SAES NEG POWER User manual

M.HIST.0101.23 R2 January, 26th 2021
SAES Getters S.p.A. – Italy
www.saesgroup.com
USER MANUAL
NEG POWER
NEG Pump Controller
NEGPOWER
starting ...
* Copy Approved By DCM on 27/01/2021 * Uncontrolled copy when printed

M.HIST.0101.23 R2 Page 2 of 36 January, 26th 2021
The NEG POWER - NEG Pumps Controller power supply serves for operating the NEG (Non
Evaporable Getters) pumps. It is designed to be used indoor in laboratory conditions.
Security provisions
Symbols on the Manual
These symbols appear on the product:
CAUTION
Pay specific attention
to the section
WARNING
After transportation, the device has to be left idle without mains
voltage for at least 3 hours at the laboratory temperature.
WARNING
The use of the instrument for any other purpose than originally intended
may damage the instrument, injure the user and void all warranties.
ATTENTION
High voltage is present inside the instrument and also in the
connectors and cables, which may harmful to the user.
Manipulation of the cables and of the grounding wire is
prohibited while the appliance is in operation.
Likewise, the operation of the instrument without its
protective covers is prohibited.
Protect the device against humidity and against penetration of
conductive objects and liquids into the ventilation slots.

M.HIST.0101.23 R2 Page 3 of 36 January, 26th 2021
INDEX
1.APPLICATION.............................................................................................................4
2.INTRODUCTION.........................................................................................................4
2.1.General description........................................................................................................ 4
2.2.MAIN FEATURES .......................................................................................................... 5
2.3.Electronic circuit features ............................................................................................... 5
2.4.Output power modules ................................................................................................... 5
2.5.NEG POWER: the front panel of the unit ....................................................................... 6
2.6.NEG POWER: the rear panel of the unit........................................................................ 6
2.7.NEG POWER SMALL: the front panel of the unit........................................................... 7
2.8.NEG POWER SMALL: the rear panel of the unit ........................................................... 7
2.9.NEG POWER Dimensions and Weight.......................................................................... 8
2.10.NEG POWER SMALL Dimensions and Weight ............................................................. 8
3.INSTALLATION...........................................................................................................9
3.1.Rack mounting ............................................................................................................... 9
3.2.Electrical connections..................................................................................................... 9
3.3.Cleaning....................................................................................................................... 10
4.MODE OF OPERATION............................................................................................11
4.1.Power on ...................................................................................................................... 11
4.2.The General Menu ....................................................................................................... 11
4.3.The General Setup button............................................................................................ 12
4.4.The Setup Menu........................................................................................................... 15
4.5.The Limit Setup button ................................................................................................. 17
4.6.The SAVE and CANCEL buttons ................................................................................. 18
4.7.The START/STOP buttons........................................................................................... 18
4.8.The recommended settings.......................................................................................... 19
4.9.Heating (Activation/Conditioning) without stop............................................................. 20
4.10.Custom: a Generic Pump for Customer Settings ......................................................... 20
4.11.Alarms .......................................................................................................................... 21
4.12.Alarm history ................................................................................................................ 22
4.13.Information page .......................................................................................................... 22
5.THE OUTPUT CONNECTOR FUNCTION................................................................23
5.1.Pin layout of IN/OUT Interface connector..................................................................... 23
5.2.RS232 / RS485 Interface ............................................................................................ 23
6.Electrical Specifications.............................................................................................24
7.Summary Table of the NEG Pumps controlled by the NEG POWER........................25
8.PRODUCT CONFIGURATIONS AND ACCESSORIES............................................26
8.1.NEG POWER configurations and accessories:............................................................ 26
8.2.Pump cables and accessories:..................................................................................... 27
9.DECLARATION OF CE CONFORMITY....................................................................28
10.INSTRUCTION FOR INSTRUMENT DISPOSAL......................................................29
11.WARRANTY CONDITIONS ......................................................................................30
12.SERVICE...................................................................................................................31
12.1.Sales & Service Locations:........................................................................................... 31
APPENDIX A: Supply cables.............................................................................................32

M.HIST.0101.23 R2 Page 4 of 36 January, 26th 2021
1. APPLICATION
NEG POWER - NEG Pump Controller power supply is designed to operate the MK4 and MK5
NEG pumps series, namely GP SORB AC®, CapaciTorr®, CapaciTorr HV®and NEXTorr®families.
2. INTRODUCTION
2.1. General description
NEG POWER is an electronic unit specifically designed to control the heating and the activation
process of the getter pumps whether they are or aren’t equipped with a thermocouple.
There are two versions: NEG POWER for up to 4 controlled pumps, NEG POWER SMALL
supporting up to 2 pumps only.
NEG POWER can control up to 4 different getter pumps at the same time, with an adjustable DC
voltage output up to 110 V, current up to 10A, power up to 700W.
It has a touch screen display to control all the pumps together and in a very friendly way; it is also
possible to control the NEG POWER by the SAES remote control software.
NEG POWER SMALL is the smaller version of NEG POWER that can control up to 2 different
getter pumps.
Both versions can be equipped with standard 700 W modules or with low power 150 W modules.
(see paragraph 2.4).
The most popular SAES NEG pumps are preset in the software (like the GP SORB AC®, the
CapaciTorr®, CapaciTorr HV®and NEXTorr® families), so that in order to activate the NEG pump
just the pump model must be selected and START button pressed.
Other pumps, not included in the list of presets, can be managed by “custom settings” by choosing
suitable operating parameters.

M.HIST.0101.23 R2 Page 5 of 36 January, 26th 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.

M.HIST.0101.23 R2 Page 6 of 36 January, 26th 2021
2.5. NEG POWER: the front panel of the unit
1. ON/OFF instrument power switch
2. touch screen display
3. LAN connector: RJ45 connector for Ethernet
4. handles for transport
2.6. NEG POWER: the rear panel of the unit
5. instrument MAININPUT IEC 16 A: plug for mains power supply
6. IN/OUT interface connector with INTERLOCKS
7. RS485 serial interface
8. Fan for power modules 1 and 2
9. Fan for power modules 3 and 4
10. OUTPUT 1 pump connector
11. OUTPUT 2 pump connector
12. OUTPUT 3 pump connector
13. OUTPUT 4 pump connector
2
6
11
12
10
13
5
7
89
1
3
4

M.HIST.0101.23 R2 Page 7 of 36 January, 26th 2021
2.7. NEG POWER SMALL: the front panel of the unit
14. touch screen display
2.8. NEG POWER SMALL: the rear panel of the unit
15. instrument MAIN INPUT IEC 16 A: plug for mains power supply
16. ON/OFF instrument power switch
17. IN/OUT interface connector with INTERLOCKS
18. LAN connector: RJ45 connector for Ethernet
19. Fan for power modules 1 and 2
20. OUTPUT 1 pump connector
21. OUTPUT 2 pump connector
14
16
15
18
17
21
20
19

M.HIST.0101.23 R2 Page 8 of 36 January, 26th 2021
2.9. NEG POWER Dimensions and Weight
NEG POWER dimensions 19” rack, 3U, depth 460 mm
NEG POWER weight (with 1 power module) 10 kg
NEG POWER weight (with 2 power modules) 12 kg
NEG POWER weight (with 3 power modules) 13.5 kg
NEG POWER weight (with 4 power modules) 15 kg
2.10. NEG POWER SMALL Dimensions and Weight
NEG POWER SMALL dimensions ½ 19” rack, 3U , depth 445 mm
NEG POWER weight (with 1 power module) 10 kg
NEG POWER weight (with 2 power modules) 12 kg

M.HIST.0101.23 R2 Page 9 of 36 January, 26th 2021
3. INSTALLATION
NEG POWER is designed to be mounted in a 19” standard rack.
Place the instrument away from heat sources. A gap of at least 5 cm must be left between the
sides of the unit and adjacent walls to ensure sufficient air flow to the cooling fan. When the NEG
POWER is installed inside a cabinet, the latter must be provided with vents capable of ensuring
adequate air exchange between the inside and the outside.
NEG POWER SMALL can be used mounted in a rack or also on a desk on its rubber feet.
For use on a desk the socket-outlet shall be installed near the equipment and shall be easily
accessible.
NEG POWER (standard size) can be installed exclusively in a rack and it can be connected to the
main line through the rack (it is not intended for direct connection to AC Mains Supply) and the
rack must be equipped with a disconnecting means (bipolar) from the power supply
3.1. Rack mounting
Insert the instrument in the appropriate space (19” rack 3U according to DIN 41494 standard).
Fix the NEG POWER front panel on the rack columns with four M6 screws.
NEG POWER SMALL is half 19” rack large. It is prepared with lateral holes to fix it on rack with two
brackets.
ATTENTION: the instrument cannot be used in potentially flammable or explosive areas.
ATTENTION: to avoid damages of the electronic circuit use the instrument within the
environment specified conditions.
ATTENTION: do not place the equipment so that it is difficult to operate the disconnecting
device
ATTENTION: no type of fuse or internal component can be replaced or modified by the user.
ATTENTION: do not use accessories which are not supplied or recommended by the
manufacturer.
3.2. Electrical connections
The connections for the pump, the input mains line, the interlock and the external interface are on
the rear panel of the instrument.
Before connecting the unit to the mains supply, make sure that supply voltage is within the range
specified in the section Electrical Specifications.
ATTENTION: protective earthing is required!
Plug the equipment into a supply outlet which has an earth connection.
ATTENTION: use only adequate rated cords to connect instrument to the mains supply

M.HIST.0101.23 R2 Page 10 of 36 January, 26th 2021
3.3. Cleaning
ATTENTION: before starting any cleaning turn the units off and remove all mains.
The units should be cleaned with a damp cloth when necessary.
The use of solvents an aggressive or scouring cleaning agent is not permitted.
Avoid spraying or spilling any type of liquid directly onto the unit.
Before putting the units into operation mode to check them that are thoroughly dry.