NOTICE
Although
Emergency run
fulfills the functionality requirements of Fire mode, Danfoss does not recommend its use in
situations that require testing and/or compliance with specific standards as it is not certified.
5.11 Auxiliary Trip Circuit
In normal operation, the VLT
®
Soft Starter MCD 500 is controlled via a remote 2-wire signal (terminals 17, 18).
Input A (terminals 11, 16) is connected to an external trip circuit (such as a low-pressure alarm switch for a pumping
system). When the external circuit activates, the soft starter trips and stops the motor.
K1
F
24
VD
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
177HA525
.1
1
Control voltage (model dependent)
S1
Start/stop contact
2
24 V DC output
S2
Reset contact
3
Remote control inputs
S3
Auxiliary trip contact
4
Motor thermistor input (PTC only)
13, 14
Relay output A
5
Relay outputs
21, 22, 24
Relay output B
6
3-phase supply
33, 34
Relay output C
7
Motor terminals
Illustration 5.13 Auxiliary Trip Circuit
Parameter settings:
•
Parameter 3-3 Input A Function.
-
Select
Input Trip (N/O)
- assigns input A to auxiliary trip (N/O) function.
•
Parameter 3-4 Input A Name.
Product Features
VLT
®
Soft Starter MCD 500
46
Danfoss A/S © 05/2016 All rights reserved.
MG17K602
5
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