5.8 Installation with Main Contactor
The MCD 500 is installed with a main contactor (AC3 rated). Control voltage must be supplied from the input side of the
contactor.
The main contactor is controlled by the MCD 500 Main Contactor output, which by default is assigned to Output Relay A
(terminals 13, 14).
KM1
KM1
F1
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
1
7
7
H
A
5
2
2
.1
0
24
VDC
Illustration 5.10
1
Control voltage (model dependent)
KM1
Main contactor
2
24 VDC 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
Table 5.11
Parameter settings:
•
4-1 Relay A Function
•
Select Main Contactor - assigns the Main Contactor function to Relay Output A (default value).
Application Examples
MCD 500 Operating Instruction
38
MG17K402 - VLT
®
is a registered Danfoss trademark
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5