5.8 Installation with Main Contactor
The VLT
®
Soft Starter MCD 500 is installed with a main contactor (AC3 rated). Supply control voltage from the input side of
the contactor.
The soft starter main contactor output controls the main contactor. The main contactor output is by default assigned to
output relay A (terminals 13, 14).
K1
K1
F
22
21
6/T3
2/T1
13
14
4/T2
24
33
34
06
05
08
07
17
18
25
11
16
A6
A5
A4
5/L3
3/L2
15
S1
S2
E
1/L1
+
+
5
6
7
4
2
A
3
1
177HA522
.1
24
VD
1
Control voltage (model dependent)
K1
Main contactor
2
24 V DC output
F1
Semiconductor fuses (optional)
3
Remote control inputs
S1
Start/stop
4
Motor thermistor input (PTC only)
S2
Reset contact
5
Relay outputs
13, 14
Relay output A
6
3-phase supply
21, 22, 24
Relay output B
7
Motor terminals
33, 34
Relay output C
Illustration 5.10 Installation with Main Contactor
Parameter settings:
•
Parameter 4-1 Relay A Function
-
Select
Main contactor
- assigns the main contactor function to relay output A (default value).
Product Features
Operating Guide
MG17K602
Danfoss A/S © 05/2016 All rights reserved.
43
5
5
