SLP KONSTANTER Series SLP 120 / 240 / 320 ... - Gossen-Metrawatt

SLP KONSTANTER Series SLP 120 / 240 / 320 

Laboratory Power Supplies 3-348-796-03 

6/5.11 

• Very short response times thanks to BET technology 

(bidirectional energy transformation) 

• Auto-ranging output with 120 W, 240 W or 320 W 

• Output power is doubled in short-time operating range 

• Remote sensing 

• Minimum residual ripple 

• Very good dynamic control parameters 

• Output ON / OFF function 

• Output terminals at front and rear panels 

• Master-slave operation for parallel and series connection 

• Protection against excessive temperature 

• Minimal power loss 

• Compact design and minimum weight 

Application 

The SLP-KONSTANTER series (Single Output Laboratory Power 

Supplies) includes single-channel laboratory power supplies for 

universal use in research and development, production, training 

and service. 

The instruments are capable of maintaining either constant voltage 

or constant current levels, and are deliver 120 W, 240 W or 

320 W of nominal power over a wide range thanks to the autoranging 

output. 

Setpoint Configuration 

Precision manual adjustment of voltage and current is accomplished 

with ten-turn potentiometers whose setting ranges Ulim 

and Ilim can be limited with the help of a screwdriver, in order to 

prevent inadvertent adjustment to undesirably high values. 

Display 

Two large, 3½ place digital LED displays indicate the measured 

output voltage and output current. Furthermore, they can be 

switched to setpoint display as well, which is especially advantageous 

for current adjustment. 

Control mode displays in the characteristic curve field indicate 

respective operating conditions. 

GMC-I Messtechnik GmbH 

QUALITY MANAGEMENT SYSTEM 

DQS Certified per 

DIN EN ISO 9001:2008 

Reg. No. 446534QM08 UM 

Outputs 

Floating outputs are available at both front and rear panels. 

Activation or deactivation is accomplished by pressing a key, or 

with a signal to the integrated analog interface which is included 

as standard equipment. 

As soon as sensor cables are connected to the terminals, the 

KONSTANTER is automatically switched to remote sensing. 

Housing 

The quiet, temperature controlled fan prevents unnecessarily high 

noise levels in working areas. 

The rugged metal housing is closed at both top and bottom, and 

is equipped with mounting feet and a tilt stand at the rear. 

Several units can be quickly and easily fastened to one another 

for the creation of multi-channel units, or can be installed to a 19" 

rack with the appropriate mounting sets. 

Only one electrical outlet is required for the supply of mains power 

to multi-channel units.


Laboratory Power Supplies 

Output Working Range 

U/V 

Unom. 0.5 

U nom. 

0 

Analog Interface 

P nom. Short-Time 

Operating Range 

0.5 I nom. 

I nom. 

Connection 11-pole plug-in terminal strip 

Reference potential Output negative pole 

floating TRG input 

Connector Pin Assignments: 

PIN Designation Function 

1 SIG1 OUT status signal output for input ON / OFF 

(open collector, max. 30 V – / 20 mA) 

2 SIG2 OUT status signal output control mode CV / CC 

(open collector, max. 30 V – / 20 mA) 

3 TRG IN + digital control input for input ON / OFF 

4 TRG IN – 

(low: < 1 V, high: 4 ... 26 V), floating input 

5 +15 V auxiliary voltage: +15 V / max. 40 mA 

6 AGND 

reference point connected to –output with 

reversible fuse 

7 Uset – analog, inverted voltage control input 

(0 ... –5 V corresponds to 0 ... Unom. , Ri = 10 kΩ) 

8 Uset+ analog voltage control input 

(0 ... +5 V corresponds to 0 ... Unom., Ri = 10 kΩ) 

9 Iset+ analog current control input 

(0 ... +5 V corresponds to 0 ... Inom., Ri = 10 kΩ) 

10 U-MON output voltage measurement output 

(0 ... 10 V corresponds to 0 ... Unom. , Ri = 9.8 kΩ 

11 I-MON output current measurement output 

0 ... 10 V correspond to 0 ... Inom., Ri = 9.4 kΩ) 

I/A 

Voltage 

Setting Range 

Current 

Setting Range 

Applicable Regulations and Standards 

IEC 61010-1/EN 61010-1/ 

VDE 0411-1 

VDE 0160:1988 + A1:1989 

class W1 

EN 60950:1992 

VDE 0805:1990 

EN 60529 

VDE 0470 Part 1 

Safety requirements for electrical equipment 

for measurement, control and laboratory use 

– General requirements 

Equipment of power systems with electronic 

components 

Safety of IT systems 

Test instruments and test procedures 

– Protection provided by enclosures (IP code) 

IEC 68-2-6:1990 Vibration resistance 

IEC 68-2-27:1989 Impact resistance 

EN 61326-1:1997 Electromagnetic compatibility (CEM) 

+ A1: 1998 

Product standard 

EN 55022:1998 class A 

EN 61000-4-2:1995 

EN 61000-4-3:1996 + 

A1:1998 

EN 61000-4-4:1995 

EN 61000-4-5:1995 

EN 61000-4-6:1996 

EN 61000-4-11:1994 

Electromagnetic Compatibility (CEM) 

Generic standard interference emission – 

industrial sector 

Electromagnetic Compatibility (CEM) 

Generic standard interference immunity – 

industrial sector 

2 GMC-I Messtechnik GmbH

Dimensional Drawing (benchtop instrument) 

88 

14 

All dimensions in mm 

40V 40V/6A 

KONSTANTER SLP 240-40 

240W 

CV 

20V/12A 

CC 

12A 

POWER 

OUTPUT 

ON 

OFF 



221.5 

Volt Amp 

Ulim DISPLAY Ilim 

Uset/Iset 

Uset 

Iset 

397.5 

380.5 

SIG1 OUT 

SIG2 OUT 

TRG IN 

+ TRG IN 

15V 

AGND 

Uset 

Uset 

Iset 

U-MON 

I-MON 

- 

+ 

- 

+ 

+ 

ANALOG INTERFACE 

230V 50-60Hz 

FUSE T4/250V 

GMC-I Messtechnik GmbH 3 

SENSE 

- 

- 

+ SENSE 

+ 

OUTPUT 

Power Supply Outlet 

for Use with Multiple 

Units 

Mains Power 

Input



Characteristic Values, 120 W Series 

Unless otherwise indicated, all entries represent maximum values and are valid within an operating temperature range of 0 to 50° C, the 

nominal power range and a line voltage range of 230 V ± 10% after a warm-up period of 30 minutes. 

Description (abbreviated designation) SLP 120-20 SLP 120-40 SLP 120-80 

Type 32 N 20 R 10 32 N 40 R 6 32 N 80 R 3 

Nominal Output Data Voltage Setting Range 0 ... 20 V 0 ... 40 V 0 ... 80 V 

Current Setting Range 0 ... 10 A 0 ... 6 A 0 ... 3 A 

Continuous Power at Tu ≤ 40° C max. 120 W max. 120 W max. 120 W 

Short-Time Rating for t < 90 s / Tu ≤ 25° C max. 200 W max. 240 W max. 240 W 

Output Operating Characteristics 

Current Derating at Tu > 40° C – 0.25 A / K – 0.15 A / K – 0.07 A / K 

Overall Setting Tolerance at 23 ± 5° C 

Voltage 0.2 % + 50 mV 

0.2 % + 150 mV 0.2 % + 250 mV 

with Reference to 3½ Place Setpoint Display 

including System Deviation for Load / Line 

Current 0.5 % + 45 mA 

0.5 % + 35 mA 

0.5 % + 20 mA 

Static System Deviation 1) 

at 100% Load Variation 1) 

Voltage 

Current 

15 mV 

20 mA 

10 mV 

10 mA 

10 mV 

10 mA 


at 10% Line Voltage Variation 1) 

Voltage 

Current 

5 mV 

8 mA 

5 mV 

5 mA 

5 mV 

5 mA 

Residual Ripple 1) Voltage (10 Hz ... 10 MHz) 

Current (10 Hz ... 1 MHz) 

10 mVeff 25 mAeff 10 mVeff 20 mAeff 10 mVeff 10 mAeff Common-Mode Interference (10 Hz ... 1 MHz) 0.5 mA eff 0.5 mA eff 0.5 mA eff 

Settling Time (voltage) 

with Sudden Load Variations of 10 to 90% Inom. Under and Overshooting with 

Sudden Load Variations of 50 A / ms 

Response Time (voltage) 

with Setpoint Change 0 → 100% 

with Setpoint Change 100% → 0 

Response Time (current) 



Measurement Value Display (3½ place) 

Tolerance 

Δ I = 80% 

Tolerance 

Open-Circuit / Nominal Load 


Tolerance 

Short-Circuit / Nominal Load 


Measuring Resolution Voltage 

Current 

Measuring Accuracy at 23 ± 5° C 

with Reference to the respective Measurement Value 

Protective Functions 

1) Indicated values are increased by a factor of approximately 1.2 within a mains input voltage range of –10% to –15%. 

4 GMC-I Messtechnik GmbH 

40 mV 

200 μs 

80 mV 

200 μs 

80 mV 

200 μs 

Δ I = 80% 400 mV 400 mV 800 mV 

Voltage 

Current 

40 mV 

1 ms / 1 ms 

1 ms / 1 ms 

100 mA 

< 5 ms / < 5 ms 

< 5 ms / < 5 ms 

10 mV 

10 mA 

0.15 % + 25 mV 

0.5 % + 30 mA 

80 mV 

1 ms / 1 ms 

1 ms / 1 ms 

60 mA 

< 5 ms / < 5 ms 

< 5 ms / < 5 ms 

100 mV 

10 mA 

0.2 % + 120 mV 

0.5 % + 25 mA 

160 mV 

4 ms / 4ms 

4 ms / 4ms 

30 mA 

< 10 ms / < 10 ms 

< 10 ms / < 10 ms 

100 mV 

10 mA 

0.2 % + 150 mV 

0.5 % + 20 mA 

Output Overvoltage Protection Threshold 25 ± 1 V 50 ± 2 V 100 ± 4 V 

Protection against Pole Reversal – Load Capacity Continuous 10 A 6 A 3 A 

Reverse Voltage Resistance 

General 

Continuous 40 V 80 V 100 V 

Power Supply 1) 

at Nominal Load 230 V~ +10 / −15 % 230 V~ +10 / −15 % 230 V~ +10 / −15 % 

in Standby Mode 47 ... 63 Hz 

47 ... 63 Hz 

47 ... 63 Hz 

Power Consumption at max. Short-Time Power 280 VA; 180 W 

280 VA; 150 W 

280 VA; 170 W 

at Nominal Load 45 VA; 15 W 

45 VA; 15 W 

45 VA; 15 W 

Typical 

450 VA 

500 VA 

500 VA 

Efficiency at Nominal Load > 70 % > 80 % > 80 % 

Switching Frequency in Standby Mode 

at max. Short-Time Power 

200 kHz 200 kHz 200 kHz 

Article Number K220A K221A K222A






Description (abbreviated designation) SLP 240-20 SLP 240-40 SLP 240-80 

Type 32 N 20 R 20 32 N 40 R 12 32 N 80 R 6 

Nominal Output Data Voltage Setting Range 0 ... 20 V 0 ... 40 V 0 ... 80 V 

Current Setting Range 0 ... 20 A 0 ... 12 A 0 ... 6 A 

Continuous Power at Tu ≤ 40° C max. 240 W max. 240 W max. 240 W 

Short-Time Rating for t < 90 s / Tu ≤ 25° C max. 320 W max. 360 W max. 360 W 


Current Derating at Tu > 40° C – 0.5 A / K – 0.3 A / K – 0.15 A / K 


Voltage 0.2 % + 100 mV 

0.2 % + 150 mV 0.2 % + 250 mV 




0.5 % + 45 mA 

0.5 % + 35 mA 



Voltage 

Current 

25 mV 

30 mA 

18 mV 

30 mA 

18 mV 

15 mA 



Voltage 

Current 

5 mV 

8 mA 

5 mV 

8 mA 

5 mV 

5 mA 



15 mVeff 50 mAeff 15 mVeff 25 mAeff 15 mVeff 20 mAeff Common-Mode Interference (10 Hz ... 1 MHz) 0.5 mA eff 0.5 mA eff 0.5 mA eff 











Tolerance 

Δ I = 80% 

Tolerance 



Tolerance 




Current 





GMC-I Messtechnik GmbH 5 

40 mV 

400 μs 

80 mV 

200 μs 

160 mV 

200 μs 

Δ I = 80% 400 mV 400 mV 800 mV 

Voltage 

Current 

40 mV 

1 ms / 1 ms 

1 ms / 1 ms 

200 mA 

< 5 ms / < 5 ms 

< 5 ms / < 5 ms 

10 mV 

10 mA 

0.2 % + 50 mV 

0.5 % + 25 mA 

80 mV 

1 ms / 1 ms 

1 ms / 1 ms 

120 mA 

< 5 ms / < 5 ms 

< 5 ms / < 5 ms 

100 mV 

10 mA 


0.5 % + 30 mA 

160 mV 

4 ms / 4ms 

4 ms / 4ms 

60 mA 

< 10 ms / < 10 ms 

< 10 ms / < 10 ms 

100 mV 

10 mA 


0.5 % + 25 mA 

Output Overvoltage Protection Threshold 25 ± 1 V 50 ± 2 V 100 ± 4 V 

Protection against Pole Reversal – Load Capacity Continuous 20 A 12 A 6 A 


General 

Continuous 40 V 80 V 100 V 

Power Supply1) at Nominal Load 230 V~ +10 / −15 % 230 V~ +10 / −15 % 230 V~ +10 / −15 % 


47 ... 63 Hz 

47 ... 63 Hz 


500 VA; 340 W 

500 VA; 340 W 


45 VA; 15 W 

45 VA; 15 W 

Typical 

620 VA 

690 VA 

690 VA 

Efficiency at Nominal Load > 68 % > 70 % > 70 % 



200 kHz 200 kHz 200 kHz 

Article Number K230A K231A K232A






Description (abbreviated designation) SLP 320-32 

Type 32 N 32 R 18 

Nominal Output Data Voltage Setting Range 0 ... 32 V 

Current Setting Range 0 ... 18 A 

Continuous Power at Tu ≤ 40° C max. 320 W 

Short-Time Rating for t < 90 s / Tu ≤ 25° C max. 430 W 


Current Derating at Tu > 40° C – 0.5 A / K 


Voltage 0.2 % + 150 mV 






Voltage 

Current 

30 mV 

40 mA 



Voltage 

Current 

10 mV 

20 mA 



30 mVeff 50 mAeff Common-Mode Interference (10 Hz ... 1 MHz) 0.5 mA eff 











Tolerance 

Δ I = 80% 

Tolerance 



Tolerance 




Current 





6 GMC-I Messtechnik GmbH 

64 mV 

200 μs 

Δ I = 80% 400 mV 

Voltage 

Current 

64 mV 

1 ms / 1 ms 

1 ms / 1 ms 

180 mA 

< 5 ms / < 5 ms 

< 5 ms / < 5 ms 

100 mV 

10 mA 


0.5 % + 40 mA 

Output Overvoltage Protection Threshold 40 ± 1 V 

Protection against Pole Reversal – Load Capacity Continuous 20 A 


General 

Continuous 64 V 

Power Supply1) at Nominal Load 230 V~ +10 / −15 % 




Typical 

770 VA 

Efficiency at Nominal Load > 69 % 



200 kHz 

Article Number K234A

Ambient Conditions 

Vibration Resistance IEC 68-2-6: 1990 

10 ... 55 Hz, 0.3 mm, 1 oct. / min. 

3 x 30 min. 

Impact Resistance IEC 68-2-27: 1989 

15 gr., 11 ms, semi-sinusoidal, 

3 x 6 impacts 

Temperature Range operation: 0 ... 50° C at > 40° C current 

derating 

storage: –25 ... +75° C 

Humidity operation: ≤ 75% relative humidity, 

no condensation allowed 

Cooling with built-in fan 

air intake: side panel 

air outlet: rear panel 

Power Supply 

Connectors In: 10 A IEC inlet plug connector 

Out: 10 A IEC inlet socket connector, 

no switch, no fuse 

Line Voltage 230 V~, +10 / –15%, 47 ... 63 Hz 

Power Consumption see Characteristic Values 

Inrush Current max. 50 A s 

Mains Fusing 1 ea. T 4 A / 250 V (6.3 x 32 mm, UL) 

internal: 1 ea. T 5 A / 250 V (5 x 20 mm) 

Output 

Connectors 

Output front panel: 2 ea. 4 mm safety jacks 

rear panel: 6-pin plug-in terminal strip 

Sensor rear panel: 6-pin plug-in terminal strip 

Regulator primary switched-mode regulator with BET 

Operating Modes adjustable constant voltage / constant current 

source with automatic sharp transition 

Output Isolation floating output with “protective separation” 

from the mains inlet, max. allowable potential 

output–ground: 120 V, 

capacitance output–ground (housing): 60 nF 

Electrical Safety 

Safety Class I 

Overvoltage 

Category: II for mains inlet 

I for output and interface 

Contamination Level 2 

Earth Leakage 

Current typ. 2.5 mA 

Electrical Isolation test voltage 

Mains / Output–PE 1.35 kV∼ 

Mains–Output 2.7 kV∼ (type test: 3.7 kV~7 kV~) 



Electromagnetic Compatibility CEM 

Product standard EN 61326-1:1997 + A1: 1998 

Interference Emission EN 55022:1998 class A 

Interference Immunity EN 61000-4-2:1995 Feature A 

EN 61000-4-3:1996 + A1:1998 

Feature B 

EN 61000-4-4:1995 Feature B 

EN 61000-4-5:1995 Feature B 

EN 61000-4-6:1996 Feature B 

EN 61000-4-11:1994 Feature B 

Mechanical Design 

Protection IP 20 for housing in accordance with 

IEC 529: 1989 

EN 60529: 1991 

VDE 0470-1: 1992 

Type benchtop instrument, 

suitable for rack mounting 

Dimensions 

(W x H x D) benchtop unit: 221.5 x 102 x 397.5 mm 

19" rack unit: ½19" x 2 standard height 

units x 400 mm 

Weight approx. 2.8 kg 

GMC-I Messtechnik GmbH 7



Accessories 

Description Comment Article No. 

19" Adapter, 1 x 32 N Required for mounting 1 type 32 N ... 

instrument to a 19" rack K990A 

19" Adapter, 2 x 32 N Required for mounting 2 type 32 N ... 

instruments to a 19" rack K990B 

Mains Jumper Cable, 

0.4 meters long 

Order Information 

Edited in Germany • Subject to change without notice • A pdf version is available on the internet 

GMC-I Messtechnik GmbH 

Südwestpark 15 

90449 Nürnberg • Germany 

The cable is equipped with one 10 A inlet 

connector plug and one 10 A inlet connector 

socket. 

Used for cascading mains power when several 

instruments are mechanically connected to a 

single multi-channel unit. The system thus 

requires only one mains outlet. K991A 

Description (Abbreviated Designation) Type Article No 

Konstanter SLP 120-20 32 N 20 R 10 K220A 







Phone +49 911 8602-111 

Fax +49 911 8602-777 

E-Mail info@gossenmetrawatt.com 

www.gossenmetrawatt.com

SLP KONSTANTER Series SLP 120 / 240 / 320 ... - Gossen-Metrawatt

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