Edwards nEXT200200 User Manual

A feature is given that allows a delayed start of the nEXT pump. With this feature, the
v
ent valve can be closed before starng the nEXT pump. This allows the backing pump to
decrease the pressure in the vacuum system before starng the nEXT pump.
If the controller is not used to control a TAV vent valve, it can be used to operate a fan.
You can congure the controller to permanently enable the fan.
2.3.6 Normal speed seng
The normal speed is a user‑selectable parameter which can be set from 50% to 100% of
full rotaonal speed.
When the pump gets to normal speed, a signal is available on the normal pin of the logic
interface connector. The signal can be used to control the applicaon as it shows that
the vacuum performance (pump speed) is at a set level. The default seng is 80% of the
full rotaonal speed. Refer to Normal speed seng on page 59 for instrucons to
change the normal speed seng.
2.4 Logic interface
The pump controller can be operated only through the logic interface. The signals on the
logic interface are of three types:
▪ Control inputs: Switch‑type signals that are used to control the pump
▪ Status outputs: To idenf
y the status of the system
▪ Analogue output: Gives a 0 ‑ 10 V output for a number of pump parameters.
The logic interface supports the serial control and the parallel control to monitor and
control through one connector. For serial control, RS232 (default) or RS485 can be
selected using the RS485 / RS232 slide switch which is given on the motor controller.
Refer to Connecon for serial control and monitoring on page 41.
You can plug the logic interface into the manufacturer's TIC Turbo Controller or
TIC Turbo Instrument Controller and then use the given funconality. The logic interface
can be connected to the customer control system as an alternave.
Refer to Logic interface connector on page 27 for more informaon about the logic
interface.
2.4.1 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 s
witch 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 40.
Refer to Connect the parallel control and monitoring on page 40 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
Page 14
B85200880_D - In
troducon

Edwards nEXT200200 Specifications

General

Brand	Edwards
Model	nEXT200200
Category	Water Pump
Language	English