Edwards nEXT400 User Manual

Refer to Logic int
erface connector on page 31 for more informaon about the logic
interface.
2.5.1 Parallel control and monitoring
The simple parallel interface is a quick and easy way to control the pump. Same interface
is used on the 24 V manufacturer's Turbo Pumps. The start and standby controls are
available to use. You can monitor the system status using the normal, fail and analogue
output signals.
Note:
The serial enable swit
ch must be open (no connecon) and the slide switch must be in
the RS232 posion. Refer to Connect the parallel control and monitoring on page 46.
Refer to Connect the parallel control and monitoring on page 46 for more instrucons
about how to use the parallel interface.
A system that is in operaon with a parallel connecon only is not capable to adjust the
conguraon sengs stored in the controller (for example, power limit seng or
controlled venng opons). In this case, all these features will be at factory default
sengs. You can manually adjust the standby speed if standby mode is selected, but the
controller must be congured separately before the installaon of the nEXT pump to the
system. Refer to Controller conguraon (serial conguraon) on page 17 for more
informaon.
2.5.2 Serial control and monitoring
The serial communicaons link gives complete control and monitoring by using three
signal lines.
The serial data lines have the same connector pins as the parallel signals standby and
fail. The serial data lines can be congured to give an RS485 compliant or RS232
compable interface by seng the posion of the RS485 / RS232 slide switch. Refer to
Connecon for serial control and monitoring on page 47.
The serial enable signal must be linked to 0 V for the system to accept commands from
the serial link. This is a safety feature which operates as an interlock. For pure serial
control, the parallel start signal will be le unconnected.
The motor controller will connue to give normal and analogue signals on the logic
interface connector even when operang under serial control. You can get the status of
the normal signal and the value of the system parameter on the analogue output by
interrogang the system status through the serial link.
Refer to Connecon for serial control and monitoring on page 47 for more informaon
about the serial interface.
2.5.3 Serial control with parallel monitoring
Normal and analogue signals stay available when using serial control. You can control the
pump through the serial link while monitoring the normal and analogue signals in the
parallel interface.
04/2022 - ©Edwards Limited
Page 16B80000880_G
B80000880_G - Intr
oducon

Edwards nEXT400 Specifications

General

Brand	Edwards
Model	nEXT400
Category	Water Pump
Language	English