NORD Drivesystems BU0230 - Manual (Page 29)

2 Description of function
BU 0230 GB-2712 29
2 Function description
To avoid danger to persons and to prevent damage to material, machines must be able to be switched off
safely. NORDAC SK 205E, SK 210E, SK 215E, SK 230E and SK 235E series frequency inverters provide safe
shut-down methods.
In order to understand the function of the shut-down methods, it is first of all necessary to consider the function of
the frequency inverter.
The mains voltages are rectified and the resulting DC link circuit voltage is reconverted to AC according to the
requirements of the operating status of the motor (frequency and voltage).
Size 1 to 3:
Input
circuitry
Control
Option "safe pulse block"
I / O
Emergency
Low voltage detection
Current limiter
Driver µ C
T 5
T 6
T 3
T 4
T 1
T 2
U
V
W
M
Frequency Inverter
Logic
I / O
L 1
L 2
L 3
G N D
2 4 V
24V_SH
GND_SH
=
=
=
=
only SK2x0E
only SK2x5E
stop