Edwards nEXT 55, Instruction Manual

Page: 26 / 116

Refer to the manufacturer's Vacuum Pump and Vacuum Safety manual P40040100 for
safety information related with the specification, design and operation of vacuum
pumps and vacuum systems.
The pump can be used to pump the oxygen and water vapour, with the conditions that
follow:
▪ Oxygen - The oxygen concentration must be less than 25% by volume.
▪ Water vapour - Make sure that the water vapour does not condense in the pump.
3.8 Materials exposed to gases pumped
The materials and component types that are exposed to the gases pumped are:
▪ Aluminium alloys
▪ Stainless steels
▪ Fluoroelastomer and O
‑
rings
▪ Hydrocarbon lubricant
▪ Felt
▪ Rare earth magnets
▪ Silicon nitride
▪ Titanium
▪ PTFE
3.9 Logic interface connector
The pump has a 15
‑
way logic interface connector at the end of the logic interface cable.
Use an applicable connector mating half (not supplied) to connect the nEXT pump to the
customer equipment. Refer to the table that follows for the connector mating half type.
Table 6
Logic interface technical data
Logic interface item
Connector
*
15
‑
way D
‑
type male
nEXT pumps electrical supply:
Permitted voltage range (with ripple)
24 V d.c. to 48 V d.c. +5%, -10%
(21.6 to 50.4 V d.c.)
Maximum voltage ripple 0.5 V r.m.s.
Fuse rating
T6ALxxxV to T10ALxxxV for 24 V d.c. supply
T4ALxxxV to T10ALxxxV for 48 V d.c. sup-
ply.
Use an IEC/UL/CSA pre-approved fuse rat-
ed ≥ 60 V d.c.
Limit of power supply:
Factory default setting
Refer to Pump model description on page
11
Maximum power limit 120 W
Minimum power limit 50 W
Precision of the power regulation ± 10 W
07/2021 - ©Edwards Limited Page 26 B8G000880_E
B8G000880_E - Technical data