Emerson Digistart IS1x0043B series User Manual

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Digistart IS User Guide 77
Issue: 4 www.controltechniques.com
10.4 Auxiliary trip circuit
In normal operation the Digistart IS is controlled via a remote two wire signal (terminals DI2, +24V).
Input A (terminals DI4, +24V) 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.
Figure 10-4 Auxiliary trip circuit
08536.A
7
6
5
4
3
2
1
8
9
6/T3
2/T1
4/T2
5/L3
3/L2
1/L1
RLC3
COM3
COM1
RLO1
+24V
0V
RLO2
COM2
RLO3
AO1
0V
COM4
RLC4
RLO4
TH2
TH1
DI2
+24V
DI3
+24V
DI4
+24V
+24V
+24V
DI5
PT4
PT5
PT3
CSR
CSL
CSH
DI1
E
E
110-210 VAC
+10%
-15%
220-440 VAC
+10%
-15%
1
Control voltage
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)
COM1, RLO1
Relay output A
COM2, RLO2
Run relay output
COM3, RLC3, RLO3
Relay output B
COM4, RLC4, RLO4
Relay output C
Parameter settings:
 Pr 3A Input A Function
 Select 'Input Trip (N/O)'. Assigns the Input A to Auxiliary Trip (N/O) function.
 Pr 3B Input A Name
 Select a name e.g. Low Pressure. Assigns a name to Input A.
 Pr 3C Input A Trip
 Set as required. For example, Run Only limits the input trip to when the soft starter is running only.
 Pr 3E Input A Trip Delay
 Set as required. Sets a delay between the input activating and the soft starter tripping.
 Pr 3D 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.

Emerson Digistart IS1x0043B series Specifications

General

Brand	Emerson
Model	Digistart IS1x0043B series
Category	Controller
Language	English