Power Supply; Nc Power Supply For Le 426 Cb/Pb, Le 430 Ca/Pa - HEIDENHAIN TNC 426 PB/M Technical Manual

3.4 Power Supply

3.4.1 NC Power Supply for LE 426 CB/PB, LE 430 CA/PA

X31: NC supply
voltage
LE 426 CB,
LE 430 CA
LE 426 PB,
LE 430 PA
December 2001
Danger
The dc-link power supply must be opened only by HEIDENHAIN service
personnel!
Pin layout:
Cnnctn. Assignment
terminals
Equipment ground
(YL/GY)
U Phase 1
1
U Phase 2
2
–U DC-link voltage –
Z
+U DC-link voltage +
Z
Power consumption of the logic unit is approx. 55 W.
Ensure compliance with the European standard EN 55022 for
"electromagnetic interference"
7 7 7 7 Connect the LE to the ac line power through an isolating transformer or a
line filter. If the inverter is connected to the ac line power through a line
filter, the LE can be connected to this power supply.
You can switch off the power supply with Module 9167. (See "Overview of
Modules" on page 5 – 3).
Power must be supplied via an isolating transformer (200 VA, basic insulation
in accordance with EN 50178 or VDE 0550).
Ensure a reliable supply voltage for the drive control
7 7 7 7
Connect the dc-link voltage of the servo amplifier to the terminals +U
–U (385 Vdc to 660 Vdc).
Z
The LE monitors the rectified voltage:
n
An overvoltage up to 720 V is permissible for 5 seconds.
n
Over 720 V, the NC prevents a pulse release for the IGBT of the power
module: the motors coast to a non-controlled stop and there can be no
energy recovery to the dc link.
n
Below 385 Vdc (powerfail) all drives are brought to a controlled stop; the
control must be switched off and on again.
n
Below 155 Vdc, the control is reset (RESET).
n
At 135 Vdc, the dc-link power supply switches off.
Power Supply
LE 426 PB, LE 426 CB,
LE 430 PA LE 430 CA
400 Vac ± 10 %
50 to 60 Hz
via isolating transformer
385 Vdc to 660 Vdc –
Other voltage ranges
on request
and
Z
3 – 23