Installation With Bypass Contactor - Danfoss mcd-500 Operating Instruction

5 Application Examples

5.9 Installation with Bypass Contactor

The MCD 500 is installed with a bypass contactor (AC1 rated). The bypass contactor is controlled by the MCD 500 Run Output which by default is assigned
to Output Relay B (terminals 21, 22, 24).
5
1 Control voltage (model dependent)
2 24 VDC output
3 Remote control inputs
4 Motor thermistor input (PTC only)
5 Relay outputs
6 3-phase supply
7 Motor terminals
Parameter settings:
• Parameter 4-4 Relay B Function
• Select Run - assigns the run output function to Relay Output B (default value).
42
F1
1/L1
L1B
6
3/L2
L2B
5/L3
L3B
E
A4
A5
1
A6
07
+
A
08
2
24
11
VDC
16
+
15
S1
17
3
S2
18
25
S3
05
4
06
KM1
F1
S1
S2
S3
13, 14
21, 22, 24
33, 34
MG.17.K2.02 - VLT
KM1
2/T1
7
4/T2
6/T3
13
14
21
22
5
24
KM1
33
34
Bypass contactor
Semiconductor fuses (optional)
Start contact
Stop contact
Reset contact
Relay output A
Relay output B
Relay output C
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MCD 500 Operating Instruction