Owner's manual

4 Commissioning
BU 0240 GB 25
Minimal configuration with options
In order to implement completely autonomous operation (i.e. independent of control cables etc.) a
Potentiometer Unit (SK CU4-POT) is required. In combination with an integrated mains unit
(SK CU4-…-24V) a solution can be implemented with only one mains cable (1~ / 3~ according to the
version), and a suitable speed and direction control can be ensured (See connection example below).
This configuration method also provides the possibility of setting the frequency inverter to start automatically
with "Mains On", by changing parameter (P428).
Connection plan and parameterisation of SK CU4-POT, example

 
SK CU4-POT
Potentio
-
meter
0-10
R/0/L
Switch
Frequency inverter
SK 2x5E-...
Control terminal bar
44
40
.
.
21
22
23
24
.
.
.
L1 - L2/N - L3
115/230/400V
24V mains unit
SK CU4-24V-...
L1 - L2/N
115/230/400V
24V=
GND
10V=
AGND
0-10V
R
L
0-100%
1/3~115/230/400V+PE
Control terminal bar
44 40 44 ... 11 14 12 B1
(br)
(bl)
(br)
(blk)
(gn)
(br)
(white)
(bl)
DIP switch settings: DIP3 = off, DIP4 = on, DIP5 = off
or
recommended
parameter setting, DIP1-8 = off: P400 [07] = 1 P420 [02] = 2
P420 [01] = 1 P420 [03] = 26
NOTE
An 8-Bit A/D converter is integrated into mains units SK TU4-…-24V and SK CU4-…-24V. This
makes it possible to connect a potentiometer or other analog setpoint source to the mains unit
and to transfer this to the digital input of the frequency inverter via a corresponding pulse signal.