Edwards nEXT400 User Manual

Refer to Table: Logic interface connector pins when y
ou connect the electrical supply to
the customer connector mang half.
Figure 13 Logic interface connecons - parallel control
1. 24 V d.c. electrical supply 2. Fuse
3. Oponal LED indicat
or ‑ system OK 4. Oponal LED indicator ‑ normal speed
5. Current limit resistor for LED 6. nEXT pump logic interface
7. Start switch 8. Oponal standby switch
9. Oponal voltmeter to monitor analogue
output
1. 24 V d.c. electrical supply 2. Fuse
3. Oponal LED indicator ‑ system OK 4. Oponal LED indicator ‑ normal speed
5. Current limit resistor for LED 6. nEXT pump logic interface
7. Start switch 8. Oponal standby switch
9. Oponal voltmeter to monitor analogue
output
Note:
The volt
age supply to the pump controller can be more than 24 V. But the circuits
connected to the normal and fail line must have maximum external pull‑up voltage
rang as given in Table: Logic interface technical data.
4.6 Connect the parallel control and monitoring
To make the connecons for the parallel control and monitoring, use an applicable
mang half (not supplied).
CAUTION: BACK EMF SUPPRESSION DIODE
Risk of damage t
o equipment. If the normal and fail lines are used to drive the coils of
the d.c. relays, install a back EMF suppression diode in parallel with each relay coil to
protect the pump.
Connect the customer control equipment to the control input pins of the customer logic
interface mang half. Refer to Table: Logic interface connector pins to idenfy the
connector pins of the logic interface.
The control inputs are:
▪ Start
▪ Standby speed
To acvate one of the control inputs, connect the control input pin to the 0 V control
reference. To start the pump, connect the pin 3 (Start / Stop) to the pin 2 (0 V reference).
To stop the pump, remove the connecon between the pin 3 and pin 2. To put the pump
in standby, connect the pin 4 (Standby) and pin 3 (Start / Stop) to pin 2 (0 V reference).
04/2022 - ©Edwards Limited
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allaon

Edwards nEXT400 Specifications

General

Brand	Edwards
Model	nEXT400
Category	Water Pump
Language	English