Nidec Digistart D3 User Manual

24 Digistart D3: User Guide
Issue: G
4.1.5 Start/Stop control logic
The Digistart D3 has three fixed inputs for remote control. These inputs should be controlled by contacts rated for low
voltage, low current operation (gold flash or similar).
The maximum cable run is determined by the type of cable used, provided the maximum resistance of this cable does
not exceed 100 Ohms. The cables must be twisted in pairs and shielded. The shield must be grounded at one end
only, that is, at the soft starter end. To avoid any EMC disturbance from the motor power cables, the thermistor cable
must be separated from the motor power cables by a minimum parallel distance of 300 mm.
1
2
3
+24V
D
I2
+2
4
V
DI1
+24V
DI3
E E E
+
24
V
DI2
+24V
DI
1
+24V
D
I
3
+
24
V
DI2
+24V
D
I1
+
24
V
D
I3
08340.A
Start/stop
R
es
e
t
S
tart
Stop
R
es
e
t
Start
S
t
op
Re
se
t
1
Two-wire control
2
Three-wire control
3
Four-wire control
NOTE
For comprehensive information on control connection, see Control connections on page 26.
CAUTION
The control inputs are powered by the soft starter. Do not apply external voltage to the control input
terminals.
Cables to the control inputs must be segregated from mains voltage and motor cabling.
NOTE
You can set the Reset input to either NO or NC (default). See Pr 3N Remote Reset Logic.
4.1.6 Relay Outputs
The Digistart D3 provides four relay outputs, one fixed and three programmable.
The Run output closes when the soft start is complete (when the starting current falls below 120% of the programmed
motor full load current) and remains closed until the beginning of a stop (either soft stop or coast to stop).
Operation of the programmable outputs is determined by the settings of Pr 4A~4I.
• If assigned to Main Contactor, the output activates as soon as the soft starter receives a start command and
remains active while the soft starter is controlling the motor (until the motor starts a coast to stop, or until the
end of a soft stop).
• If assigned to a trip function, the output activates when a trip occurs.
• If assigned to a flag, the output activates when the specified flag is active (Pr 7A~7C).
CAUTION
Some electronic contactor coils are not suitable for direct switching with PCB mount relays. Consult the
contactor manufacturer/supplier to confirm suitability.
Three additional outputs are available on the input/output expansion card.

Nidec Digistart D3 Specifications

General

Brand	Nidec
Model	Digistart D3
Category	Controller
Language	English