
5.10 Emergency Run Operation
In normal operation the MCD 500 is controlled via a remote two wire signal (terminals 17, 18).
Emergency Run is controlled by a two wire circuit connected to Input A (terminals 11, 16). Closing Input A causes the MCD 500
to run the motor and ignore all trip conditions.
KM1
F1
24
VDC
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
S3
S1
S2
E
1/L1
+
+
5
6 7
4
2
A
3
1
177HA524.10
1
Control voltage (model dependent) S1 Start/stop contact
24 VDC output S2 Reset contact
Remote control inputs S3 Emergency Run contact
Motor thermistor input (PTC only) 13, 14 Relay output A
Relay outputs 21, 22, 24 Relay output B
3-phase supply 33, 34 Relay output C
Motor terminals
Par. 3-3 Input A Function
Select Emergency Run - assigns Input A to Emergency Run Function
Par. 15-3 (Emergency Run)
Select Enable - Enables the Emergency Run mode
Application Examples MCD 500 Operating Instruction
MG.17.K3.02 - VLT
®
is a registered Danfoss trademark 37
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