE 2xxB and UR 2xx(D) Compact Inverters
An external braking resistor must be connected to the UE 230B and UE 24xB
compact inverters, as these inverters are not equipped with internal braking
resistors.
An external braking resistor can also be connected to the UE 21xB compact
inverters instead of the internal braking resistor. This may be necessary if the
internal resistor can no longer fully absorb the excessive braking energy, or if
the braking resistor needs to be mounted outside the control cabinet.
Either one PW 1x0(B), one PW 21x, two PW 210 or two PW 110B switched
in series can be connected to all UE 2xx B compact inverters.
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 > 760 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
1 x PW 21x
2 x PW 210 in parallel
2 x PW 110B in parallel
1 x PW 110(B)
1 x PW 120
Pin layout on UE 21xB for internal braking resistor:
Connecting Assignment
terminal X89A
UE 21xB
1 Do not assign
2 Do not assign
Cross section
2
1.5 mm
2
4 mm
2
4 mm
2
1.5 mm
2
4 mm
Connecting Assignment
terminal X89B
UE 21xB
1
2
exceeds
Z
can increase and
Z
>>
DC-LINK
Jumper
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