December 2001 Power Supply 3 – 23
3.4 Power Supply
3.4.1 NC Power Supply for LE 426 CB/PB, LE 430 CA/PA
X31: NC supply
voltage
Pin layout:
Power consumption of the logic unit is approx. 55 W.
LE 426 CB,
LE 430 CA
Ensure compliance with the European standard EN 55022 for
“electromagnetic interference”
7
77
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).
LE 426 PB,
LE 430 PA
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
77
7 Connect the dc-link voltage of the servo amplifier to the terminals +U
Z
and
–U
Z
(385 Vdc to 660 Vdc).
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.
Danger
The dc-link power supply must be opened only by HEIDENHAIN service
personnel!
Cnnctn.
terminals
Assignment LE 426 PB,
LE 430 PA
LE 426 CB,
LE 430 CA
Equipment ground
(YL/GY)
U
1
Phase 1 400 Vac ± 10 %
50 to 60 Hz
via isolating transformer
U
2
Phase 2
–U
Z
DC-link voltage – 385 Vdc to 660 Vdc
Other voltage ranges
on request
–
+U
Z
DC-link voltage +
To Next Page
Loading...
