Edwards nEXT730 - Logic Interface Connector

B8J200880_E - Technical data
Page 41
required. If serial communications is available, the power limit setting of the nEXT pump
can be selected.
Refer to Table: Logic interface technical data for the maximum power limit settings for
nEXT pumps. If the application requires rapid cycling of the pump, faster ramp times can
be achieved if the power supply delivers higher current, up to a maximum in accordance
with Table: Logic interface technical data.
If the facility to adjust the power limit setting is not available, use a power supply
capable of delivering enough current to meet the Edwards factory default power limit
setting, shown in Table: Logic interface technical data.
4.9 Logic interface connector
nEXT pumps have a 15-way logic interface connector on the end of the logic interface
cable. Use a suitable connector mating half (not supplied) to connect the nEXT pump to
the customer equipment. Refer to the following table for the connector mating half
type.
Table 10 Logic interface technical data
Logic interface item
Connector
*
15‑way D‑type male
Start and serial enable control inputs:
Enabled control voltage: low (close)
0 to 0.8 V d.c. (Iout = 0.55 mA nominal)
Disabled control voltage: high (open)
4 to 26.4 V d.c. (internal pull up to 6.4 V
nominal)
Standby control input:
Enabled control voltage: low (close)
0 to 0.8 V d.c. (Iout = 0.29 mA nominal)
Disabled control voltage: high (open)
4 to 26.4 V d.c. (internal pull up to 3.2 V
nominal)
Analogue output:
Output voltage
0 to 10 V d.c. (directly proportional to
measured parameter)
Motor speed: 0 ‑ 820 Hz (0‑100%) for
nEXT730/930,
0 ‑ 700 Hz (0‑100%) for nEXT1230
Motor power: 0 ‑ 500 W for nEXT730/930,
0 ‑ 660 W for nEXT1230
Motor temperature: 0 ‑ 100 °C
Controller temperature: 0 ‑ 100 °C
Bearing temperature: 0 ‑ 100 °C
Voltage accuracy
± 0.2 V
Output current
 5 mA for specified accuracy
Normal status output:
Type
Open collector transistor plus pull up
resistor. Refer to Figure: Interface circuits
for nEXT turbo pump controllers