Edwards, nEXT Turbomolecular Pumps, nEXT240, nEXT300 and ...

B800-00-880 Issue B
2.7 Electrical data
nEXT pumps can be driven either by your own system or by the Edwards TIC Turbo Instrument Controller or TIC Turbo
Controller.
If you wish to use your own system, the size of the power supply required depends on your application. The power
limit setting determines how quickly you can ramp up the pump and dictates the size of power supply you will need.
If you have serial communications capability, or have access to an Edwards TIC, you can select the power limit setting
of the nEXT pump. Refer to Table 10 for the maximum power limit settings for nEXT pumps. If your application
requires rapid cycling of the pump, you can achieve faster ramp times if you use a power supply that delivers higher
current, up to a maximum in accordance with Table 10
If you do not have the facility to adjust the power limit setting, you must use a power supply capable of delivering
enough current to meet the Edwards factory default power limit setting, shown in Table 10.
Technical data
If you intend to drive the nEXT pump using an Edwards TIC, be aware that there are several variants. Contact Edwards
to determine which is most suitable for your application.
2.8 Logic interface connector
nEXT pumps have a 15-way logic interface connector on the end of the logic interface cable. The logic interface
connector can be plugged directly into the Edwards TIC Turbo Instrument Controller or TIC Turbo Controller. You
must use a suitable connector mating half (not supplied) to connect the nEXT pump to your own equipment. Refer
to Table 10 for the connector mating half type, to Table 11 for Logic Interface connector pins for the electrical
connections and to Figure 8 for the connector interface circuit diagrams.
Table 10 - Logic interface technical data
Logic interface item
Connector *
nEXT pumps electrical supply:
Allowable voltage range
(including any ripple)
Maximum voltage ripple
Fuse rating
Limit on power drawn from supply.
Factory default setting
Maximum setting
Minimum setting
Accuracy of power regulation
Start and Serial enable control inputs:
Enabled control voltage: low (close)
Disabled control voltage: high (open)
Standby control input
Enabled control voltage: low (close)
Disabled control voltage: high (open)
Analogue Output
15-way D-type male
24 - 48 V d.c. +5%, -10%
(21.6 to 50.4 V d.c.)
0.5 V r.m.s.
10A for 24Vdc supply
5A to 10A for 28Vdc supply
Type 'T' IEC approved or
Time delay fuse UL/CSA approved
160 W
200 W
50W
+/- 10W
0 to 0.8 V d.c. (I out = 0.55 mA nominal)
4 to 26.4 V d.c. (Internal pull up to 6.4 V nominal)
0 to 0.8 V d.c. (I out = 0.29 mA nominal)
4 to 26.4 V d.c. (Internal pull up to 3.2 V nominal)
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