APPLICATION EXAMPLES
11.4
Auxiliary Trip Circuit
In normal operation the EMX3 is controlled via a remote two-wire signal (terminals C31, C32).
Input A (terminals C53, C54) 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, which stops the motor.
32
31
6/T3
2/T1
13
14
P24
COM
4/T2
24
23
34
B10
B11
41
42
44
B5
B4
C31
C32
C41
C42
C53
C54
C24
C64
C63
B7
B8
B6
A2
A1
A3
5/L3
3/L2
C23
E
1/L1
7
6
5
4
3
2
1
8
9
05972.
D
1
Control voltage (model dependent)
2
Remote control inputs
3
Motor thermistor input
4
RTD/PT100 input
5
24 VDC output
6
Relay outputs
7
Analog output
8
Three-phase supply
9
Motor terminals
S1
Start/stop contact
S2
Reset contact
S3
Auxiliary trip contact
F1
Semiconductor fuses (optional)
13, 14
Relay output A
23, 24
Run relay output
31, 32, 34
Relay output B
41, 42, 44
Relay output C
Parameter settings:
•
Parameter 6A
Input A Function
•
Select 'Input Trip (N/O)'. Assigns the Input A to Auxiliary Trip (N/O) function.
•
Parameter 6B
Input A Name
•
Select a name, eg Low Pressure. Assigns a name to Input A.
•
Parameter 6C
Input A Trip
•
Set as required. For example, 'Run Only' limits the input trip to when the soft starter is running only.
•
Parameter 6D
Input A Trip Delay
•
Set as required. Sets a delay between the input activating and the soft starter tripping.
•
Parameter 6E
Input A Initial Delay
•
Set at around 120 seconds. Limits operation of the input trip to 120 seconds after the start signal. This allows
time for pressure to build up in the piping before the low pressure input becomes active.
User Manual (710-04840-00M) |
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