Edwards nEXT 55, Instruction Manual

Page: 29 / 116

Figure 12 Interface circuits for nEXT turbo pump controllers
3.10 Motor controller auxiliary connector socket
The pump has a 4-way auxiliary connector socket at the side of the motor controller.
The mating plug for the connector is pre-installed to a number of accessories or
available as an accessory. Refer to Accessories on page 105.
The connector supplies the power to the vent valve or a fan. The connector is shown in
Figure: Valve connector , with the polarity of the pins marked, when the vent valve or fan
is set to on.
The auxiliary connector output is controlled to 24 V d.c. to control the accessories, even
when the pump is in operation from a 48 V d.c. supply and is protected from the
overload and short circuits. If the auxiliary load current becomes more than the value
07/2021 - ©Edwards Limited Page 29 B8G000880_E
B8G000880_E - Technical data