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6

Important Details

Technical specifications

Unpacking

Check the contents after unpacking for missing parts or 
accessories and the unit for any apparent mechanical  damages 
and loose parts inside the unit. In case of a transport damage 
please inform the seller immediately.  In that case do not take 
the unit into operation.

Commissioning

For safety reasons the unit may only be operated at a mains 
power connection provided with a safety ground or via an 
insulating transformer safety class 2. The air in- and outlets 
on the back side may never be obstructed in order to ensure 
proper cooling.

Mains power voltage selection and fuse replacement

Before putting the unit into operation make sure that the 
available mains power voltage and the setting of the input 
voltage selector on the back have the same value (115 or 
230 V). If it is required to adjust the input selector to the mains 
power voltage value, an input fuse with an appropriate voltage 
value has to be 

fi

 t as well. The fuse may only be changed or 

replaced whilst the unit is disconnected from the mains power 
line. The fuse and the respective values are shown on the back 
side of the unit.

General

The power supply series EA-PS 3000B (600 – 650 W output 
power) is of primary switching technology and is provided with 
a Power Factor Correction circuit (i.e. PFC, sinusoidal input 
current). This series is distinguished by its compact built-up, 
lightweight, excellent electrical values and extended operational 
features, such as 

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 ne and coarse adjust of output voltage and 

current, preset function for output voltage and overvoltage 
protection (OVP) and the display of various operation 
statuses. Cooling is provided via a temperature controlled fan. 
Furthermore, this series features an analogue interface (0-10V) 
for remote control and can, in addition, be 

fi

 tted with an external 

USB interface adapter (EA-UTA12).

Controls and displays

Output voltage and current can be preset through coarse and 

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 ne potentiometers placed on the front panel or via 0…10V 

through the analogue interface. The respective values are 
shown on the 3-digit 7-segment LED meters or via the analogue 
interface (0…10V).
Whilst pushing the preset button, the preset current and the 
preset overvoltage protection value (i.e. OVP, setting through 
the 10-turn potentiometer on the front), are displayed on the 
LED meters.
The regulation mode is indicated via two LEDs.
LED CV = constant voltage mode
LED CC = constant current mode
Furthermore, the LEDs on the front panel show the following 
operation conditions. 
LED Standby 

= Shut down by analogue interface

LED OVP  

= Shut down by overvoltage (OVP)

LED OT  

= Shut down by overheating (OT)

LED External   = Analogue interface active

Output terminals

The output is provided through two safety sockets on the front 
panel and in addition via screw terminals on the rear side. The 
connections for “remote sensing” .i.e. to compensate the voltage 
loss on the load wires, are placed on the rear side as well.

Input

Voltage

88...264V

Frequency

50 / 60Hz

Fuse

>0.99

T10A

Output

Voltage
- Fine adjustment range

0...32V

- Adjustment range

approx. 1.6V

- Stability 0...100% Load

<20mV

- Sta10% U

IN

<2mV

- Ripple

<10mV

rms

- Regulation 10...90% Load

<3ms

- Regulation 90...10% Load

<3ms

Current
- Adjustment range

0...20A

- Fine adjustment range

approx. 1A

- Stability 0...100% U

OUT

<50mA

- Ripple

<5mA

rms

Protection
- Overvoltage protection (OVP)

0...35.2V

- Overcurrent protection (CC)

0...20A

- Overtemperature protection (OT)

Output shutdown

Control elements

Voltage adjustment

Potentiometers coarse/

fi

 ne

Current adjustment

Potentiometers coarse/

fi

 ne

Overvoltage protection

Trimmer 10 turns

Preset OVP / Current

Pushbutton (Preset)

Indicators

Voltage 

LED 7 segment, 3 digits

Current

LED 7 segment, 3 digits

Overvoltage protection

LED 7 segment, 3 digits

Status indication by

LEDs

Analogue interface

Inputs

Signal

Voltage 0...100%

0...10V

Current 0...100%

0...10V

Remote Control On/Off (SEL-

open collector

Output On/Off (Standby)

open collector

Outputs

Signal

Voltage 0...100%

0...10V

Current 0...100%

0...10V

Supply voltage (+VCC)

12...15V 100mA

Reference voltage (VREF)

10.0V 5mA

Overvoltage indicator (OVP)

open collector

Overtemperature indicator (OT)

open collector

Control mode (CV/CC)

open collector

Miscellaneous

Operating temperature

0...40°C

Storage temperature

-20...70°C

Relative humidity

<80% w/o condensation

Dimensions (WxHxD)

240x120x285mm

Installation dimensions (WxHxD)

240x132x325mm

Accessories

USB interface

UTA12

11

Attention! La masse du signal (GND) de l’interface analogique et la sortie négative (-) sont reliées 
entre elles de manière interne. Si ces deux conducteurs dont le câblage a été effectué séparément 
sont connectés à une unité de commande  externe (automate programmable PLC, p. ex.) et à un 
consommateur de courant, il faut absolument que ces conducteurs ne soient pas directement reliés 
à cet endroit car il peut se produire une répartition du courant par l’intermédiaire de la masse du 
signal de commande GND qui en règle générale est une connexion très mince !
Le problème n’apparaît pas si un isolement galvanique des signaux de commande est réalisé vers 
la sortie, p. ex. en utilisant une interface CAN ou IEEE  ou encore un ampli

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 cateur de signaux.

Une des solutions à ce problème est illustrée ci-dessous. Pour mesurer la tension au niveau du consommateur 
connecté, le dispositif de compensation de chute de tension « Remote Sense » est câblé.

Indication d‘emploi importante

Correcte

Erronée

Summary of Contents for PS 3032-20 B

Page 1: ...Labornetzgerät Laboratory Power Supply Alimentation de Laboratoire PS 3032 20 B 0 32V 0 20A Art Nr 35320177 ...

Page 2: ......

Page 3: ...LED Anzeigen der eingestellte Strom sowie der über einen 10 Gang Trimmer auf der Front eingestellte Überspannungsschutz OVP abgelesen und präzise eingestellt werden Die Betriebsart in der das Gerät im Moment arbeitet wird über zwei LEDs angezeigt Hier steht CV für Spannungsregelung und CC für Stromregelung Weitere LEDs zeigen den Zustand des Gerätes an LED External Analogschnittstelle aktiv LED OT...

Page 4: ... des Gerätes abgeschaltet Dies wird dann über die LED OT Over temperature angezeigt Schnittstelle Die serienmäßig vorhandene analoge Schnittstelle ermöglicht es dem Anwender das Gerät mit analogen Signalen zu steuern und zu überwachen Das optional erhältliche Interface UTA12 kann die Geräte direkt vom PC aus mittels USB Anschluß komplett steuern Die benötigte Software bzw Kabel sind im Lieferumfan...

Page 5: ...tch Voltage rotary control coarse Display voltage Preset OVP Voltage control mode indication Voltage rotary control fine Pushbutton Preset OVP current Status indication Analogue interface Adjustment overvoltage protection Current rotary control coarse Current control mode Display current Current rotary control fine Grounding connector Output terminals 5 Eine mögliche Lösung ist unten zusehen Um di...

Page 6: ... Shut down by overvoltage OVP LED OT Shut down by overheating OT LED External Analogue interface active Output terminals The output is provided through two safety sockets on the front panel and in addition via screw terminals on the rear side The connections for remote sensing i e to compensate the voltage loss on the load wires are placed on the rear side as well Input Voltage 88 264V Frequency 5...

Page 7: ...mA Open Collector Position de phase Low Extern Low OK Low Arrêt Low OK Low CV Open Local Open Error Open Marche Open Erreur Open CC 7 Technical description General The laboratory power supply series PS3000B is an ideal equipment for the use in R D schools vocational training maintenance and production The attractive design the easy and intuitive handling and the rugged and reliable technology make...

Page 8: ...rtie peuvent être préréglés à l aide de potentiomètres réglage approché et réglage fin situés en face avant ou à l aide de l interface analogique 0 10V en face avant Les valeurs de sortie sont affichées sur les affichages digitaux 2000 points 7 segments ou via l interface 0 10V analogique Pendant le bouton poussoir preset est enfoncé la valeur de préréglage du courant et la valeur de préréglage de...

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