DSC ELECTRONICS DP-D Series User manual

DP-D Series User’s Manual
Version 08.01.2019
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
DP-D Series High Power Laboratory
Power Supplies User’s Manual
by DSC-Electronics Germany •Georgstraße 36 •53111 Bonn

DP-D Series User’s Manual
Version 08.01.2019
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
1. Connection
Our devices are pre-configured to the power grid chosen with order (if not specified otherwise, our devices are
manufactured for the EU power grid 230V 50Hz / 400V 50Hz). Subsequent adjustment after delivery is not possible.
Connecting the device to an unsuitable power source will void any warranty.
Note: Devices of the DP-D series in the performance class 4.000W - 9.000W can cause a high starting current when
switched on. Therefore, the use of circuit breakers of classes C, D or K is recommended.
1 Phase / EU Power Grid
Voltage (Recommended)
230V ± 10% AC
Voltage (Max.)
250V AC
Frequency
50Hz - 60Hz
Circuit breaker minimum requirements
The maximum current of the device shall be determined as
follows:
I = (maximum power of the device / 230) + 2
1 Phase / American Power Grid
Voltage (Recommended)
115V ± 10% AC
Voltage (Max.)
130V AC
Frequency
50Hz - 60Hz
Circuit breaker minimum requirements
The maximum current of the device shall be determined as
follows:
I = (maximum power of the device / 115) + 4
3 Phase / EU Power Grid (TN-S Network)
Voltage (Recommended)
380V - 410V
Voltage (Max.)
430V
Frequency
50Hz
Circuit breaker Minimum requirements
The maximum phase current of the device shall be
determined as follows:
I = ((maximum power of the device / 400) / 1,73) + 2

DP-D Series User’s Manual
Version 08.01.2019
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
2. General
Please read through and understand this Operation Manual before operating the product. After reading always keep
the manual nearby so that you may refer to it as needed. When moving the product to another location, be sure to
bring the manual as well.
Calibration
Before shipment, the instrument has been calibrated carefully in our factory. The calibration procedures and
standards are compliant to the national regulations and standards for electronic calibration. If you have requested a
certificate with your order, this is enclosed with your device. With ordered off-site calibration (DaKKS) the calibration
was not performed in-house, please refer to the laboratory calibration protocol for details.
Warranty
We guarantee that the instrument has undergone a strict quality test before shipment and has passed all prescribed
functional tests. We provide our customers with a warranty period of three years from receipt of the device. During the
warranty period, all repairs, as well as spare parts are always free of charge. The warranty is void in the case of
defects which have been caused by user's fault, or in case of unauthorized opening.
2.1 Safety Instructions
This chapter contains important safety instructions that you must follow when operating the instrument and when
keeping it in storage. Read the following before any operation to insure your safety and to keep the device in a proper
condition.
Safety Symbols
The following safety symbols may appear in this manual or on the instrument:
WARNING
Identifies conditions or practices that could result in injury or loss
of life.
CAUTION
Identifies conditions or practices that could result in damage to the
instrument or to other properties.
DANGER
High Voltage
ATTENTION
Refer to the Manual
Protective Earth (PE)
Earth (Ground)

DP-D Series User’s Manual
Version 08.01.2019
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
2.2 Safety Guidelines
Please follow the safety guidelines when using and putting the device into operation in order to prevent safety risks
and to ensure the correct operation of the product.
Before connecting the device to the local power supply, make sure that the device is switched off.
Check if the product is compatible with the local power supply before connecting it.
Be careful on the correct earthing of the device (PE connection)
Do not use the product in humid environments
Do not touch the output terminals of the product with unprotected hands while it is switched on.
Do not use the device in extremely dusty rooms
Do not use the device outside the parameters specified in the data sheet
2.3 Unpacking and Examination
Our products are delivered carefully packed in cardboard boxes or in wooden crates, depending on place of
destination and the type of the device (dimensions, weight). We pay attention to the environmental compatibility of the
upholstery and packaging materials used and ask you to dispose the filling material correctly if present.
Please unpack the device and check the packaging as well as the product for transport damage. Should you notice
any damage to the packaging or the device, we ask you to log it with photos and inform us immediately.
ATTENTION: If the device has been delivered in a wooden box, please do not dispose it as it can be used for eventual
return transport for service procedures. Also the packaging material of smaller devices can be stored in order to be
used if necessary for a return transport.
3. Product Description
The DP-D power supply can operate in constant voltage (CV), constant current (CC) or constant power (CP) (optional)
mode within the rated output range. This allows continuous switching between the modes in response to the load
change.
In CV mode, a regulated output voltage is provided. The output voltage remains constant as the load increases while
the output current changes in response to the load changes, until the preset current limit is reached. At that point, the
output current becomes constant and the output voltage drops in proportion to the further increases in load. The
current mode is indicated by the front panel LED indicators.
Similarly in CC mode switching from CC to CV mode automatically occurs from a decrease of the load. A regulated
output current is provided. The output current remains constant as the load decreases while the output voltage
changes in response to the load changes.
If your device is equipped with a constant power (CP) mode, the power supply will regulate the output Voltage and
Current to stay under/on the power limit set if operating in CP mode.
3.1 Capacitive load
Note: Can be ignored for devices with optional capacitive reverse current protection.
In the basic version, power supplies of the DP-D series are not protected against reverse currents, which can lead to a
reverse current from the capacitive load after switching off the output voltage of the power supply. Never connect
pre-charged capacities to the power supply unit unless you have connected a serial protection diode between the load
and the power supply. The protection diode is always recommended for operation with large capacities, please pay
attention to a correct dimensioning.
3.2 Pulse Load
Even if the peak current of the load is within the output power of the power supply, a high pulse load can cause
voltage fluctuations. To compensate these voltage fluctuations, expand your circuit by a serial induction. For low
currents, you can add a capacity in parallel for an even better result ( 1000uF / 1A).

DP-D Series User’s Manual
Version 08.01.2019
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
3.3 Inductive load
Note: Can be ignored for devices with optional inductive reverse current protection.
If the power supply is used with large inductive loads, voltage spikes with an amplitude of up to 5 times the output
voltage can occur, this may damage the power supply or lead to unstable operation. To protect the power supply from
damage, a freewheeling diode has to be used in parallel with the load.
3.4 Switches
If a mechanic switch is used to connect or disconnect the power supply from the load, electric discharge can occur
during switching on currents over 100A. This may cause unstable output. To prevent this behaviour, connect a RC
circuit to the switch contact point.
4. Front Panel Description
No.
Name
Description
1
Voltage
Displays the output voltage
2
Current
Displays the output current
3
C.C indicator
Constant Current mode indicator
4
C.V indicator
Constant Voltage mode indicator
5
Output indicator
Output status indicator
6
OV indicator
Over Voltage protection ON
7
OL indicator
Overload protection ON
8
OT indicator
Over temperature protection ON
9
Current setting
Adjusts the current setting
10
Voltage setting
Adjusts the voltage setting
11
Preset key
Press this button to set voltage and current preset
12
Output ON/OFF
Use this key to turn on or off the output
13
Power switch
Use this switch to turn on or off the power supply
14
PR indicator
PRESET Mode ON (Digital devices only)
15
FI Indicator
Voltage / Current fine tune mode (Digital devices only)

DP-D Series User’s Manual
Version 08.01.2019
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
5. Operation Instructions
Note: The DP-D power supply is manufactured with digital or analog control. The digital control is installed in devices
with digital connection (RS232, RS485, USB), all other devices are controlled analogously. There are generally two
differences in operation:
Analog control
- Press and hold the PRESET button
- No fine adjustment is possible by pressing the voltage regulator
Digital control
- Press the PRESET button to enter the values, press again to save the values.
- By pressing the voltage regulator fine adjustment of the output values is possible.
Caution: Always check that the output is switched off and the capacitors are discharged before connecting the load to
the power supply. The load can be connected either after or before the power supply is switched on - but always
before the output is switched on!
5.1 Device Check
NOTE: The device check should only be performed for troubleshooting purposes.
1. Make sure that the device is correctly connected to the power grid.
2. Please do not connect any loads to the power supply during self-test.
3. Turn on the power.
4. Press / Hold the PRESET button, set the current to maximum and the voltage to 0V.
5. Press the OUTPUT button to turn on the output of the power supply. The CV indicator lights up while the CC
indicator is off.
6. Now turn the voltage regulator to maximum, the display will show the maximum voltage.
7. Now switch off the output of the power supply by pressing the OUTPUT button again.
8. Press / Hold PRESET, set the current to minimum.
9. CAUTION: Check that the output is switched off.
10.Short the output of the power supply (Attention: the cable must be able to withstand the maximum power of the
power supply for at least 10 seconds.)
11.Switch on the output of the device again. The CC indicator lights up while the CV indicator is off.
12.Now increase the current to maximum. The maximum current is displayed.
Turn off the power supply's output, turn off the power, and disconnect all connection cables.
5.2 Voltage and Current (PRESET)
1. Turn on the power and check that the output is off.
2. Press / Hold the PRESET button, adjust the voltage and current.
3. Turn on the output by pressing the OUTPUT button.
5.3 CV Constant Voltage Operation
1. Turn on the power and check that the output is off.
2. Press / Hold PRESET and set the desired voltage and current limit.
4. Turn on the output by pressing the OUTPUT button.
5. The CV indicator lights up.
6. The power supply is now operating in constant voltage mode (CV).
The output voltage remains stable while the current is adjusted automatically. If the current exceeds the maximum
limit set, the power supply switches to CC mode and reduces the voltage not to exceed the maximum current limit.

DP-D Series User’s Manual
Version 08.01.2019
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
5.4 Constant Current Operation
1. Turn on the power and check that the output is off.
2. Press / hold PRESET and set the desired current and voltage.
4. Turn the output on by pressing the OUTPUT button.
5. The CC indicator lights up as soon as the output current reaches the current limit set.
The power supply now operates in constant current mode (CC). The output current remains stable while the voltage is
being adjusted automatically.
5.5 Optional: Constant Power Operation
1. Turn on the power and check that the output is off.
2. Press / Hold PRESET and set the desired maximum voltage, current and power.
4. Now turn the output on by pressing the OUTPUT button.
The device now regulates the output voltage as a function of the load in order to remain at the maximum limit (current
/ power) reached as the first.
5.6 Optional: Remote Sensing
The power supply is optionally equipped with remote sensing terminals, which can read the voltage at the load and
therefore compensate losses. Refer to below figure on how to connect the load to remote sensing terminals. The
remote sensing input can be connected optionally, and is automatically deactivated if not connected.
5.7 Optional: Timer
Power supplies of the DP-D series can be equipped with an integrated timer to control the output status. The
Panasonic Timer Model LT4HW-AC240VS can be set to two time periods, T1 and T2. The operation sequence is
started with the toggle switch "START" or stopped "STOP".
Working modes of the timer
Pu-A:
When the toggle switch is set to "START", the timer starts counting down at T1 (output OFF) until the time set for T1
has expired and then changes to the second state T2 (output ON). This state is retained until the time set for T2
elapses, the output then returns to the original state (output Off) and ends the process.
Pu-B:
When the toggle switch is set to "START", the timer starts counting down at T1 (output OFF) until the time set for T1
has expired and then changes to the second state T2 (output ON). This condition is retained until the time set for T2
elapses, the output then returns to the original state T1 (output Off) and starts the procedure from the beginning.
Pu-C:
When the toggle switch is set to "START", the timer starts counting down at T1 (output On) until the time set for T1
has expired and then changes to the second state T2 (output Off). This state is retained until the time set for T2
elapses, the output then returns to the original state T1 (output On) and starts the process from the beginning.
Switching the working modes

DP-D Series User’s Manual
Version 08.01.2019
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
To switch between the working modes, press the first arrow key (up/down) from the right while holding "set / lock".
a). Setting the T1 / T2 Time
Use the arrow keys below the time values   to increase / decrease them.
b). Resetting the timer
Set the toggle switch to the "STOP" position and press "Reset" to reset the timer.
c). Lock
To lock the control panel, hold down "Lock" while pressing the last arrow (left).
5.8 Optional: External „Output ON/OFF“ Control & Interlock
Input for controlling the status of the output of the laboratory power supply (on / off), switchable as “Interlock” or
external control. This input is configured as a two pin connection, a „true“ state is triggered by shorting the two pins
and a „false“ state is triggered by removing any connection between the two pins of the input.
This option can be configured as either an interlock input, which disables the output of the power supply if the state is
false, or as an external output status control which enables or disables the output of the power supply depending on
the control signal state (true = on/false = off) if the „Output On/Off“ switch of the power supply is always in the ON
position.
5.9 Optional: RS485 / RS232 / USB
DP-D series devices can be equipped with an RS485 connection to read/write output values in real time. Optionally the
device can be shipped with a RS485 →RS232 adapter, or with both, a RS485 →RS232 and RS232 →USB adapter.
(Please see communication protocol at the end of this manual)
5.10 Optional: Analog Control Ports
The DP-D series devices can be equipped with analog connections to read / write output values. The analog
connections can be accessed through the D-SUB connection on the rear side of the device. The pin-out is as follows:
Pin1: GND
Pin2: Voltage External Control +
Pin3: Current External Control +
Pin4: Power External Control +
Pin5: Voltage Feedback +
Pin6: Current Feedback +
Pin7: Power Feedback +
Pin8: External Output ON/OFF & Interlock
Pin9: (Reserved for custom options)
5.11 Optional: Adjustable Voltage Limit (OVP)
Devices of the DP-D series can optionally be equipped with an adjustable voltage limit, which can be addressed via the
front panel as well as via one of the digital interfaces (optional). If a voltage limit is set, a higher output voltage can
not be set either via the front panel nor via external interfaces.

DP-D Series User’s Manual
Version 08.01.2019
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
Operation via the front panel:
1). Switch to PRESET mode by pressing the PRESET button.
2). Press the CURRENT rotary encoder, the OV LED lights up.
3). Now set the maximum voltage by turning the VOLTAGE rotary encoder.
4). Confirm the entry by pressing the CURRENT rotary encoder.
Setting via digital interfaces:
The command 0x2d 0x02 directly addresses the voltage limitation. The command is an extension of the DP-D Series
communication protocol and is structured as follows (XX YY YY ZZ ZZ AA AA) where X is the device ID, Y is the
command, Z is the value and A is the CRC sum. The command to set the voltage limit to 5.11V would thus be for a
device with the ID 01:
01 2D 02 01 FF F0 BC
ID: 01 / BEFEHL: 2D 02 / WERT: 01 FF / CRC: F0 BC

DP-D Series User’s Manual
Version 08.01.2019
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
Communication Protocol for DSC-Electronics DP-D Series power supplies
Interface: RS-232 / RS-485 (Profibus DB)
Command format: Asynchronous, 1 start bit, 8 data bits, 1 stop bit
Baud rate: 9600
Communication mode: Master-Slave mode
Command Format
1st byte: ID number of the DC power supply, 1-16 (If the ID number is 0, all devices will response)
2nd byte: Control command
3rd byte: Data length (how many values are supplied to the device in this command)
Data byte: 16-bit data, high bit in the front
CRC check byte: MODBUS format, low byte in the front
Feedback Command Format
1st byte: ID number of the DC power supply, 1-16
2nd byte: control command
3rd byte: data length (how many values are supplied to the device in this command)
Data byte: 16-bit data, high bit in the front
CRC check byte: MODBUS format, low byte in the front
Devices with equal device ID’s can not be connected to one controller
The communication protocol includes commands for calibration, therefore please use only the commands specified in this User’s Manual

DP-D Series User’s Manual
Version 08.01.2019
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
Output Status Control: 0x20
Command:
ID number: 1-16
0x20
0x01
Output:
0x01: ON
0x00: OFF
CRC low byte
CRC high byte
Device response:
ID number: 1-16
0x20
0x01
Output:
0x01: ON
0x00: OFF
CRC low byte
CRC high byte
Voltage Setup: 0x21
Command:
ID number: 1-16
0x21
0x02
High byte of voltage value
Low byte of voltage value
CRC low byte
CRC high byte
Device response:
ID number: 1-16
0x21
0x02
High byte of voltage value
Low byte of voltage value
CRC low byte
CRC high byte
Set up Current: 0x22
Command:
ID number: 1-16
0x22
0x02
High byte of current value
Low byte of current value
CRC low byte
CRC high byte
Device response:
ID number: 1-16
0x22
0x02
High byte of current value
Low byte of current value
CRC low byte
CRC high byte

DP-D Series User’s Manual
Version 08.01.2019
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
Voltage and Current Setup: 0x23
Command:
ID number: 1-16
0x23
0x04
High byte for
voltage value
Low byte of
voltage value
High byte of current
value
Low byte for current
value
CRC low
byte
CRC high byte
Device response:
ID number: 1-16
0x23
0x04
High byte for
voltage value
Low byte of voltage
value
High byte of current
value
Low byte for current
value
CRC low byte
CRC high byte
Read Voltage and Current Feedback Data: 0x26
Command:
ID number: 1-16
0x26
0x00
CRC low byte
CRC high byte
Device response:
ID number:
1-16
0x26
0x04
High byte for
voltage feedback
Low byte of voltage
feedback
High byte of current
feedback
Low byte for
current feedback
CRC low byte
CRC high byte
Read Voltage and Current Feedback Data: 0x2a (including output status)
Command:
ID number: 1-16
0x2a
0x00
CRC low byte
CRC high byte
Device response:
ID number: 1-16
0x2a
0x05
Output status:
0x01: ON
0x00: OFF
High byte of voltage
feedback
Low byte of
voltage feedback
High byte of
current feedback
Low byte of
current
feedback
CRC low byte
CRC high
byte

DP-D Series User’s Manual
Version 08.01.2019
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
Read Maximum Voltage and Current: 0x27
Command:
ID number: 1-16
0x27
0x00
CRC low byte
CRC high byte
Device response:
ID number:
1-16
0x27
0x06
High byte of
max. voltage
Low byte of
min. voltage
Length of decimal
point “n”: all voltage
data//10^n
High byte of
max. current
Low byte of
min. current
Length of decimal
point “n”: all
current data//10^n
CRC low
byte
CRC high
byte
Read Output Voltage & Current Setup Data: 0x28
Command:
ID number: 1-16
0x28
0x00
CRC low byte
CRC high byte
Device response:
ID number: 1-16
0x28
0x05
Output status:
0x01: ON
0x00: OFF
High byte of voltage
value
Low byte of
voltage value
High byte of
current value
Low byte of
current value
CRC low
byte
CRC high
byte
Set ID Number: 0x29
Command:
ID number: 0x00
0x29
0x01
New ID number: 1-16
CRC low byte
CRC high byte
Device response:
ID number: 1-16
0x29
0x01
ID number: 1-16
CRC low byte
CRC high byte

DP-D Series User’s Manual
Version 08.01.2019
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
DSC-Electronics Germany •Georgstraße 36 •53111 Bonn
Reverse Output Polarity: 0x2b (optional)
Command:
ID number:
1-16
0x2b
0x01
Set direction:
0x00: disconnect
0x01: positive
0x02: negative
CRC low byte
CRC hight byte
Device response:
ID number:
1-16
0x2b
0x01
Set direction:
0x00: disconnect
0x01: positive
0x02: negative
CRC low bit
CRC high byte