Edwards nEXT 55, Instruction Manual

Page: 7 / 116

List of Figures
Figure 1: Pump model description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 2: Dimensions - nEXT85 ISO63. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 3: Dimensions - nEXT85 CF63. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 4: Dimensions - nEXT85 ISO100. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 5: Dimensions - nEXT85 DN40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 6: Typical base view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 7: Dimensions - nEXT55D ISO63 NW16 80W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 8: Dimensions - nEXT55D CF63 NW16 80W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 9: Typical base view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 10: Maximum allowed rate of pressure rise during venting: pressure against time
(with pump initially at full rotational speed). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 11: Maximum relative humidity to avoid condensation with water cooling. . . . . . 24
Figure 12: Interface circuits for nEXT turbo pump controllers. . . . . . . . . . . . . . . . . . . . . . . 29
Figure 13: Valve connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 14: nEXT85 pumping speed versus inlet pressure performance graph. . . . . . . . . . . 33
Figure 15: nEXT85 compression ratio versus backing pressure graph. . . . . . . . . . . . . . . . . 33
Figure 16: nEXT55 pumping speed versus inlet pressure performance graph. . . . . . . . . . . 37
Figure 17: nEXT55 compression ratio versus backing pressure graph. . . . . . . . . . . . . . . . . 37
Figure 18: Typical pumping system with a nEXT pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 19: Allowable pump orientation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 20: Logic interface connections - parallel control. . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Figure 21: Motor controller status information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Figure 22: Logic interface connections - RS232 serial control. . . . . . . . . . . . . . . . . . . . . . . . 51
Figure 23: Logic interface connections - RS485 serial control. . . . . . . . . . . . . . . . . . . . . . . . 51
Figure 24: Conceptual diagram for multi-drop connection using RS232 interface. . . . . . . 57
Figure 25: RS485 multi-drop connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Figure 26: Logic interface connection - mixed parallel and serial operation. . . . . . . . . . . . 59
Figure 27: Auxiliary interface connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Figure 28: Serial and parallel control flowchart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Figure 29: Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
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