Edwards nEXT730D User Manual

provide. Alternavely the logic in
terface can be connected to the customer control
equipment.
For more informaon about the logic interface, refer to Logic interface connector on
page 35.
3.4.1 USB interface
The USB service port is designed to work in conjuncon with Edwards nST2 PC soware.
The primary purpose of this interface is to allow easy conguraon of the nEXT pump.
Some operaonal capabilies are provided, including START/STOP, to enable pump
operaonal checks to be made via the USB service port. However it is not intended as an
industrial control interface for unaended machine to machine (M2M) control.
The USB service port will support communicaons concurrently with the serial interface
in the logic interface connector. This enables the pump status and logs to be reviewed,
and the pump to be congured while the pump is installed and running.
The USB service port can only be used when the 48V d.c. power is applied.
3.4.2 Parallel control and monitoring
The simple parallel interface is a quick and easy way to control the pump.
This is the same interface used on exisng 24 V Edwards Turbo Pumps. The controls that
are available to use are start and standby. The system status can be monitored using the
normal, fail and analogue output signals.
Refer to Connect the parallel control and monitoring on page 58 for more detailed
instrucons of how to use the parallel interface.
A system operang with only a parallel connecon is not capable of adjusng the
conguraon sengs stored in the motor controller (for example, power limit seng or
controlled venng opons). In this case, all these features would be at their factory
default sengs. It is possible to manually adjust the standby speed if standby mode is
selected, however, the motor controller should be congured separately before ng
the pump to the system. This is covered in more detail in Parallel control with serial
monitoring or serial conguraon on page 20 and Motor controller conguraon (serial
conguraon) on page 20.
3.4.3 Serial control and monitoring
The serial communicaons link provides complete control and monitoring by using just
three signal lines.
The serial data lines share the same connector pins as the parallel signals standby and
fail. The serial data lines can be congured to provide an RS485 compliant or RS232
compable interface by seng the posion of the RS485/CAN/RS232 slide switch.
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 and acts as an interlock. For pure serial control, the
parallel start signal will be le unconnected.
The motor controller will sll provide the normal and analogue signals on the logic
interface connector even when operang under serial control. The status of the normal
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B8J200880_D - Overview

Edwards nEXT730D Specifications

General

Brand	Edwards
Model	nEXT730D
Category	Water Pump
Language	English