SAES NEG POWER - Main Features of NEG POWER; Electronic Circuit Features; Output Power Modules

M.HIST.0101.23 R2 Page 5 of 36 January, 26
th
2021
2.2. MAIN FEATURES
The main features of the new NEG POWER are the following:
- contemporary activation/conditioning up to 4 NEG pumps
- automatic recognition of the cable length
- local control by user friendly touch screen controller
- remote control by RS232/RS485 interface with Modbus protocol (RTU)
- remote control by TCP/IP network interface
- pump temperature monitoring and thermoregulation
- automatic power regulation for different pump configuration
- diagnostic features (open/short connection, broken thermocouple, broken heating filament,
overheating control, ...)
- pump temperature limiter: for pumps equipped with a thermocouple, a limit on the maximum
temperature can be set by limiting the maximum power.
- stand-by mode: if the instrument is not operated for long time, it switches to stand-by mode. In
this state, the power consumption of the instrument is reduced. The stand-by mode can be ended
by a touch on the display of the NEG POWER.
2.3. Electronic circuit features
NEG POWER is a switching power supply, with an adjustable voltage output from 0 to 110 V. The
instrument receives mains voltage (110÷240 VAC, 50÷60 Hz), converts it to DC voltage and
supplies the getter pump by means of a microprocessor-based electronic control card.
The unit has a ON/OFF button to turn on/off the instrument, a touch screen display that allows a
user to interact with it, and a LAN connector for remote control by standard network interface.
The unit has, on the back, four OUTPUT pump connectors, two fans, RS485 serial interface
connector, IN/OUT interface connector and the instrument input for mains power supply
(MAININPUT) IEC 16 A plug.
External interlock alarms (alarm condition generated by the user’s vacuum system) are present,
one for each current output (on IN/OUT interface connector).
If the getter pump is equipped with a thermocouple, NEG POWER shows its temperature on the
display.
2.4. Output power modules
NEG POWER can be equipped with two types of modules: standard and low power modules.
Standard power modules of 700 W are can be used to control SAES NEG pumps requiring higher
power during the activation.
Low power modules of 150 W can be also installed in the NEG POWER to work in the low range of
power with the smallest SAES NEG pumps requiring low values of power / voltage / current with a
precision around ± 0.1 V.
The two types of module can be mixed up in different slots in the same instrument.