Edwards nEXT400 User Manual

List of Figures
Figure
1: Pump model descripon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 2: nEXT240 performance curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 3: nEXT300 performance curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 4: nEXT400 performance curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 5: nEXT 240 dimensions (mm). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 6: nEXT 300 dimensions (mm). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 7: nEXT 400 dimensions (mm). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 8: Max allowed rate of pressure rise during venng: pressure against me (pump
inially at full speed). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 9: Interface circuits for nEXT turbo pump controllers. . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 10: Controller connector showing pin numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 11: Typical pumping system with a nEXT pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 12: Installaon orientaon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Figure 13: Logic interface connecons - parallel control. . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 14: Controller status informaon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 15: Logic interface connecons - RS232 serial control. . . . . . . . . . . . . . . . . . . . . . . . 49
Figure 16: Logic interface connecons - RS485 serial control. . . . . . . . . . . . . . . . . . . . . . . . 49
Figure 17: Conceptual diagram for mul-drop connecon using RS232 interface. . . . . . . 51
Figure 18: RS485 mul-drop connecon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Figure 19: Logic interface connecon - mixed parallel and serial operaon. . . . . . . . . . . . 57
Figure 20: Maximum relave humidity to avoid condensaon with water cooling. . . . . . 62
Figure 21: Serial and parallel control owchart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Figure 22: nEXT exploded accessories view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Figure 23: nEXT exploded accessories view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
04/2022 - ©Edwards Limited
Page 7B80000880_G

Edwards nEXT400 Specifications

General

Brand	Edwards
Model	nEXT400
Category	Water Pump
Language	English