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MIW-SC2A4-EN-000 - 22 / 02 / 2021
7 - 8
6.4
If applicable, connect the unregulated output (L1 and N). It can be used to
supply a 230 VAC valve, lamp, etc. when the knob is not at ‘0’ position (see
Table 1
below).
6.5
If applicable, connect the TK contacts for monitoring of the thermal motor
protection to the motor TK terminals. As standard, there is a bridge
between the TK terminals.
6.6
If applicable, connect the normally closed and normally open contacts for
external or remote ON / OFF switching (terminals OC, CC).
6.7
If applicable, connect the alarm output (N, AL). The alarm output is activated
(230 VAC) when the TK monitoring function detects motor overheating.
The maximum resistive load is 0,5 A.
ATTENTION
A safety isolator / disconnect switch should be installed on the mains electricity
side of all motor drives.
Fig. 3 Wiring diagram
Power terminal block
Control terminal block
R
S
T
N L1 U
V
W
3 x 400 VAC 230 VAC
3 ph. + N
TK TK CC CC OC OC
N AL
CL CL
ATTENTION
Make sure the connections are correct before you power the unit.
7.
Close the cover and secure it with the screws.
8.
Turn the knobs at ‘0’.
9.
Tighten the cable glands.
10.
Switch on the mains supply.
11.
The controller needs to be switched on via the left knob (marked with High).
12.
Make sure the transformer controller can operate normally (consider an isolating
switch).
13.
Turn the knobs into the relevant positions to adjust the output voltages.
Optional settings
The standard configuration of the output voltages is as indicated in
Table 1
below.
Table 1 Voltage
Knob positions
0
-
1
2
3
4
5
Regulated output [VAC]
Speed 1 - High (left knob)*
0
-
210
250
290
330
400
Speed 2 - Low (right knob)*
0
-
130
170
210
250
290
Unregulated output [VAC]
L1
0
230
230 230
230
230
230
*If input CL is closed, the high speed selection is activated. If input CL is open, the
low speed selection is activated.
THREE PHASE 400 VAC TWO-SPEED TRANSFORMER
CONTROLLER WITH TK AND START / STOP
SC2A4
