These operating instructions describe devices as from
firmware version 005, see chapter 2.4.1.
2GMC-I Messtechnik GmbH
1Initial Inspection – Warnings
Attention!
!
Warning!
Warning!
Warning!
Warning!
Warning!
Attention!
!
!
When unpacking the instrument, make sure that the
KONSTANTER and all included accessories are fully intact and
have not been damaged during transport.
Unpacking
• Other than the usual care exercised in handling electronic
equipment, no additional precautions are required when
unpacking the instrument.
• The KONSTANTER is delivered in recyclable packaging, which
provides for adequate protection during transport as substantiated by testing. If the instrument is repacked at a later point
in time, the same packaging or its equivalent must be used.
Visual inspection
• Compare the order number or type designation included on
the packaging and/or the serial plate with the particulars
shown in the shipping documents.
• Make sure that all accessory components have been included
(seechapter 14 “Options and Accessories”).
• Inspect the packaging, as well as mechanical instrument and
accessory components for possible transport damage.
Complaints
If damage is discovered, immediately file a claim with the freight
forwarder (save the packaging!). If other defects are detected or in
the event that service is required, inform your local representative,
or contact us directly at the address included on the last page of
this handbook.
Use for Intended Purpose
Use of the KONSTANTER for its intended purpose is only fulfilled if
the instrument is used in accordance with the stipulations set
forth in the respective operating instructions, and is operated
within the specified power limits. The Konstanter may only be
used by persons with appropriate technical knowledge, or who
have received appropriate instruction.
In order to prevent danger during use, shock-proof connector
cables must be used when connecting power consumers. The
KONSTANTER’s output values (U, I) must be adjusted such that
no danger of overloading or destruction exists for the connected
power consumer.
Only then can the safety of the user, the instrument and the
device under test or the power consumer be assured.
Warnings and Safety Precautions
The KONSTANTER has been manufactured and tested in accordance with the electrical safety regulations listed under Technical
Data as a safety class I device, and has been shipped from the
factory in flawless technical safety condition. In order to maintain
this condition and to assure safe operation, users must observe
all notes and warnings included in these operating instructions.
A note concerning operation, practical advice or other
information which must be adhered to in order to prevent
damage to the KONSTANTER, and to assure correct
operation.
Protective Grounding, PE Connection
The KONSTANTER may only be placed into operation
after the protective conductor has been connected.
Interruption or disconnection of the protective conductor
may result in
The device is connected to the mains by means of a 3
conductor cable with mains plug.
Opening the Housing Covers
Remove the mains plug from the outlet before opening
the housing. When the housing covers are opened,
voltage conducting parts may be exposed. Any contact
with these exposed conductive parts is life endangering.
For this reason, the instrument may only be opened by
trained personnel who are familiar with the dangers
involved.
Repair by Trained Personnel
Maintenance and repair work, as well as internal
balancing, may only be performed by trained personnel
who are familiar with the respective functions, and the
dangers involved.
After the instrument has been disconnected from the
mains, wait approximately 5 minutes in order to allow the
capacitors to discharge themselves to safe voltage levels.
Replacing Fuses
Only specified fuse types with the specified nominal current rating may be used to replace blown fuses (see
Technical Data and specifications on the serial plate).
Manipulation of the fuses and/or the fuse holder is
prohibited.
Impaired Safety
If it can be assumed that safe operation is no longer
possible, the KONSTANTER must beremoved from service and secured against inadvertent use. Safe
operation is no longer possible:
– If the KONSTANTER demonstrates visible damage or
transport damage
– If the KONSTANTER no longer functions
– After lengthy periods of storage under conditions
which deviate from the specified storage conditions
Significance of Symbols
Indicates EC conformity
danger for the user.
This instrument fulfills the requirements of applicable European
and national EC directives. This is confirmed by means of the CE
mark.
An operating procedure, practical advice or other
information which must be adhered to in order to assure
safe operation of the KONSTANTER, and to prevent
personal injury.
The most important warnings are summarized below.
GMC-I Messtechnik GmbH3
A corresponding declaration of conformity can be requested
from GMC-I Messtechnik GmbH.
Observe ESDS guidelines
Warning concerning a point of danger
(attention: observe documentation!)
The device may not be disposed of with the trash.
Further information regarding the WEEE mark can be
accessed at www.gossenmetrawatt.com by entering
the search term WEEE.
2Initial Start-Up – Dimensional Drawings
447
465
482.6
501
40
88
15
76.2
Installation position for optional IEEE-488 interface (material no. K384A).
All dimensions in mm
14
4
18
2.1Dimensional Drawing SYSKON P500 / P800 / P1500
4GMC-I Messtechnik GmbH
2.2Dimensional Drawing SYSKON P3000 / P4500
447
465
482.6
501
40
177
14
101.6
Installation position for optional interface IEEE-488 (material no. K384A).
All dimensions in millimeter
14
4
18
GMC-I Messtechnik GmbH5
2.3Preparing for Operation
Warning!
Attention!
!
Warning!
Attention!
!
Note: Numbers in brackets make reference to the items listed in
the dimensional drawing.
2.3.1 Installing the Optional GPIB Interface Module
Before switching the SYSKON KONSTANTER on, it must
be assured that available mains power complies with the
supply power values specified at the mains connection
on the back of the device.
The device must be switched off when installing the
interface module. Remove the mains plug from the outlet.
The interface module may be damaged by electrostatic
discharge. ESDS handling guidelines must be adhered
to. Do not touch electrical contacts or components.
1. Unscrew the cover plate at the right-hand side of the rear
housing panel.
2. Carefully remove the ribbon cable from the cable uptake and
plug it in, being certain to observe coding as shown on the
interface module.
3. Carefully insert the connected module into the opening and
secure it with the previously removed cover plate screw.
2.3.2 Setup as Benchtop Device
The instrument is shipped as a benchtop device and the feet are
already installed. The mounting tabs for installation to a 19" rack
are shipped loose. The instrument can be set up as a benchtop
device and placed into operation. Unimpaired ventilation of the
instrument must be assured during setup.
2.3.3 Installation to a 19'' Device Cabinet
The SYSKON KONSTANTER housing allows for use as a benchtop instrument, as well as for installation to a 19'' rack.
The benchtop instrument can be quickly converted to a rack
mount device:
1. Unscrew the handles at the front.
2. Pull out the filler strips at the sides and replace them with the
included rack-mount fastening tabs.
3. Replace the front handles (if you prefer to leave the handles
off, turn M4 screws with a maximum length of 8 mm into the
threaded holes).
4. Unscrew the feet from the bottom of the housing.
5. Save all loose parts for possible future use.
The instrument must be attached at both sides to guide
rails inside the device cabinet. The guide rails, as well as
the front panel mounting screws, are cabinet-specific
and must be procured from your rack supplier.
2.3.4 Connection to the Mains
Protective Grounding, PE Connection
The KONSTANTER may only be placed into operation
after the protective conductor has been connected.
Interruption or disconnection of the protective conductor
may result in
The device is connected to the mains by means of a 3
conductor cable with mains plug.
danger for the user.
SYSKON P500/P800/P1500: The device can be operated with either
115 or 230 V mains power. Full output power (1500 W) can be
taken advantage of when operated with 230 V mains power. Due
to resulting input current, only 750 W of output power can be
supplied when operated with 115 V mains power.
SYSKON P3000/P4500: In order to exploit the full nominal power, the
device must be operated with a 400 Volt 3-phase current system.
Integrated monitoring circuits detect mains power and limit output
power in the event of overloading.
The instrument is connected to a mains outlet with earthing contact via the mains inlet connector [18] at the rear panel with the
help of the included power cable (only included with the SYSKON
P500/P800/P1500).
2.3.5 Connecting Power Consumers
The output leads are connected to the output terminal blocks [14]
at the rear panel by means of ring-type cable lugs with the
included screws. (SYSKON P500/P800/P1500: M6 x 10, SYSKON P3000/P4500: M8 x 12 and M6 x 10). In addition to this, 4 mm
holes are also provided which are intended for the connection of
any utilized measurement cables.
Connection:
Remove the safety cap.
Connect the output leads to the terminal blocks with the
provided screws and washers.
An adequate wire cross-section and correct polarity must be
assured. It is advisable to twist the output leads and to identify
polarity at both ends.
Avoid exerting excessive force at the terminals.
Align the leads to the openings in the safety cap.
Snap the safety cap back into place.
In order to be able to take advantage of highly constant output
voltage at the consumer even if long leads are used, sensing
leads can be used to compensate for voltage drops within the
output leads (see chapter 7).
The terminals for the sensing leads are located on the analog
interface.
2.3.6 Connection to Computer Interfaces
Three interfaces are available on the instrument for computercontrolled operation.
The device is furnished with a USB port and an RS 232 interface
as standard equipment.
A GPIB interface can be ordered as an optional module and
installed as described. Installation at a later point in time is also
possible.
The instrument cannot be remote controlled via more than one
interface at a time. It is thus advisable to connect the desired
interface only.
In order to avoid communications problems with the interfaces,
only one interface should be connected to the computer.
Problems may otherwise occur.
In order to assure that existing bus activity is not interfered with,
all affected devices should be switched off while establishing the
bus connection.
All of the interfaces have a common reference point (GND) which is
connected to PE, and are isolated from the output in accordance with the
specified electrical safety regulations.
6GMC-I Messtechnik GmbH
a) USB Port
Attention!
!
TxD 2
3
5
RxD
GND
2 RxD
3 TxD
5 GND
SYSKON
RS 232
PC / Controller
9-Pin Subminiature Socket Connector
9-Pin Subminiature Plug Connector
The type B USB plug is at the at the bottom right-hand side of
the front panel. Appropriate USB drivers must be installed,
which are on the included CD or can be downloaded from the
Internet, see chapter 2.3.7.
b) RS 232C Interface
The socket connector for the RS 232 interface is on the
instrument’s rear panel. A 9-pin subminiature socket connector is used to this end.
The ZIP file can be unpacked in any desired directory. The setup
file then appears in the directory. Installation is started by double
clicking the setup file. A wizard guides you through the installation
procedure.
2.3.8 Connecting the Analog Interface
The plug connection for the
analog interface is located on
the rear panel. Two 10-pin
plug-in screw terminal connections are used to this
end. The necessary connections for the selected analog
control function can be made
here. In order to keep cross
interference with the analog
signals to a minimum, it is advisable to use shielded connector
cables. The individual signals are described under “Analog Interface”.
2.4Switching the Device On
After the described preparations have been completed, the
device can be switched on. The mains switch is located at the
bottom left-hand side of the front panel.
Start-Up Routine
After switching the device on, the POWER lamp [4] lights up and
the fan is started. The microprocessor included in the device then
starts a power-up test. The following operations are performed
during the test routine (duration approximately 6 seconds):
• Reset all functional units (except battery-backed configuration
memory)
• LED and display segment test
• Hardware/firmware version display, see chapter 2.4.1
• Line voltage range is detected, see chapter 2.4.2
• Initialization of the 2 (possibly 3) computer interfaces; if the
device has been equipped with the optional “IEEE 488
interface”, the selected IEC bus device address then appears
briefly at the display (example: “Addr 12”).
See chapter 6 main menu level SETUP DISPLAY & INTERFACE for
changing the device address.
• Date display (internal clock)
• Time display (internal clock)
• Recall last settings if applicable
• Switch to (default after “*RST”) display of measured values for
voltage (Uout) and current (Iout)
After initial power-up, the device is set to its basic default
configuration (see the table entitled “Adjustable Functions and
Parameters” in chapter 10.1).
Upon shipment from the factory, the device is configured such
that the setpoints for output voltage and current are set to zero,
and the power output is set to off.
For further use, status after power on depends upon the selected
device configuration.
This configuration is selected either manually with the help of
the corresponding menu item, or by means of the POWER_ON
command.
Avoid switching the device on and off in a rapid,
repeated fashion. This temporarily impairs the
effectiveness of the inrush current limiting function,
and may result in a blown fuse.
2.4.1 Table of Firmware Versions
Firmware VersionMemory Locations
Version 00312 SETUP memory locations
Version 00415 SETUP memory locations
1536 SEQUENCE memory locations
1700 SEQUENCE memory locations
2.4.2 Response after Power ON with Varying Line Voltage
Ranges (230 V 115 V)
Up to and including Firmware Version 004
After „Power ON“, a distinction is made - on the basis of the line
voltage detected - between the two available power ranges.
When the line voltage is „low“, output power Pnom is reduced by
half (see chapter 4.1).
The specified value „PSET < Pnom“ (and/or „PSET < Pnenn/2“ in
the case of power derating), in turn, is the setting criterion for the
function „Power control“. After an automatic change of Pnom it
may be necessary to correct the PSET value for power control!
Power ON & Setting „Power_ON RST / SBY / RCL / ...“:
• „RST“ Pnom is always readjusted in accordance
with the detected line voltage.
• „SBY“, „RCL“ A low line voltage always leads to a reduced
Pnom value. If the device is subsequently
switched on to a „high“ line voltage, the low
Pnom value remains active until either:
– a „RESET“ is performed (!)
or
– „Power“ is reconnected with parameter
setting
„POWER_ON RST“
.
Changes between the line voltage ranges result in system messsages, see Err AC-L and Err AC-H in chapter 11.
As from Firmware-Version 005
After „Power ON“, a distinction is made - on the basis of the line
voltage detected - between the two available power ranges.
When the line voltage is „low“, output power is limited to approximately 55 % of the nominal power.
If the device is switched on in setting „POWER_ON RST“ at „low“
line voltage, the setting limit value is reduced to half the nominal
power for parameter PSET.
The specified value „PSET < Pnom“ (and/or „PSET < Pnenn/2“ in
the case of power derating), in turn, is the setting criterion for the
function „Power control“.
Power ON & Setting „Power_ON RST / SBY / RCL / ...“:
• „RST“ Pnom is always readjusted in accordance
with the detected line voltage.
• „SBY“, „RCL“ A low line voltage always leads to a reduced
maximum output power. The setting limit
values for parameter PSET, however, remain
unchanged until either:
– a memory recall of a corresponding device
setting is performed
or
– „Power“ is reconnected with parameter
setting
„POWER_ON RST“
.
Changes between the line voltage ranges result in system messsages, see Err AC-L and Err AC-H in chapter 11.
8GMC-I Messtechnik GmbH
3Technical Description
Description
SYSKON KONSTANTERs (power factor control, single-output
system power supplies) are manual and remote controllable DC
power supplies for laboratory and system use. Thanks to modern
switching controller technology, the devices are compact and
lightweight despite high output power.
Active power factor control assures nearly sinusoidal mains input
current.
The floating output features “safety separation” from the mains
input as well as from the computer interfaces, and is classified as
a safety extra-low voltage circuit (SELV) in accordance with VDE /
IEC. Wide ranging nominal output power values are available from
output voltage and output current.
The power output is voltage and current controlled with limiting to
maximum withdrawable power.
Transition to the control modes is automatic in accordance with
the selected setpoints and load circumstances.
The control loops are designed for short response times.
An automatically activated, dynamic sink (can be disabled)
provides for quick discharging of the output capacitors.
Numerous protective functions and monitoring devices allow for
ideal adaptation to actual conditions of use.
Features
The devices are generally equipped with a control panel and
display, as well as an analog interface.
One USB port and one RS 232 interface are provided as standard
equipment for integration into computer controlled systems. The
drivers for the USB port are provided as accessories on the
included CD ROM.
An IEEE 488 interface can be additionally installed to the device
from the outside ,or retrofitted as an option.
Manual adjustment of voltage and current is accomplished by
means of two rotary encoders with selectable resolution, or with
the numeric keypad. Numerous additional functions can be
accessed via keys.
Two 5-place digital LED displays read out measured values and
settings. LEDs indicate the current operating mode, selected display parameters and the status of device and interface functions.
The analog interface makes it possible to adjust output voltage
and current with the help of external control voltages. Monitor
outputs read out an analog image of the voltage and current
output quantities for further processing or additional displays.
These control inputs and monitor outputs can also be used to
couple several devices for master-slave operation with parallel or
series connection.
Two floating trigger inputs are available for controlling certain
device functions. For example, they can be used to switch the
output on and off, or to control sequences.
Furthermore, three signal outputs are included at the analog interface, two of which are floating. These can be activated depending
upon various functions, and can thus be used to control external
devices or sequences.
Applications Range
Konstanters are suitable for use wherever electronic modules with
controlled direct voltage or controlled current need to be supplied
with electrical power, especially in the fields of R&D, testing,
production, test systems and training.
Thanks to their characteristic U-I-P curve, the devices have a
broad working range, making it possible to cover a large range of
applications with a single device.
Due to their short response times, SYSKON KONSTANTERs can
be used for replication and simulation of onboard electrical systems, for example in automotive applications. Test signals specified in the corresponding standards can be generated. The fact
that these voltage-current-time profiles can be saved to memory
at the Konstanter for running independent sequences is highly
advantageous. When used in test systems, it is thus possible to
significantly reduce workload for the control computer. Further
functions for test applications of this sort include the Min-Max
function for acquiring extreme values and the tolerance band
function which generates a signal when measured values do not
lie within the specified tolerance limits.
The Konstanter thus serves as an autonomous test system for
many applications.
Adjustable Functions (selection)
– Voltage and current setpoint values
– Voltage and current limit values (soft-limits)
– Activate / deactivate the output
– Overvoltage protection trigger value (OVP)
– Overcurrent protection trigger value (OCP)
– Delay time for reaction to overvoltage
– Selection of the desired reaction when OVP and OCP are
triggered
– Delay time for reaction to overcurrent
– Performance after power on
– Reset device settings
– Save device settings
– Recall device settings, individually or sequentially
– Function selection for trigger input
– Configurable status and events management
with enabling windows (via computer interface)
– Activate / deactivate digital displays
Retrievable Information (selection)
– Presently measured voltage and current values
– Minimum and maximum measured voltage and current values
– Current output power
– Current device settings
– Current device status (i.e. control mode, overtemperature etc.)
– Occurred events (i.e. mains failure, overtemperature,
overvoltage, overload etc.)
– Device ID (via computer interface)
Protection and Additional Functions
– Sensor terminals protected against polarity reversal and
automatic switching to auto-sensing
– Protection against excessive temperature
– Output protected against reverse polarity
– Front panel control disabling
– Backup battery for device settings memory
– Recognition of mains or phase failure
– Inrush current limiting
GMC-I Messtechnik GmbH9
Performance After Power on
In the event of mains failure, it’s important to specify which
operating state the device will assume when power is restored.
This may be extremely important if the device is used in long-term
testing applications.
One of the following states can be selected:
– Reset = default setting (0 V, 0 A, output deactivated)
– Standby= last used configuration but with deactivated output
– Recall =
was last switched off, with
mains failure
– Recall a device configuration from setup memory
last used configuration – same as when the instrument
active output if it was active prior to
Set Output Voltage and Output Current
Output voltage and output current can also be adjusted using the
rotary encoders or the numeric keypad if desired. The rotary
encoders are used exclusively for adjusting voltage and current.
The decimal place to be changed is selected with the scroll keys.
Additional functions and parameters can be accessed and
adjusted with the keys.
Switching the Input On and Off
The power output can be switched on and off by pressing the
appropriate key, with a computer command or by applying a
signal to the trigger input. When switched off, the output is highly
resistive and is not electrically isolated from the power consumer.
The LED on the key indicates status.
Protection and Additional Functions
A multitude of protection and additional functions have been
integrated, for example:
• Limiting of the setting ranges for voltage and current
• Overvoltage protection (OVP) with adjustable response delay
and reaction
• Overcurrent protection (OCP) with adjustable response delay
and reaction
• Protection in the event of reversed polarity at the sensing leads
• Automatic switching to auto-sensing
• Protection against excessive temperature
• Output protected against reverse polarity
• Front panel control disabling
• Backup battery for device settings memory
• Mains failure detection
• Inrush current limiting
• Line voltage monitoring
Line Voltage Monitoring
To protect the device, power output is deactivated and disabled
in the event of voltage dips or short-term interruptions. The device
must be restarted with „Power ON“.
Dynamic Sink
A dynamic sink is activated by the control loops as required for
rapid discharging of the output capacitors.
This allows for short response times when switching to smaller
setpoint values. Depending upon the application, the sink
function can also be disabled.
Front Panel Control Disabling
The controls can be disabled to prevent unauthorized operation
by pressing the appropriate key, with a computer command or by
applying a signal to the trigger input.
Analog Control Inputs
Voltage and current can also be adjusted by via the control inputs
at the analog interface. A 5 V signal corresponds to 100% of the
respective nominal value.
These inputs can be switched on and off using the keys, or with
computer commands.
The controlled output quantity is the sum of the digital setpoint
value and the specified value at the control input.
This function makes it possible to superimpose these control
signals onto the output quantities.
Monitor Outputs
The actual values for output voltage and current can be
acquired at the monitor outputs as a standardized signal (10 V
corresponds to 100% nominal value).
Trigger Inputs
Two floating trigger inputs are available for controlling device
functions. The following trigger input assignments can be
selected:
– output = Switch the power output on and off
– local lock = Disable controls
– SQS = (sequence step) Step-by-step control of a
stored sequence
– sequence = Start / stop the sequence function
– Analog input = Activate / deactivate the analog control inputs
Signal Outputs
Programmable Control Outputs
The analog interface is equipped with three digital control outputs
for status messages to external monitoring devices, for switching
external components on and off, or for coupling purposes.
The status of these outputs can be defined either directly, or
depending upon the following device statuses:
– Output on or off
– Voltage or current regulation
– Sequence function running or finished
– SSET signal status for the sequence function
– Limit value message for the measuring function (tolerance band)
Min-Max Measured Value Memory
The Min-Max function automatically acquires and saves minimum
and maximum voltage and current values.
Tolerance Band (in combination with Min-Max function)
Measured output values can be continuously compared with
stored upper and lower tolerance band values. Evaluation is
possible via the programmable control outputs.
Auto-Sensing
The device can be switched to sensing mode operation (remote
sensing) in order to compensate for voltage drop at the output
leads. Sensing lead terminals are available to this end at the
analog interface. If the (–) negative sensing terminal is connected
to the negative load point, the device is automatically switched to
sensing mode operation. Maximum compensatable voltage drop
is 1 V per output lead.
10GMC-I Messtechnik GmbH
Memory
U [V]
12
6
4.5
5
t [ms]
155200010
The memory function makes it possible to save and recall device
configurations using a battery-backed memory module.
The memory module is equipped with two storage areas:
– Setup memory: 12/15 memory locations for complete
configurations
– Sequence memory: 1536/1700 memory locations for the fol-
lowing sequence parameters: voltage setpoint USET, current
setpoint ISET, dwell time TSET and function request FSET,
with the ability to invoke subsequences
Sample Application
Generation of a characteristic voltage curve in an automotive electrical system when starting the engine
Note:
The drop times can be influenced by the input impedance of the
DUT.
Balancing Function (adjust)
Offset and final values for setting and measured values for output
quantities voltage and current are balanced digitally in the device.
The user can execute balancing as required with this function.
DAkkS Calibration Certificate
All SYSKON Konstanters are shipped with a DAkkS calibration
certificate issued by our DAkkS test laboratory.
•USB port
USB port: 4-pin, type B
USB 1.1 compatible with USB 2.0
Connector pin assignments 1: VCC, 2: D-, 3: D+, 4: GND
Transmission speed9600 to 115,200 baud, adjustable
Power supply
Line voltage
Inrush currentMax. 50 A
Mains fuse
115
/230 V ~ + 10 / – 15%; 47 to 63 Hz
S
SYSKON P500/P800/P1500
1 x M 15 A / 250 V (6.3 x 32 mm), UL
SYSKON P3000
/4500: 3 x M15 A/250 V
:
Electrical Safety
Safety classI
Measuring categoryII for mains input
IEC 61010-1:2010
DIN EN 61010-1:2010
VDE 0411-1:2011
EN 61326
4.1.1 Electromagnetic Compatibility
SYSKON P500/P800/P1500
Generic standardEN 61326-1: October 2006
Interference emission EN 55022: class B
Interference immunity
EN 61000-4-2: feature A
EN 61000-4-3: feature B
EN 61000-4-4: feature A
EN 61000-4-5: feature A
EN 61000-4-6: feature A
EN 61000-4-8: feature A
EN 61000-4-11: feature A
SYSKON P3000/4500
Generic standardEN 61326-1: October 2006
Interference emission EN 55022: class A *
Interference immunity EN 61000-4-2: feature B
EN 61000-4-3: feature A
EN 61000-4-4: feature B
EN 61000-4-5: feature B
EN 61000-4-6: feature A
EN 61000-4-8: feature A
EN 61000-4-11: feature B
* Note:
Approved for the deployment in industrial environment. The
device may cause radio interferences in domestic areas.
Output Characteristics (ppm and percentage values make reference to the respective setting or measured value)
Setting resolutionVoltage
Setting accuracy (at 23 5 °C)Auto-sensing mode
Without auto-sensing
Temperature coefficient
for / K setting
Setting accuracy via analog interface (at 23 5°C)
U
setnom/Usetanalog
Static system deviationAuto-sensing mode
at 100% load fluctuation
= 12; I
setnom/Isetanalog
Without auto-sensing
= 12/24/36
Static system deviation
with 10% line voltage fluctuation
Residual rippleVoltage
Ripple: 10 Hz to 20 kHz
Ripple: 10 Hz to 1 MHz
Ripple + noise: 10 Hz to 10 MHz
Ripple + noise: 10 Hz to 10 MHz
Current
To le ra nc e
Output voltage transient recovery time with sudden
load variation within range of 20 to 100% I
and 20 to 100% U
Output voltage over and undershooting with sudden
load variation within a range of 20 to 100% I
and 20 to 100% U
Setting time for output voltage
1)
nom
nom
nom
nom
where Uset step = 0 V 60 V
where Uset step = 60 V 1 V
where Uset step = 0 V 25 V
where Uset step = 25 V 1 V
Output capacitor
I = + 80% + approx. 800 A/ms
I = – 80 % + approx. 1200 A/ms
No-load; nominal load
No-load; nominal load
No-load; nominal load
No-load; nominal load
I = 10%
I = 10%
I = 80%
To le ra nc e
Nominal value
Sink (continuous power)
Measuring Function
Measuring RangeVoltage
Measuring resolutionVoltage
Measuring accuracy (at 23 5°C)Voltage
Measured value temperature coefficient / KVoltage
Measuring accuracy (at 23 ± 5 °C) at analog interface
U
/ U
actualnom
Protection and Additional Functions
Output overvoltage protectionTrigger value
actualanalog
= 6; I
actualnom
/ I
actualanalog
= 6/12/18
Setting Range
Setting resolution
Setting accuracy
Response time
Output overcurrent protectionTrigger value
Setting Range
Setting resolution
Setting accuracy
Response time
Reverse polarity protection load capacityContinuous 30 A40 A60 A
Reverse voltage withstand capacityContinuous 70 V –70 V –70 V –
Auto-sensing modeCompensatable voltage dropPer output lead 1 V1 V1 V
General
Power supply with 230 V~ nominal line voltage
Power consumption
At nominal load, 100%
Line voltage
At no load
Power supply with 115 V~ nominal line voltage
Power consumption
Line voltage
At nominal load, 50%
At no load
Max. power loss
At a nominal load
500 W/800 W/1500 W (230 V~)
At a nominal load 500 W/800 W/750 W (115 V~)
Efficiency
At a nominal load
500 W/800 W/1500 W (230 V~)
At a nominal load 500 W/800 W/750 W (115 V~)
Switching frequency, PFC / DC/DCTypical 47 kHz / 230 kHz47 kHz / 230 kHz47 kHz / 230 kHz
Inrush currentMax. 50 A
Mains fuse (6.3 x 32 mm, UL)1 x M 15 A / 250 V1 x M 15 A / 250 V1 x M 15 A / 250 V
MTBF (mean time between failures)at 40 °C > 50,000 h> 50,000 h> 50,000 hours
1)
at maximum current setting not including processing time for the previous voltage setting command
0 ... 60 V
0 ... 30 A
Power
max. 500 W
1 mV
Current
1 mA
Voltage
0.05 % + 30 mV
0.05 % + 48 mV
Current
0.05 % + 90 mA
Voltage
100 ppm
Current
100 ppm
Voltage
0.6 % + 120 mV
Current
0.6 % + 120 mA
Voltage
30 mV (< 500 μV/A)
48 mV
(< 500 μA/V)
30 mA
Current
Voltage
5 mV
Current
5 mA
40 mV
ss
50 mV
ss
60 mVss / 6 mV
50 mA
eff
120 mV
100 μs
600 μs
950 μs
150 mV
500 mV
120 mV
2)
2 ms / 2 ms
2)
70 ms / 20 ms
2)
1.4 ms / 1.4 ms
2)
16 ms / 5 ms
2020 μF
Power
40 W – 65 W
– 16.384 … + 98.300 V
Current
– 32.766 … + 98.300 A
Power
U x I
2 mV
Current
2 mA
Power
100 mW
0.05 % + 30 mV
Current
0.4 % + 90 mA
Power
0.5 % + 1 W
50 ppm + 0.4 mV
Current
100 ppm + 1 mA
Voltage
0.4 % + 120 mV
Current
0.5 % + 180 mA
3 … 80 V
20 mV
150 mV –10 m x I
200 μs
1.5 … 40 A
20 mA
–(1% + 350 mA) – 20 mA/V x U
200 μs
230 V~ + 10 / – 15 %,
47 … 63 Hz
700 VA; 650 W
96 VA; 37 W
115 V~ + 10 / – 15 %,
47 … 63 Hz
800 VA; 750 W
55 VA; 36 W
150 W
250 W
77 %
66 %
s
(< 800 μV/A;)
eff
0 ... 60 V
0 ... 40 A
max. 800 W
1 mV
1 mA
0.05 % + 30 mV
0.05 % + 48 mV
0.05 % + 90 mA
100 ppm
100 ppm
0.6 % + 120 mV
0.6 % + 120 mA
30 mV (< 500 μV/A)
48 mV
30 mA
5 mV
5 mA
40 mV
50 mV
60 mVss / 6 mV
50 mA
120 mV
100 μs
500 μs
650 μs
150 mV
550 mV
120 mV
2 ms / 2 ms
70 ms / 15 ms
1.4 ms / 1.4 ms
16 ms / 3 ms
2020 μF
40 W – 65 W
– 16.384 … + 98.300 V
– 32.766 … + 98.300 A
U x I
2 mV
2 mA
100 mW
0.05 % + 30 mV
0.4 % + 90 mA
0.5 % + 1 W
50 ppm + 0.4 mV
100 ppm + 1 mA
0.4 % + 120 mV
0.5 % + 180 mA
3 … 80 V
20 mV
150 mV –20 m x I
a
200 μs
2 … 53 A
20 mA
–
(1% + 350 mA) – 20 mA/V x U
a
200 μs
230 V~ + 10 / – 15 %,
47 … 63 Hz
1050 VA; 1000 W
96 VA; 37 W
115 V~ + 10 / – 15 %,
47 … 63 Hz
1175 VA; 1150 W
55 VA; 36 W
200 W
350 W
80 %
70 %
50 A
s
(< 800 μV/A;)
(< 500 μA/V)
ss
ss
eff
eff
0 to 60 V
0 to 60 A
Max. 1500 W
1 mV
1 mA
0.05% + 30 mV
0.05% + 48 mV
0.05% + 90 mA
100 ppm
100 ppm
0.6% + 120 mV
1.2% + 120 mA
30 mV (< 500 μV/A)
48 mV
(< 800 μV/A;)
(< 500 μA/V)
30 mA
5 mV
5 mA
40 mV
ss
50 mV
ss
60 mVss / 6 mV
50 mA
120 mV
RMS
RMS
100 μs
400 μs
500 μs
150 mV
700 mV
120 mV
2 ms / 2 ms
70 ms / 11ms
1.4 ms / 1.4 ms
16 ms / 3 ms
2020 μF
40 to 65 W
– 16.384 to + 98.300 V
– 2.766 to + 98.300 A
U x I
2 mV
2 mA
100 mW
0.05% + 30 mV
0.4% + 90 mA
0.5% + 1 W
0.4 mV + 50 ppm
1 mA + 100 ppm
0.4 % + 120 mV
1.2 % + 180 mA
3 to 80 V
20 mV
150 mV – 10 m x I
a
200 μs
3 to 80 A
20 mA
–(1% + 350 mA) – 20 mA/V x U
a
200 μs
230 V~ + 10 / – 15%,
47 to 63 Hz
1925 VA; 1865 W
96 VA; 37 W
115 V~ + 10 / – 15%,
47 to 63 Hz
1125 VA; 1100 W
55 VA; 36 W
365 W
350 W
80%
68%
50 A
s
2)
Nominal load: Rload = Uset² / Pnom
a
a
GMC-I Messtechnik GmbH15
Article NumberK363AK364A
TypeSYSKON P3000-060-120SYSKON P4500-060-180
Nominal Output DataVoltage setting range
Current setting range
Power
0 ... 60 V
0 ... 120 A
max. 3000 W
0 ... 60 V
0 ... 180 A
max. 4500 W
Output Characteristics (ppm and percentage values make reference to the respective setting or measured value)
Setting resolutionVoltage
Setting accuracy (at 23 5 °C)Auto-sensing mode
Without auto-sensing
Temperature coefficient
for / K setting
Setting accuracy via analog interface (at 23 5°C)
U
setnom/Usetanalog
Static system deviationAuto-sensing mode
at 100% load fluctuation
= 12; I
setnom/Isetanalog
Without auto-sensing
= 12/24/36
Static system deviation
with 10% line voltage fluctuation
Residual rippleVoltage
Ripple: 10 Hz to 20 kHz
Ripple: 10 Hz to 1 MHz
Ripple + noise: 10 Hz to 10 MHz
Ripple + noise: 10 Hz to 10 MHz
Current
To le ra nc e
Output voltage transient recovery time with sudden
load variation within range of 20 to 100% I
and 20 to 100% U
Output voltage over and undershooting with sudden
load variation within a range of 20 to 100% I
and 20 to 100% U
Setting time for output voltage
1)
nom
nom
nom
nom
where Uset step = 0 V 60 V
where Uset step = 60 V 1 V
where Uset step = 0 V 25 V
where Uset step = 25 V 1 V
Output capacitor
I = + 80% + approx. 800 A/ms
I = – 80 % + approx. 1200 A/ms
No-load; nominal load
No-load; nominal load
No-load; nominal load
No-load; nominal load
I = 10%
I = 10%
I = 80%
To le ra nc e
Nominal value
Sink (continuous power)
Current
Voltage
Current
Voltage
Current
Voltage
Current
Voltage
Current
Voltage
Current
2)
2)
2)
2)
Power
1 mV
2 mA
0.07 % + 48 mV
0.07 % + 60 mV
0.1 % + 135 mA
100 ppm
100 ppm
0.6 % + 150 mV
1.2 % + 180 mA
60 mV (< 500 μV/A)
96 mV (< 800 μV/A)
60 mA (< 1000 μA/V)
7 mV
30 mA
60 mV
ss
75 mV
ss
90 mVss / 10 mV
70 mA
120 mV
eff
eff
400 μs
1200 μs
1900 μs
200 mV
1200 mV
120 mV
4 ms / 15 ms
70 ms / 11 ms
1.2 ms / 6 ms
16 ms / 6 ms
4040 μF
80 W – 130 W
1 mV
3.125 mA
0.1 % + 48 mV
0.1 % + 60 mV
0.15 % + 180 mA
100 ppm
100 ppm
0.6 % + 150 mV
1.2 % + 240 mA
90 mV (< 500 μV/A)
144 mV (< 800 μV/A)
90 mA (< 1500 μA/V)
10 mV
60 mA
80 mV
ss
100 mV
ss
120 mVss / 15 mV
100 mA
120 mV
eff
eff
500 μs
1600 μs
2500 μs
250 mV
1300 mV
120 mV
7 ms / 19 ms
70 ms / 11 ms
2.4 ms / 11 ms
16 ms / 6 ms
6060 μF
120 W – 195 W
Measuring Function
Measuring RangeVoltage
Measuring resolutionVoltage
Measuring accuracy (at 23 5°C)Voltage
Measured value temperature coefficient / KVoltage
Measuring accuracy (at 23 ± 5 °C) at analog interface
U
/ U
actualnom
Protection and Additional Functions
Output overvoltage protectionTrigger value
actualanalog
= 6; I
actualnom
/ I
actualanalog
= 6/12/18
Setting Range
Setting resolution
Setting accuracy
Response time
Output overcurrent protectionTrigger value
Setting Range
Setting resolution
Setting accuracy
Response time
– 16.384 … + 98.300 V
Current
– 65.532 … + 196.600 A
Power
U x I
2 mV
Current
4 mA
Power
100 mW
0.07 % + 48 mV
Current
0.6 % + 120 mA
Power
0.7 % + 2 W
50 ppm + 0.6 mV
Current
100 ppm + 2 mA
Voltage
0.6 % + 180 mV
Current
1.2 % + 240 mA
3 … 80 V
20 mV
150 mV – 20 m x I
200 μs
6 … 160 A
50 mA
–
(1% + 500 mA) – 40 mA/V x U
200 μs
– 16.384 … + 98.300 V
– 98.298 … + 294.900 A
U x I
2 mV
6 mA
100 mW
0.1 % + 48 mV
0.8 % + 180 mA
1 % + 3 W
50 ppm + 0.8 mV
100 ppm + 3 mA
0.8 % + 180 mV
1.2 % + 300 mA
3 … 80 V
20 mV
150 mV –20 m x I
a
200 μs
9 … 240 A
100 mA
–
(1% + 700 mA) – 60 mA/V x Ua
a
200 μs
Reverse polarity protection load capacityContinuous 120 A180 A
Reverse voltage withstand capacityContinuous 70 V –70 V –
Auto-sensing modeCompensatable voltage dropPer output lead 1 V1 V
General
Power supply with 230 V~ nominal line voltage
Power consumption
Power supply with 115 V~ nominal line voltage
Power consumption
Max. power loss
At a nominal load
At a nominal load 1500 W/2250 W (115 V~)
Efficiency
At a nominal load
At a nominal load 1500 W/2250 W (115 V~)
At nominal load, 100%
3000 W/4500 W (230 V~)
3000 W/4500 W (230 V~)
Line voltage
At no load
Line voltage
At nominal load, 50%
At no load
3x230/400 V~ + 10 /
47 … 63 Hz
3810 VA; 3710 W
100 VA; 45 W
3x115/200 V~ + 10 /
47 … 63 Hz
2215 VA; 2180 W
73 VA; 48 W
710 W
680 W
81 %
69 %
–
15 %
3x230/400 V~ + 10 / – 15 %
47 … 63 Hz
5660 VA; 5500 W
110 VA; 55 W
–
15 %
3x115/200 V~ + 10 / – 15 %
47 … 63 Hz
3305 VA; 3255 W
92 VA; 60 W
1100 W
1030 W
82 %
69 %
Switching frequency, PFC / DC/DCTypical 47 kHz / 230 kHz47 kHz / 230 kHz
Inrush currentMax. 50 A
Mains fuse (6.3 x 32 mm, UL)3 x M 15 A / 250 V3 x M 15 A / 250 V
MTBF (mean time between failures)at 40 °C > 40,000 hours> 30,000 hours
1)
at maximum current setting not including processing time for the previous voltage setting command
Output operating characteristics (ppm and percentage specifications refer to the respective setting and/or measured value)
GMC-I Messtechnik GmbH17
5Controls, Display Elements and Terminals
Protective Functions and Status Displays
OTP/OVP LED lights up Overtemperature protection triggered or
output voltage 80 V exceeded, OUTPUT = off
OVP LED lights upOvervoltage detection triggered,
ovset and ovdly parameter values exceeded
(prerequisite: ovp parameter = on) OUTPUT = off
OCP LED lights upOvercurrent detection triggered,
oCset and oCdly parameters exceeded
(prerequisite: oCp parameter = on) OUTPUT = off
OVP ON LED lights up Overvoltage shutdown is activated
(ovp parameter in device setup menu = on)
OCP ON LED lights up Overcurrent shutdown is activated
(oCp parameter in device setup menu = on)
Control Mode Status Display
CV LED lights upConstant voltage regulating mode: Uout UsetLED Plim / CP* lights up yellow: Pout > Pnom (OL) green*: PSET < Pnom progr. (CP)
CC LED lights upConstant current regulating mode: Iout Iset
Mains Switch
POWER LED lights up Device is switched on
POWER switchSwitches the device on and off
Power Output On/Off Key
OUTPUT LED lights up Output is active
OUTPUT switchSwitches the power output on and off
Rotary Encoder for Voltage
Voltage setpoint Uset – adjust output voltage Uset
Condition: UL_L (lower setting limit) Uset UL_H (upper setting limit)
When the rotary encoder is activated the display is switched to Uset (LED) and the cursor becomes active – the selected
decimal place blinks at the display and can be selected with the
and scroll keys.
The new setpoint becomes effective immediately.
1
4
5
6
1213
Rack mounting tabs
Front handles
2
Device feet
3
Events
Settings
Display A
Standard display: measured
voltage value Uout, display
function is changed by pressing
the SELECT A key or by
turning the rotary knob. Adjust
resolution (select decimal place)
with the
and scroll keys
Select A
Display selection:
Uout Uset OVset Pset
Uset adjusting alternatives
Activate by turning the rotary encoder, or select with Select A Uset
Scroll keys
: select decimal place: immediately increase or reduce Uset
Numeric keypadEntry of numeric values, Uset LED blinks Execute with
, or abort with ESC
/CP
5.1Front Panel SYSKON P500 / P800 / P1500
*valid as from revision level 02 and firmware version 004. In the case of hardware revision level < 02, the LED lights up yellow in both cases.
18GMC-I Messtechnik GmbH
Rotary Encoder for Current
Current setpoint Iset – adjust output current setpoint
Condition: IL_L (lower setting limit) Iset IL_H (upper setting limit)
When the rotary encoder is activated, the display is switched to Iset (LED) and the cursor becomes active – the selected
decimal place blinks at the display and can be selected with the
and scroll keys The new setpoint becomes effective
immediately.
Device Status Displays
REMOTE LED lights upRemote control is active
ADDR/DATA
LED lights upAddressing / data transmission is active
SRQ/ERR LED lights upService request / error
LCL LOCKED
LED lights up
Control panel is disabled
SEQ STS LED lights upSequence function in HOLD status
blinksSequence is active (RUN)
Status Displays
TRG1 LED lights upTrigger signal 1 is active
TRG2 LED lights upTrigger signal 2 is active
Uext ON LED lights up Voltage input via analog interface is active
Iext ON LED lights up Current input via analog interface is active
M/S LED lights upMaster-slave function
Numeric Keypad – Menu Functions
MENUAdjustment of parameters and functions
SsetSwitching function: display and adjust signal level
SAVESave basic device settings (device parameters)
RCLRecall basic device settings
SEQ ...Sequence functions: EDIT, CONDITION, CONTROL, MEMORY
NUMNumeric entry, if active the ENTER LED lights up:
transfer setting value or acknowledge selection
ESC/LOCALReturn from menu level to standard display, abort of entry, ...
LockESC/LOCAL + SEQ CTRL: disable control panel,
press and hold ESC longer than 4 seconds: enable control panel
RSTESC/LOCAL + 0: reset device settings to default values
8
1011
Computer Interface
USB port
9
Scroll Keys
Increase Uset,
Iset or
parameter
values
Reduce Uset,
Iset or
parameter
values
Select entry
position or scroll
within the main
menu level
Select entry
position or scroll
within the main
menu level
7
Display B
Standard display:
measured current value
Iout, display function is
changed by pressing
the SELECT A key or
by turning the rotary
knob. Adjust resolution
(select decimal place)
with the
and scroll
keys.
Select B
Display selection:
Iout Iset OCset
Pout
Iset adjusting alternatives
Activate by turning the rotary encoder, or select with Select B Iset
Scroll keys : select decimal place: immediately increase or reduce Iset
Numeric keypadEntry of numeric values, Uset LED blinks Execute with , or abort with ESC
GMC-I Messtechnik GmbH19
5.2Rear Panel P500 / P800 / P1500
Power Output
Terminals for connecting the power consumer.
This is a floating output and can be grounded
with the positive or the negative pole.
Output connections may only be connected
and disconnected when the output is
inactive (OUTPUT OFF)! Danger of arcing!
Connecting the Power Consumer
The output leads are connected to the terminal
blocks by means of ring-type cable lugs with the
included M6 x 10 screws. Measurement cables
can be additionally connected to the 4 mm holes.
Remove the safety cap.
Connect the output leads to the terminal
blocks with the provided screws and washers.
An adequate wire cross-section and correct
polarity must be assured. It is advisable to
twist the output leads and to identify polarity at
both ends.
Avoid exerting excessive force at the terminals.
Align the leads to the openings in the safety
cap.
Snap the safety cap back into place.
In order to prevent danger during use,
shock-proof connector cables must be used
when connecting power consumers.
!
!
Analog Interface (X13)
• Remote control for output voltage and current
• External measurement of output voltage and current
• Connection of sensing leads in order to compensate for
voltage drops in the output leads
• Linking of several devices for master-slave operation
• Vary internal output resistance
• Control of a selected device function via the floating
trigger input
Air Vents
In order to assure adequate cooling of the
device, the outlet vents for the integrated
fans may not be covered.
Ground Terminal (earth terminal)
The output or cable shields can
be grounded here if shielded
cables or control cables are used
for the analog interface.
Terminal AllocationMeaning
Bottom Row of Terminals
1 TRG 1 +Trigger input 1, plus
2 TRG 1 –Trigger input 1, minus
3 TRG 2 +Trigger input 2, plus
4 TRG 2 –Trigger input 2, minus
5 SIG 1 +Signal output 1, collector
6 SIG 1 –Signal output 1, emitter
7 SIG 2 +Signal output 2, collector
8 SIG 2 –Signal output 2, emitter
9 SIG 3 +Signal output 3, collector
10 AGND 2Auxiliary power AGND via fusing resistor 2
Top R ow of Te rminal s
12 +15 VAuxiliary power, +15 V
12 AGND 1Auxiliary power AGND via fusing resistor 1
14 Uext +External control voltage for analog voltage setpoint (plus);
U(Uext+); Uana = +ku x U(Uext+)
15 Uext –External control voltage for analog voltage setpoint (minus);
U(Uext-); Uana = -ku x U(Uext-)
15 Iext +External control voltage for analog current setpoint (plus); U(Iext+);
Iana = +ki x U(Iext+)
16 Iext –External control voltage for analog current setpoint (plus); U(Iext+);
Iana = +ki x U(Iext+)
17 U MONVoltage monitor with reference to AGND 1
18 I MONCurrent monitor with reference to AGND 1
19 SENSE +Sensing input, plus
20 SENSE –Sensing input, minus
1414
15
22
16
20
17
16
14
20GMC-I Messtechnik GmbH
Mains fuse
Protects the mains power
input. Use only the type
specified here.
Mains Connection
Mains supply power must
comply with the values
specified here.
Symbols
Indicates EC conformity
Warning concerning a point of danger
(attention: observe documentation!)
Observe ESDS directives
The device may not be disposed of with
the trash. Further information regarding the
WEEE mark can be accessed on the
Internet at www.gossenmetrawatt.com by
entering the search term WEEE.
!
20
19
18
Computer
Interface
IEEE 488 (option)
Computer interface
RS232
17
GMC-I Messtechnik GmbH21
5.3Front Panel SYSKON P3000, P4500
1
4
5
6
1213
Rack mounting tabs
Front handles
2
Device feet
3
Events
Settings
Uset adjusting alternatives
Activate by turning the rotary encoder, or select with Select A Uset
Scroll keys
: select decimal place: immediately increase or reduce Uset
Numeric keypadEntry of numeric values, Uset LED blinks Execute with
, or abort with ESC
Control Mode Status Display
CV LED lights upConstant voltage regulating mode: Uout UsetLED Plim / CP* lights up yellow: Pout > Pnom (OL) green*: PSET < Pnom progr. (CP)
CC LED lights upConstant current regulating mode: Iout Iset
Protective Functions and Status Displays
OTP/OVP LED lights up Overtemperature protection triggered or
output voltage 80 V exceeded, OUTPUT = off
OVP LED lights upOvervoltage detection triggered,
ovset and ovdly parameter values exceeded
(prerequisite: ovp parameter = on) OUTPUT = off
OCP LED lights upOvercurrent detection triggered,
oCset and oCdly parameters exceeded
(prerequisite: oCp parameter = on) OUTPUT = off
OVP ON LED lights up Overvoltage shutdown is activated
(ovp parameter in device setup menu = on)
OCP ON LED lights up Overcurrent shutdown is activated
(oCp parameter in device setup menu = on)
Mains Switch
POWER LED lights up Device is switched on
POWER switchSwitches the device on and off
Power Output On/Off Key
OUTPUT LED lights up Output is active
OUTPUT switchSwitches the power output on and off
Rotary Encoder for Voltage
Voltage setpoint Uset – adjust output voltage Uset
Condition: UL_L (lower setting limit) Uset UL_H (upper setting limit)
When the rotary encoder is activated the display is switched to Uset (LED) and the cursor becomes active – the selected decimal
place blinks at the display and can be selected with the
and scroll keys.
The new setpoint becomes effective immediately.
Display A
Standard display: measured voltage value Uout,
display function is
changed by pressing the
SELECT A key or by
turning the rotary knob.
Adjust resolution (select
decimal place) with the
and scroll keys
Select A
Display selection:
Uout Uset OVset
Pset
* valid as from revision level 02 and firmware version 004. In the case of hardware revision level < 02, the LED lights up yellow in both cases.
22GMC-I Messtechnik GmbH
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