Edwards nEXT 55, Instruction Manual

Page: 27 / 116

Logic interface item
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 the
measured parameter)
Motor speed: 0
‑
1500 Hz (0
‑
100%)
Motor power: 0
‑
120 W
Motor temperature: 0
‑
100 °C
Controller temperature: 0
‑
100 °C
Rotor temperature: 0
‑
100 °C
Voltage precision ± 0.2 V
Output current £
5 mA for specified precision
Normal status output:
Type
Open collector transistor plus pull up resis-
tor. Refer to Figure: Interface circuits for
nEXT turbo pump controllers .
< Normal speed (default 80%)
Off (2.2 k
W
pull up to 12 V d.c.)
³
Normal speed
On (< 0.8 V d.c. sinking 20 mA)
Current rating 20 mA to 0 V
Voltage rating
28.8 V d.c. maximum external pull up volt-
age
Fail status output:
Type
Open collector transistor plus pull up resis-
tor. Refer to Figure: Interface circuits for
nEXT turbo pump controllers .
Fail Off (3.3 k
W
pull up to 12 V d.c.)
OK
On (< 0.1 V d.c. sinking 1.7 mA,
< 0.8 V d.c. sinking 20 mA)
Current rating 20 mA to 0 V
Voltage rating
28.8 V d.c. maximum external pull up volt-
age
*
Mating half of connector not supplied.
Refer to the table that follows for the logic interface connector pins for the electrical
connections.
07/2021 - ©Edwards Limited Page 27 B8G000880_E
B8G000880_E - Technical data