Delta Elektronika SM 15-100 User manual

DC POWER SUPPLIES
DELTA ELEKTRONIKA B.V. Vissersdijk 4, 4301 ND
Zierikzee, the Netherlands
www.DeltaPowerSupplies.com
Tel. [phone]
SM1500-series
PRODUCT MANUAL
Contents:
1 - Datasheet
2 - Safety Instructions
3 - General
4 - Installation
5 - Trouble Shooting
6 - Maintenance & Calibration
7 - EU Declaration
•SM15-100
•SM35-45
•SM52-30
•SM52-AR-60
•SM70-22
•SM120-13
•SM300-5
•SM400-AR-8

SM1500 SAFETY INSTRUCTIONS
rev. August 2018 DELTA ELEKTRONIKA B.V. Page 2 - 1
2SAFETY INSTRUCTIONS - SM1500-series
1Caution
The following safety precautions must be observed during all phases of operation, service and repair of this equipment.
Failure to comply with the safety precautions or warnings in this document violates safety standards of design,
manufacture and intended use of this equipment and may impair the built-in protections. Delta Elektronika shall not be
liable for user’s failure to comply with these requirements.
2Installation Category
The Delta Elektronika power supplies have been evaluated to installation category II (Over voltage category II).
3Grounding of Mains Terminals (AC Power Terminals)
This product is a safety Class 1 unit. To minimize shock hazard, the unit must be connected to the AC Power Supply
mains through a three conductor power cable, with the ground wire firmly connected to an electrical ground (safety
ground) at the power outlet.
For units designed to be hard-wired to the mains supply , the protective earth terminal must be connected to the safety
electrical ground before another connection is made. Any interruption of the protective ground conductor, or
disconnection of the protective earth terminal will cause a potential shock hazard that might cause personal injury.
4Grounding of DC Power Terminals
If the DC power terminal of a unit is specified to sink or source to a maximum of 60VDC, and either the negative or
positive DC power terminal is grounded, the following connections can be considered safe:
- DC power terminals and sense connections
- programming/monitor/status-signals, interlock, Master/Slave-connections, ACF/DCF-relay
- all Delta Elektronika interfaces
Caution 1: If a low voltage unit has both DC power terminals floating, or if the DC terminals are in series with an
external high AC or DC voltage, the lower DC power terminal can exceed the safe value in respect to ground as
specified in the above warning!
Caution 2: Although a high voltage unit is set to a safe voltage below 60VDC, for safety it must always be considered as
a high voltage unit! Wrong operation, a programming error or an external defect can result in an unsafe high DC output
voltage.
Caution 3: When programming a high voltage unit directly via a PC or via a network connection, either ground the
negative power output or use a safety isolated interface!
For more information and schematics regards Grounding and Safety, see the special application note "Safe operation of
a power supply" on the Delta Elektronika website.
5Fuses
Fuses must be changed by authorized Delta Elektronika service personnel only, for continued protection against risk of
fire.
6AC Input Ratings
Do not use an AC Supply which exceeds the AC input voltage and frequency rating of this unit. The AC input voltage
and frequency rating of the Delta Elektronika power supply series are stated in the accompanying datasheet.
7Live Circuits
Operating personnel should not remove the unit covers. No internal adjustment or component replacement is allowed by
non Delta Elektronika qualified personnel. Never replace components with the power cable connected. To avoid injuries,
always disconnect power, remove external voltage sources and discharge circuits before touching components.
8Parts Substitutions & Modifications
Parts substitutions and modifications are allowed by authorized Delta Elektronika service personnel only. For repairs or
modifications the unit must be returned to a Delta Elektronika service facility.
Warning:
When the positive DC power terminal can exceed 60VDC in respect to the negative DC power terminal, additional
external measures must be taken to ensure safety isolation of the DC power terminals and sense connections.
Warning:
When the negative power output of the unit can exceed 60VDC / 42.4Vpk in respect to ground, additional
external measures must be taken to ensure safety isolation of the following:
- power outputs and sense connections
- programming/monitor/status-signals, Interlock, Master/Slave-connections, ACF/DCF-relay
- interfaces with operational isolation
- non-isolated interfaces.

SAFETY INSTRUCTIONS SM1500
Page 2 - 2DELTA ELEKTRONIKA B.V. rev. August 2018
Caution risk of electrical Shock
!
Instruction manual symbol. The unit will be marked with this symbol when it is
necessary for the user to refer to the instruction manual
Protective ground conductor terminal
oOff (supply)
IOn (supply)
WEEE (Waste Electrical & Electronic Equipment)
1Correct Disposal of this Product
Applicable in the European Union.
This marking shown on the product, its packing or its literature indicates that
it should not be disposed with other wastes at the end of its working life, but
should be collected separately to recycle it responsibly to promote the
sustainable reuse of material resources.
9Removal of (safety) covers
Safety cover(s) are used to cover potentially hazardous voltages.
Observe the following when removing safety cover(s):
•Switch off the unit.
•Disconnect the unit from the mains supply or power outlet.
•Wait for 5 minutes to allow internal capacitors to discharge.
•Unscrew the screws and remove the cover(s).
•Always place the cover(s) back before connecting the unit to the mains supply again.
10 Environmental Conditions
The Delta Elektronika power supplies safety approval applies to the following operating conditions:
•Indoor use
•Ambient temperature : −20 to 50 °C
•Maximum relative humidity : 95%, non condensing, up to 40 °C
: 75%, non condensing, up to 50 °C
•Altitude : up to 2000 m
•Pollution degree : 2
11 Canada
This product has been tested to the requirements of CAN/CSA-C22.2 No. 61010-1, second edition, including
Amendment 1, or a later version of the same standard incorporating the same level of testing requirements
12 cTUVus

SM1500 GENERAL
rev. August 2018 DELTA ELEKTRONIKA B.V. Page 3 - 1
fig. 3- 1
Output ranges. Every point in hatched
area can be used.
SM 300-5
SM 120-13
SM 35-45
SM 52-30
SM 70-22
SM 52-AR-60
SM 15-100
3GENERAL
1) OUTPUT
The SM15-100, SM35-45, SM52-30, SM52-AR-60, SM70-22, SM120-13,
SM300-5 and the SM400-AR-8 can either be used as a constant voltage
source with current limiting or asa constant current source with voltage limit-
ing. The change of mode occurs sharply at the crossing of the voltage and
current settings. Fig. 3- 1 shows the output ranges.
The SM52-AR-60 and the SM400-AR-8 feature an AUTORANGING facility
where the power supply automatically switches over between two current
ranges. This switching, which is unnoticeable forthe user, results in a versa-
tile power supply with twice the output voltage range. This means that for
the SM52-AR-60 the maximum output power of 1560 W is available at both
26Vand52V.FortheSM400-AR-8thisis1600Watboth200Vand400V.
°DISPLAY CV/CC SETTINGS FUNCTION
The settings of the voltage and current control (also when programmed) can
be observed on the front panel meters by pressing the Display CV/CC Set-
tings button. This allows the current limit to be set when operating in the CV
mode without shorting the output terminals, and the voltage limit to be set
when operating in the CC mode without opening the load leads.
°OVERLOAD PROTECTION
The power supply is fully protected against all overload conditions, including
short circuit.
2) INPUT VOLTAGE
The power supplies have a wide input voltage range.
°Atlinevoltagesbelowabout120VACtheoutputpowerhastobederated,
see page 1-2, "Input".
3) INPUT CURRENT
The unit has active power factor correction (PFC). The input current will
therefore almost be a sine wave. This means that the RMS-value and the
harmonic distortion of the input current will be relatively low.
4) STANDBY INPUT POWER
The unit consumes very little power when in standby. This makes it possible
to leave the input power on when the output is disabled using the Output
On/Off function (push button on front panel) or the Remote ShutDown input
(pin 5 on connector CON E on the rear panel).
5) EFFICIENCY
The efficiency is very high and constant over a wide output current range.
High efficiency means low power loss and low heat generation.
6) CV REGULATION
The CV-load regulation should be measured directly on the output terminals
because a few cm of cable can have a voltage drop of several mV (at high
current!).
7) CC REGULATION
For accurate CC-load regulation, do not use external voltage sensing.
A voltage between S- and minus output will create an error of about 0.04 %
per volt.
Avoltage betweenS+ and +is not critical.TheCC-stability is alsoaffectedby
external voltage sensing.
Note: when the unit operates in CC-mode, the DCF-LED will be on. When
the unit is in CC-mode most of the time, it is possible to disable the LED with
DIP switch 3 on SW1 (rear panel).
8) RIPPLE & NOISE
The output ripple is very low with almost no spikes. The ripple voltage has to
be measured directly on the output terminals using a probe with very short
connections(toavoidpickupofmagneticfields(see fig.3-2andfig.3-3).
At low temperatures like −20°C the ripple increases. By using high quality
electrolytic capacitors the increase is relatively low.
fig. 3- 2
Measuring ripple voltage
WRONG !
fig. 3- 3
Measuring ripple voltage
RIGHT !
SM 400-AR-8

GENERAL SM1500
Page 3 - 2DELTA ELEKTRONIKA B.V. rev. August 2018
fig. 3- 4
Programming inputs (internal circuit)
9) ANALOG PROGRAMMING
Theoutputvoltageandcurrentcanbeprogrammedbyanexternalanalog
voltage. This programming is very accurate and linear. The levels are all
standardized on 5 V.
The inputs have a protection circuit formed by a series resistor and a
parallel zenerse (see fig. 3- 4). The capacitor limits the speed to a safe
value.Notethatthe analoginputs (and outputs) are not floating,but the
common is connected to the negative output terminal. Wrong con-
nectionofØcancauseearthloopswhichcantripthefuse.Afterremoving
the fault, the fuse will reset (PTC-fuse). For isolated programming see
next paragraph 10).
10) ISOLATED ANALOG PROGRAMMING
To prevent earth loops which can cause programming errors, use an iso-
lated programming source. If this is not possible, use the optional ISO
AMP CARD (δ-product) which can be built inside the unit.
Withthe ISOAMPCARD earthloopsbetween theunit andtheprogram-
ming source are prevented.
11) ETHERNET / IEEE488 / RS232 PROGRAMMING
TheDeltaElektronikaPSC-ETH,PSC-488 andthePSC-232controllers
can be built inside the unit.
Voltage and current can easily be programmed and read back. Also all
the status outputs can be read by the computer.
12) MONITORING OUTPUTS
The monitor outputs give a voltage 0 - 5 V proportional to the output cur-
rent or voltage. The output current can easily be measured using the
I-monitor (see fig. 3- 6). Themonitor outputsare buffered withop-amp’s
and protected with series resistors and parallel zeners (see fig. 3- 7).
The table in fig. 3- 5 shows the impedance levels of the monitoring out-
puts.
For using Imon on a pulsating load, see paragraph 20) of this chapter.
13) +12 V ON PROGRAMMING CONNECTOR
The+12Vontheprogrammingconnectorcanbeusedtosupplyexternal
circuits. The output is current limited, but should not be overloaded. The
fuseF27_3onpcbP647couldblow.ThefuseF27_3alsoprotectsthein-
ternal circuit, in case an external high voltage is applied by accident.
Note: this fuse is a special 600 V type, always replace with the same
type.
14) STATUS OUTPUTS
Allthestatusoutputsarelogicoutputs. Logic"0"meanstheoutputis0V,
logic "1" means theoutput is 5 V(Ro = 500 Ohm). This makes itpossible
to drive directly: an opto-coupler, a TTL gate or a CMOS gate.
TheLimit StatusorLIM-statusis"1"incasetheoutputvoltageorcurrent
reaches the limit setting. Which limit circuit is active can be seen on the
front panel LED’s.
fig. 3- 5
Connections ANALOG PROG. CONNECTOR
pin Description, see par.12)...17) for details
1Ø, return of reference, prog. inputs and
monitor outputs (Ro = 1.2 Ohm).
2current monitor output 0 - 5 V
(Ro = 1.2 Ohm, Io max = 4 mA)
3current programming input (0 - 5 V),
Ri = 8 MOhm
4CC status output, logic 1 = CC mode
(5 V / 500 Ohm)
5Remote ShutDown (4 - 12 V),
Ri = 5 kOhm
6PSOL status output, logic 1 = PSOL
(5 V / 500 Ohm)
7+12 V output
(Ro = 3 Ohm, Io max = 0.2 A)
8Ø, return of status outputs, +12 V
and remote ShutDown
9reference voltage 5.1 V
(Ro = 1.2 Ohm, Io max = 4 mA)
10 voltage monitor output 0 - 5V
Ro = 1.2 Ohm, Io max = 4 mA)
11 voltage programming input (0 - 5 V)
Ri = 8 MOhm
12 OT - status output, logic 1 = OT
(5 V / 500 Ohm)
13 LIM - status output, logic 1 = LIM
(5 V / 500 Ohm)
14 DCF - status output, logic 1 = DCF
(5 V / 500 Ohm)
15 ACF - status output, logic 1 = ACF
(5 V / 500 Ohm)
V
A
Imon
0-5V
Vmon
0-5V
Return of
ref, prog, mon.
fig. 3- 6
External meters
using monitor outputs
fig. 3- 7
Buffered monitor outputs
(internal circuit)

SM1500 GENERAL
rev. August 2018 DELTA ELEKTRONIKA B.V. Page 3 - 3
The Over Temperature Status or OT status is "1" in case of an over temperature,
the OT LED will be on and the output shuts down. As a pre-warning the OT LED
starts to blink when the unit runs hot but the situation of over temperature is not
reached yet. The status will still be low when the LED is blinking.
The Current Control Status or CC-status output is "1" when the unit is in
CC-mode.
ThePowerSinkOverLoadStatusor PSOL-status output is"1"when theoptional
Power Sink is overloaded or overheated.
The AC-Fail Status or ACF-status output is "1" when the input voltage is below
115V(peak, notrms)formore than10 ms.NotethatifyouwanttheACF-statusto
switch before the DCF-status, the hold-up time has to be > 10 ms. This can be
achieved by reducing the load, see paragraph 25) of this chapter.
The DC-Fail Status or DCF-status output is "1" when the output voltage is either
5% below or above the set point.
WhentheunitisinCC-mode,DCFwillalwaysbe "1",seepreviousparagraph7).
15) STATUS RELAY OUTPUTS
The power supply has 2 status relay outputs, with each a change-over contact.
They are connected to connector CON D. The pins 1, 2, 3 are connected to the
DCF-relay and pins 4, 5, 6 to the ACF-relay (see fig. 3- 10). Pin 1 is the lower
output, closest to SW1.
fig. 3- 8Location of output terminals and analog programming connector
CON A Interlock Connector paragraph 18)
CON B MasterConnectorforMaster/Slaveoperation(output) paragraph 31)
CON C Slave Connector for Master / Slave operation (input) paragraph 31)
CON D Relay Outputs, contacts 1 - 6 ACF / DCF paragraph 15)
CON E Analog Programming Connector paragraph 9)
CON F PSC-ETH, user inputs
PSC-232, from PC or previous PSC (optional) paragraph 11)
CON G PSC-ETH, user outputs
PSC-232, to next PSC (optional) paragraph 11)
CON H PSC-ETH (optional) or
PSC-488 (optional) or
ISO AMP CARD (optional)
paragraph 10), 11)
SW 1 Various settings paragraph 16)
SW 2 Settings for PSC-488 and PSC-232 (optional) -
fig. 3- 9Connectors and switches on the rear panel
fig. 3- 10
Status relay outputs on CON D.
This situation gives the relay
positions during fault condition.
Connector D numbering
pin6
...
...
pin2
pin1

GENERAL SM1500
Page 3 - 4DELTA ELEKTRONIKA B.V. rev. August 2018
16) FUNCTION SWITCHES ON SW1
In the above table the functions of the DIP switches 1-4 of switch
SW1 (rear side) are explained. Also see fig. 3- 11.
17) REMOTE SHUTDOWN (RSD)
A voltage of +4 V...+12 V on the Remote ShutDown input on the
programmingconnectorCONEwillswitchofftheoutputoftheunit.
It is also possible to use a relay contact or a switch to shut the unit
down (see fig. 3-12).
In standby mode the power supply consumes very little power.
18) INTERLOCK
The Interlock connector (CON A) has 2 inputs which have to be
connectedtogethertoenabletheunit.Assoonthisconnectionisin-
terrupted,theoutputoftheunitshutsdown.Itcanbeusedincombi-
nation with door contacts (safety precaution) or as an emergency
stop.
Incasetheconnectionisinterruptedthe RSDLEDwilllight.Incon-
trast with Remote ShutDown, also the DCF LED will be on, DCF
status will be high and the relay contact will change. Once the in-
puts are reconnected, the output will be on again.
The interlock circuit is at the same level as the analog ground , the
S-andthe- output.Theinterlockcircuitneedsvoltagefreecontacts
andcannotbeconnectedinparallelorserieswithotherinterlocks.
19) PROGRAMMING SPEED
The rise and fall time is measured with a step waveform at the CV
prog. input. Programming from a low to a high output voltage is
nearly load independent, but programming down to a low voltage
takes more time on lighter loads. This is caused by the output ca-
pacitors, which can only be discharged by the load because the
power supply cannot sink current. With the Power Sink option,
also the programming down speed is nearly load independent.
WhenhavingaunitwithaFastProgrammingoption,theriseand
fall time is 5 to 25 times faster (see datasheet). The programming
source must be floating or otherwise an ISO AMP CARD must be
used, a non-floating source will result in slope distortion.
Forafastprogrammingunititisgenerallynotrecommendedtouse
remotesensing orserial / paralleloperation. Consult factory forad-
vice. Note that the output ripple is higher.
20) PULSATING LOAD
To avoid overheating the output capacitors, the AC component of
the load current should be limited (see fig. 3- 13).
One method of decreasing the AC current through the output ca-
pacitor is by using a large external electrolytic capacitor in parallel
with theload. Care must betaken so that the capacitorin combina-
tionwiththeleadinductancewillnotformaseriesresonantcircuit!
When using remote sensing on a pulsating load (for instance a
DC-motor), use a capacitor in series with a resistor over the load
(see fig. 3- 14). Like this the AC-component caused by the pulsat-
ing of the load is filtered.
Note: in case ofa pulsating load, theI monitor voltage willnot ex-
actlymatchtheoutput current. Thisis mainlycaused bythecurrent
through the output capacitors. Remote sensing will worsen this ef-
fect.
21) INSULATION
For safety the insulation of the separating components (transform-
ers) between input andoutput is tested at 3750 Vrmsduring 1 min-
ute. This is tested before assembly.
Switch no. LEFT position RIGHT position Default Setting
SW 1 - 1 Programming via 15pole con-
nector CON E (analog). Optional programming with e.g. PSC-232,PSC-488,ISOAMPCARD Left
SW 1 - 2 ‘Output On’ after mains on ‘Output Off’ after mains on Right
SW 1 - 3 DCF LED enabled DCF LED disabled (DCF status and
DCF relay are still enabled) Left
SW 1 - 4 ParallelMaster/Slaveoperation Series Master / Slave operation Left
fig. 3- 11 Settings of DIP switch Sw1.
fig. 3- 12
Remote ShutDown using a relay contact
fig. 3- 13
Pulsating load current
fig. 3- 14
fig. 3- 15
Insulation test voltages
Left
Right SW1-4
SW1-3
SW1-2
SW1-1

SM1500 GENERAL
rev. August 2018 DELTA ELEKTRONIKA B.V. Page 3 - 5
Warning! The 3750 Vrms cannot be tested afterwards on the
assembled unit because the insulation between the compo-
nents on the input side to the case (like the bridge rectifier) is
specified at 2500Vrms. Since the insulation output - case islow
(only 600 V DC) the insulation of the primary components to
case will break down when 3750 Vrms is applied between input
andoutput(2500Vrms+ 600V DC<3750Vrms)(seealsofig.3
- 15).
Note: when testing the insulation, take care to charge and dis-
charge the capacitors between input - case and output - case
slowly (e.g. in one second). This to prevent high peak currents,
which could destroy the power supply. Make sure to discharge
the capacitors completely before using it again.
22) RFI SUPPRESSION
Both the input and output have RFI filters, resulting in very low
conducted RFI to the line and load. Due to the output filter the
output voltage is very clean, having almost no spikes.
23) OPERATING TEMPERATURE
At full power the operating temperature range is –20 to +50 °C.
From50 to 60 °C theoutputcurrent has tobe deratedlinearlyto
75 % at 60 °C (see fig. 3- 16). These temperatures hold for nor-
mal use, i.e. the ventilation openings on the left and right side
must be free.
24) THERMAL PROTECTION
A thermal switch shuts down the output in case of insufficient
cooling.The OT status will be high. After cooling down the unit
will start working again.
TheOT-LEDon the front panel will be on and the OT-statussig-
nal will be "1" in case of a tripped thermal protection.
As a pre-warning the OT-LEDblinks (status willstill be low), this
will start before the power supply shuts down.
25) HOLD - UP TIME
Thehold-uptimedependsontheloadandtheoutputvoltage.
A lighter load or a lower output voltage results in a longer hold -
up time (see fig. 3- 17).
26) TURN ON DELAY
Theoutputvoltageisavailableabout0.5saftermainsswitchon.
27) INRUSH CURRENT
The inrush current is limited with a special circuit.
Repeatedly switching on andoff does not change the maximum
peak current.
Switching on and off at a fast rate can overheat the inrush cur-
rent limiter. With the result that the unit does not start anymore.
After cooling down (mains switched off) it will be OK again.
28) REMOTE SENSING
Thevoltageatthe loadcanbekeptconstantby remotesensing.
This feature is not recommended for normal use but only when
the load voltage is not allowed to vary a few millivolts. Always
use a shielded cable for sensing.
In order to compensate for the voltage drop across the load
leads, the unit will have to supply a higher voltage (see fig. 3-
18):Uout=(voltagedropacrosseachlead)+(voltageacrosstheload).
The voltage limit reads the voltage directly at the output termi-
nals. The setting for thelimit must therefore be increased by the
total voltage drop across the load leads.
The voltage display on the front panel and the voltage monitor
output on CON E are connected to the sense leads and there-
fore read the voltage across the load and not the voltage on the
output terminals.
The sense leads are protected against accidental interrup-
tion. The maximum voltage between the output terminals and
the sense inputs is limited at 2.5 V.
For sensing on a pulsating load, see par. 20) of this chapter.
fig. 3- 16
Operating temperature ranges
fig. 3- 17
Hold-up time vs Vout with Iout as a parameter
fig. 3- 18
Remote sensing, voltage drop in load leads sub-
fig. 3- 19
Master / Slave series operation

GENERAL SM1500
Page 3 - 6DELTA ELEKTRONIKA B.V. rev. August 2018
29) SERIES OPERATION
Series operation isallowed up to 600V total voltage. The power suppliescan
be connected in series without special precautions.
Foreasiercontrol,Master/Slaveoperationisrecommended(seefig. 3-19).
By using the Master / Slave series feature a dual tracking power supply can
be made with one unit as master and one as slave.
For series operation in combination with Power Sink option, all units must
have a Power Sink built inside otherwise no power can be absorbed.
30) PARALLEL OPERATION
Paralleling of the units has no limitations. The power supplies can be con-
nected in parallel without special precautions. For easier control, Master /
Slave operation is recommended (see fig. 3- 19 and fig. 3- 20).
Normal parallel operation of Fast Programming units can give problems,
each combination has to be tested first, in combination with the load !
For parallel operation in combination with Power Sink option, only one unit
can have a Power Sink. Refer to Power Sink manual for details and restric-
tions.
31) MASTER / SLAVE OPERATION
The Master / Slave feature makes it possible to use the power supplies as
building blocks to form one large unit (see fig. 3- 20).
Mixed parallel - series operation is also possible, to a maximum of 600 V.
Theresultingcombination ofunitsbehaves likeone power supplyandcan be
manually controlled or programmed on the master. Fig. 3- 21 shows a com-
puter controlled M/S parallel combination.
Connect the different units with standard RJ45 cables (see fig 3- 22), using
CONBandCONContherearside.WithDIPswitch4ofswitchSW1thePar-
allel or Series mode can be selected.
The slaves will follow the master. The result is true current or voltage shar-
ing in the parallel or series mode respectively.
Note: Master / Slave parallel operation is not recommended for more
than 3 units or in combination with Fast Programming option.
Consult factory for a solution.
fig. 3- 20
Master / Slave parallel operation
fig. 3- 21
The Master / Slave combination can also
be programmed with the interfaces
PSC-ETH, PSC-488 or the PSC-232
fig 3- 22
Use standard UTP cables
(RJ45) for Master / Slave
operation.
Master unit:
Connect CON B
to Slave1.
Slave unit:
Connect CON C
to Master.
Connect CON B
to Slave2.
Warning:
Never connect CON C
to CON C !
See page 4 - 3 for more
details.

SM1500 GENERAL
rev. August 2018 DELTA ELEKTRONIKA B.V. Page 3 - 7
32) VOLTAGE AND CURRENT LIMIT
The Voltage and Current Limits maintain the output to a safe preset value.
They do not trip, so no resetting is needed after a fault. It can be very handy to
have hardware limits when the power supply is programmed.
The limits can easily be set by pressing the DISPLAY LIMITS button and
adjusting the limit potentiometers with a screwdriver. The LED’s next to the
limitpotmeters indicate the activity of each limit, also the LIM-status output will
be "1".
The Voltage Limit will protect your circuit from unwanted high voltages. A high
outputvoltagecouldbecausedbyaccidentalinterruptionofleads,accidentally
turning up the voltage potmeter, a programming error or a defect in the power
supply. The Voltage Limitcircuit uses a separate voltage divider connected di-
rectly to the output terminals.
The Current Limit protects your circuit from unwanted high currents.
Note: In the Autoranging units the limit circuits are also used as "range limits".
This can be confusing. Example: a SM52-AR-60 operating in the range above
26 V will automatically reduce the limit setting to a maximum of 30 A.
Warning: if this unit operates in the range below 26 V, this setting is 60 A !
Takecaretheoutput cabling and the loadcanwithstand sucha high current or
otherwise reduce the limit setting to a lower value.
33) POTENTIOMETERS AND ENCODERS
°Standard: -CV and CC potentiometers with knobs at front panel,
Voltage Limit and Current Limit potentiometers with
screwdriver adjustment at the front panel.
°Option P001: -Screwdriver adjustment for CV, CC, Voltage Limit and
Current Limit at the front panel (see fig. 3- 23).
°Option P220: -Digital encoders for CV and CC setting with a very long
life time and intelligent functions (e.g. Keylock).
Setting of CV-limit and CC-limit with screwdriver adjust-
ment analog potentiometers at the front panel.
34) COOLING
Alownoiseblower coolstheunit.Thespeedofthefandependsonthetemper-
ature of the internal heatsink. Normally at 50 °C ambient and full load the fan
will not work at full speed.
Aspecialfeatureisthatthefanblowsthroughatunnelwheretheheatsinkis
situated, the delicate control circuitry is separated and will not be in the airflow
path (see fig. 3- 24).
Becausetheairentersattheleftandexitsattherightside,itispossibletostack
thepowersupplies,nodistancebetweentheunitsisrequired.Onlytheventila-
tion openings at the left and right side should be free.
For long life the temperature of the air entering on the left side, should be
below 35 °C under normal conditions. Under extreme conditions it should be
below 50 °C.
Note: The control circuit makes thefan start in apulsating mode, during which
period it can produce a high pitched sound. This is normal.
35) DIMENSIONS
fig. 3- 23
Screwdriver adjustment at front panel
fig. 3- 24
The fan blows through the tunnel,
where the heatsink is situated

GENERAL SM1500
Page 4 - 1DELTA ELEKTRONIKA B.V. rev. August 2018
4INSTALLATION
1) HUMIDITY & CONDENSATION
•During normal operation, humidity will not harm the power sup-
ply, provided the air is not aggressive. The heat normally pro-
duced in the power supply will keep it dry.
•Avoid condensation inside the power supply, to prevent
break-down. Condensation can occur during a period the power
supply has been switched off (or operating at no load) and the
ambient temperature is increasing. Always allow the power sup-
ply to dry before switching it on again.
2) TEMPERATURE & COOLING
•The storage temperature range is –40 to +85 °C.
•The operating temperature range at full load is –20 to +50 °C.
This temperature range only holds when the air-intakes and
air-outletsareunobstructedandthe temperatureoftheair-intake
is not higher than +50 °C.
•When the power supplyis mounted in acabinet, please note that
the temperature of the air-intake should be kept low and avoid a
short circuit in the airflow i.e. the hot air leaving the air-outlets
entering the air-intakes again.
•Please note: a lower temperature extends the lifetime of the
power supply.
3) 19" RACK MOUNTING
•On both sides in the rack, mount a proper support slide that can
hold theweight of the unit. It isadvised touse a separate slidefor
each unit.
•Afterplacingtheunit(s)ontheslide,addall4screwstomountthe
front panels of the power supplies to the vertical rack posts. Use
proper screws intended for keeping equipment of this weight in
position.
•Assuming the rack is deliberately designed for the weight, stack-
ing of the units is allowed without limitations. See previous para-
graph for cooling instructions.
4) OPERATING THE UNIT FOR THE FIRST TIME
•Checkthereisnocondensationontheunit.Ifthereis,allowsome
time to dry.
•Checkthereisalinkbetween+and S+ andbetween–and S–on
the SENSE BLOCK (on rear panel).
•Check there is alink between the inputs of theInterlock (CON A,
rear panel).
•Set the CV and CC potentiometers to minimum (fully anti clock-
wise). ForunitswithOptionP220, thisisnotneeded.Theseunits
are set to start at 0 V - 0 A when operated for the first time.
•For recommended cable diameters and torque (see table 4-1).
•With high output current make sure to use low resistive con-
nections between the power supply and the load:
- Mount the cable lugs directly on the tinned output strips
followed by a washer, a split washer and a nut (see fig. 4- 1).
Always in this order!
- Never place washers between the lugs and the strips
because this can result in excessive heat!
- Only use nuts and washers supplied with the unit.
•Switch on unit.
•Disable the Keylock function, see next paragraph 5).
•Check the unit isnot in Remote CVor Remote CC (LED’s for this
function should be off). Press the REMOTE/LOCAL button until
both LED’s are off.
•Turn on the output by pressing the OUTPUT ON/OFF button.
•TurnboththeCVandCCpotentiometerafewturnsclockwise.
A voltage should now be present on the output.
•By pressing the DISPLAY CV/CC SETTING button, the meters
will show the setting of the CV and CC potentiometer.
fig. 4- 1
Low resistive cable connection by mounting the
cables directly on the tinned output strips
fig. 4- 2
Programming by voltage:
left voltage -, right current programming
fig. 4- 3
Programming by current
left voltage -, right current programming
Unit Output cables
[mm2] Bolts Torque [Nm]
SM15-100 16 M8 20
SM35-45 6 M8 20
SM52-30 5 M8 20
SM52AR60 10 M8 20
SM70-22 4 M8 20
SM120-13 2.5 M8 20
SM300-5 1 M8 20
SM400AR8 1.5 M8 20
table 4- 1
Recommended cable diameters and
mounting torque
Warning:carefullyreadthechapter"SafetyInstructions"
in this manual before operating the unit!

SM1500 GENERAL
rev. August 2018 DELTA ELEKTRONIKA B.V. Page 4 - 2
•By pressing the DISPLAY LIMITS button, the voltmeter will
show the setting of the CV-limit and the CC-limit
potentiometer.
•Check the cooling of the unit is not obstructed.
5) KEYLOCK
•If the function KEYLOCK is activated, it is no longer possible
to operate the REMOTE/LOCAL button and the OUTPUT
ON/OFFbutton.Thisfunctioncan beusefultoprotect theout-
put from accidental shutdown. The function KEYLOCK does
not influence the operating of the CV, CC, CV-limit and
CC-limit potentiometers.
•Units with digital encoders:
For units with Option P220 also the digital encoders for CV
and CC are disabled with the Keylock function. This means
settings of the voltage and current do not change when the
encodersareoperated.Itisstillpossibletooperatetheanalog
CV-limit and CC-limit potentiometers.
•Activate Keylock:
Pressing the buttons DISPLAY SETTINGS and DISPLAY
LIMITS at the same time for more than 3 seconds, activates
the function KEYLOCK. The moment this function is acti-
vated, the LED’s for REMOTE CV / CC and forOUTPUT ON
will blink a few times.
•Disable Keylock:
Pressing the same buttons again for 3 seconds, disables the
Keylock function. The LED’s for REMOTE CV / CC and for
OUTPUT ON will blink again to indicate the new setting.
6) ANALOG PROGRAMMING
•Set DIP switch 1 of SW1 in position RIGHT to select CON E
for programming.
•Disable Keylock.
•SettheunitinREMOTECVforvoltageprogrammingand/orin
REMOTE CC for current programming.
UsetheREMOTE/LOCALbuttonandpushthisbuttonseveral
times until the right setting is activated.
Note that pushing the REMOTE/LOCAL button will shutdown
the output to avoid accidental damage to the load.
•Connect the programming voltage source(s) (0 - 5 V) to the
analogprogramming connectorCONEon therear panel(see
fig.4- 2 and fig. 4- 3). Always use ashielded cable (max. 30
meter) for programming.
•Turn the output on again with the OUTPUT ON/OFF button
•If only the voltage is programmed, the maximum current can
still be set with the CC knob on the front panel and vice versa.
IfthisisnotdesirabletheunitcanbeorderedwithOptionP001
or Option P220 in order to have a fixed setting for the CV and
the CC knob on the front panel, see also par. 33) in previous
chapter "Descriptions".
•To avoid hum or noise, the programming cable may have to
be twisted in some cases.
•Toprogramtheunitbycurrentinsteadofvoltage,simplyusea
parallel resistor as a current to voltage converter.
•Pressing the DISPLAY SETTINGS button will show the pro-
grammed values for CV and CC.
•CAUTION:Theanaloginputsarenotisolatedfromtheoutput.
The Øof the prog. input (pin 1) is internally connected to the
S–, the S– is connected to the negative output. To protect the
internalwiringa650mAself-resettingfuseisconnectedinse-
ries (F27_1 on P647). To avoid earth loops, use an isolated
programming source. If this is not possible see next para-
graph 7), for using the optional ISO AMP CARD.
7) ANALOG PROGRAMMINGWITH ISOAMP CARD
•ForprogrammingviatheISOAMPCARD,setDIPswitch1on
SW1 in the position OFF.
•When the ISO AMP CARD is built inside the unit, CON E has
been covered. Use CON H instead. The pinning of CON H is
equal to the pinning of CON E.
•Forfurtheroperatinginstructions,seepreviousparagraph6).
fig. 4- 4
Remote control
fig. 4- 5
Local sensing
fig. 4- 6
Remote sensing with shielded wires
fig. 4- 7
Remote sensing, voltage drop in load leads sub-
tracts from max. output

INSTALLATION SM1500
Page 4 - 3DELTA ELEKTRONIKA B.V. rev. August 2018
8) Ethernet / IEEE488 / RS232 PROGRAMMING
•Set DIP switch 1 on SW1 in position OFF for programming
with the PSC-ETH, the PSC-488 or the PSC-232.
WithDIPswitch1inthisposition,thesignalsVprog(pin11)
and Iprog (pin 3) are disabled on CON E. All the other sig-
nals can still be used. For Ethernet programming CON H
must be used, CON F and G can be used for the user in-
and outputs.
ForIEEE488alsoCONHmustbeusedforprogramming.
For RS232 programming CON F and G must be used.
•Set the unit in REMOTE CV for voltage programming
and/or in REMOTE CC for current programming using the
SCPI commands (see manual PSC) or using the RE-
MOTE/LOCAL button on the unit. Push this button several
times until the right setting is activated. Setting the unit in
REMOTE or LOCAL will cause the output to shutdown to
avoid accidental damage tothe load. Turn it onagain using
theSCPIcommandorwiththeOUTPUTON/OFFbutton.
•Set DIP switch 1 on SW1 in position ON to enable CON E
again for analog programming.
Inthis positionvoltageandcurrentprogramming onCON F
and H is disabled. The other functions and signals can still
be programmed and read back.
9) MONITORING OUTPUTS
•The 5 V level is compatible with most interfaces.
•The monitoring outputs can drive a meter directly
(see fig. 4- 4).
10) STATUS OUTPUTS
•The status outputs have a separate Øconnection (pin 8) to
avoidunwantedoffsetsintheprogramming.Thispinispro-
tectedwitha650mAselfresettingfuse(F27_2onP647).
11) REMOTE SENSING
•Remove the links on the SENSE BLOCK (on rear panel)
and connect sense leads (thin shielded measuring wires)
to S+ and S– (see fig 4- 5 and fig. 4- 6).
•With remote sensing the voltage on the load can be kept
constant. The voltage drop in the load leads will be com-
pensated.Thisfeatureisnotrecommendedfornormaluse,
because it can easily give problems.
•Max. 2 V per load lead can be compensated. Note that the
voltage drop in the leads decreases the max. output volt-
age rating. In fig. 4- 7 it can be seen that on a 15 V power
supply only 11 V will be available on the load when 2x 2 V
compensation is used.
•In order to prevent interference, it is advisable to twist the
sense leads. To minimize the inductance in the load leads
keep the leads close to each other. The inductance of the
loads leads could give a problem with pulsating loads. In
this case a large electrolytic capacitor (Cd) in series with a
dampingresistor(Rd)both in parallel with the load will (see
fig. 4- 6). Check that the capacitor Cd in combination with
theloadleadsandresistorRdformsawelldampedcircuit.
•Since the voltmeter is internally connected to the sensing
terminals, it will automatically indicate the voltage on the
load. Note that the voltage measured on the load will be
lower than on the output terminals.
•TheOver VoltageLimitmeasures thevoltageon theoutput
terminals, so the OVL setting should be increased by the
total voltage drop in the load leads.
12) BATTERY CHARGER
•The CV / CC regulated power supplies are ideal battery
chargers. Once the output is set at the correct voltage the
battery will charge constantly without overcharging.
This can be useful for emergency power systems.
•Protective measures
Use a CIRCUIT BREAKER in series in order to protect the
power supply from accidental reverse connection (see
fig.4- 8). The circuit breakershould have a DCvoltage rat-
ing twice the battery voltage. Use the very fast type (Z), a
Suggested circuit breakers for protection power supply
Model Type number
circuit breaker Brand Remarks
SM15-100 HTI101 B 100 GE -
SM35-45 S281 UC-Z 50 ABB -
SM52-30 S281 UC-Z 32 ABB extra parallel diode
on output needed
BYV255V-200
SM52AR60 S281 UC-Z 63 ABB extra parallel diode
on output needed
BYV255V-200
SM70-22 S281 UC-Z 25 ABB -
SM120-13 S281 UC-Z 16 ABB extra parallel diode
on output needed
BYV255V-200
SM300-5 S282 UC-Z 6
use with 2 poles
in series
ABB extra parallel diode
on output needed
2xBYT261PIV400
SM400AR8 S282 UC-Z 10
use with 2 poles
in series
ABB extra parallel diode
on output needed
2xBYT261PIV1000
table 4- 2
fig. 4- 8
Charging battery with a circuit breaker in series
fig. 4- 9
Remote ShutDown with switch
fig. 4- 10
Master / Slave series connection

SM1500 INSTALLATION
rev. August 2018 DELTA ELEKTRONIKA B.V. Page 4 - 4
type meant for protecting semiconductors (see table 4
- 2).
The unit has areverse diode in parallelwith the output,
this diode and the wiring cannot withstand the thou-
sands of amperes supplied by a wrongly connected
battery.
13) REMOTE SHUTDOWN
•The Remote ShutDown can be operated on CON E by
a
voltage of +4 V...+12 V or by a relay contact between
Vref and Remote ShutDown (pin 9 and 5) (see fig.
4- 9).
•WhentheunitisprogrammedwithanoptionalPSC,a
software command can be used for Remote
ShutDown.
•In the Remote ShutDown condition, the RSD LED will
light.
The DCF LED, DCF status and the DCF relay will be
off.
Important:IfthelinkfromtheInterlockconnector(CON
A) has been removed, the RSD LED will be on, but in
this
condition also the DCF LED, the DCF status and the
DCF relay will be on.
14) MASTER / SLAVE SERIES OPERATION
•Connect output terminals and test system in
normal series operation. Ensure that all (output)
power connections are reliable.
•The voltage drop in the connecting leads between the
units should be kept < 10 mV.
•Switch off all units. Connect units as shown in fig. 4-
10.
Onall unitssetswitchSW1-4inpositionOFFtosetthe
units in M/S series mode (see page 3-4).
•Warning: never connect CON C to CON C !
This can damage the units.
•UsestandardUTPcables(RJ45) toconnecttheslaves
with the master via CON B and CON C.
•Afterturningtheunitsonagain,theslaveswillbeinRe-
mote CV mode and the Keylock, see previous para-
graph 5) is activated. This is because the unit
automatically detects the presence of the RJ45 con-
nector in CON C (if this cable is connected to another
unit).
If the RJ45 connector is removed from CON C when
theunitisturnedon,theoutputwillshutdowntoavoid
accidental damage.
If the cable is inserted when the unit is turned on, the
output shuts down, the unit changes to Remote CV /
CC, the Keylock will be activated and the output will
turn back on.
If DIP switch 4 of SW1 is operated when the unit is
turned on, the output will shutdown to avoid accidental
damage.
•The max. number of slaves is only limited by the max.
total voltage of 600 V.
15) MASTER / SLAVE PARALLEL OPERATION
•Note: Master / Slave parallel is not recommended
for more than 3 units, consult factory for using
more than 3 power supplies in parallel.
•First, connect output terminals and test system in
normal parallel operation. Ensure that all power
connections are reliable.
•Second, switch off all units. To connect the slaves with
the master via CON B and CON C, use standard RJ45
connectors according to fig. 4- 11.
On all units put DIP switch 4 of SW1 in position ON to
set the units in M/S parallel mode. In this mode the
DCFLED,DCFrelayandDCFstatusontheslavesare
fig. 4- 11
Master / Slave parallel connections
fig. 4- 12
Master / Slave mixed series - parallel connections

INSTALLATION SM1500
Page 4 - 5DELTA ELEKTRONIKA B.V. rev. August 2018
disabled because the slaves are always in CC mode.
•After turning the units on again, the slaves will be in
Remote CC mode and the Keylock, see previous paragraph 5) is
activated. This is because the unit automatically detects the pres-
enceof the RJ45connectorin CONC (if thiscableisconnected to
another unit).
If the RJ45 connector is removed from CON C when the unit is
turnedon,theoutputwillshutdowntoavoidaccidentaldamage.
If the cable is inserted when the unit is turned on, the output shuts
down,theunitchangestoRemoteCV/ CC,theKeylockwillbeac-
tivated and the output will turn back on.
If DIP switch 4 of SW1 is operated when the unit is turned on, the
output will shutdown to avoid accidental damage.
•Stack the units to create a minimum distance between the units.
Keep the load close to the master.
Use copper strips (preferred) or short thick cables to connect the
units. Make sure the strips are mounted with a minimum length to
keep the voltage drop between a unit and the bus bar below 10
mV. Also keep the strips close to each other to have a low induc-
tance.
Not following these instructions can cause instability.
•The S- and S+ could be connected to the load if
desired, but this is not recommended because of the complexity
and possible instability.
16) PARALLEL OPERATION OF FAST
PROGRAMMING VERSIONS:
•Master / Slave operation is not recommended.
•Normal parallel operation can give problems, each combination
has to be tested first in combination with the load.
17) MASTER / SLAVE MIXED SERIES /
PARALLEL OPERATION
•Forcomplexcombinationsasmixedseries-parallel,alwaysusea
MASTER / SLAVE SERIES ADAPTER.
•See fig. 4-12 for anexample of how toconnect 2 units in series in
parallel with 2 units in series, controlled by 1 master.
•Set the programming mode with the knob Remote / Local on the
front panel. The serial slaves must be in Remote CV- and
CC-mode. The parallel slave must be in Remote CC-mode and
the CV-potmeter must be fully opened.
•Note: A Master / Slave combination can always be
programmed, also with the IEEE488/RS232 controller
(PSC-448/PSC-232 (both δ-products)).

SM1500 TROUBLE SHOOTING
rev. August 2018 DELTA ELEKTRONIKA B.V. Page 5 - 1
5TROUBLE SHOOTING
1GENERAL
•In case you need assistance for repairing a unit, please contact
our engineers using the address "Sup-
[e-mail]".
•In case you want us to repair the unit, please first fill out the
RMA-form before sending the unit to us. Adding a detailed fault
description will help us to repair the unit as soon as possible.
On our website www.DeltaPowerSupplies.com the RMA-form
can be found under 'Support'.
2NO OUTPUT (manual control)
•Check the LEDs ‘Remote CV’ and ‘Remote CC’ on the front
panel, they should be off. Disable Keylock and press the RE-
MOTE/LOCAL button to turn both LEDs off.
•The LED ‘Output On’ should be on. If this LED is off, disable
Keylock and push the button ‘OUTPUT ON/OFF’.
•Check the connections on the SENSE BLOCK (at rear panel),
there should be a link between + and S+ and between – and S–
(see fig. 5- 3).
•Check if there is a link in the Interlock connector (if not, the RSD
LED will be on).
•Set both the CV- and CC-limit potentiometer (at front panel) at
maximum (fully clockwise).
•TurnboththeCVandCCpotentiometersafewturnsclockwise.
A voltage should be present on the output (for units with Option
P220 first remove the Keylock function before the CV and CC
knobs can be turned, see par. 5) in previous chapter
"INSTALLATION").
•Disconnect the cables from the output and check if now there's a
voltage present on the output. If this is the situation, use a load
withahigherimpedanceoruseasecondpowersupplyinparallel.
3PROGRAMMING DOES NOT WORK OK
•Check the unit is in Remote mode (Remote CV and/or Remote
CC LED should be on).
•The unit works OK in manual control, but in programming
mode the output voltage / current has a large error.
ProbablythefuseinserieswithØ(pin1)of programmingconnec-
tortripped,thefuse(F27_1=650mA)isaself-resettingtype(see
fig. 5- 1).
•To check the fuse (F27_1) measure the voltage between Øand
the minus output, during the fault condition. The voltage should
only bea few mV,a high voltage meansthat an unwanted current
is flowing through pin 1 of the prog. connector.
Please check why currentis flowing through pin1 (see next para-
graph) and fig. 5- 2).
4PROGRAMMING OFFSETS
•Unwanted offsets in the programming can be caused by
earth loops.
Fig.5- 2 shows a typical earthing problem. In casethe load has a
connection to earth and the programming source as well, prob-
lems could occur. Improper choice of the earthing point of the
load can give a voltage drop of ∆V1. Connecting the minus or
zero to a separate earth connection can give a voltage drop of
∆V2. Because the internal wires of the programming input are
thin, the voltage drops ∆V1 and ∆V2 will be across the internal
wiring as well. Resulting in an error voltage in series with the pro-
gramming voltage.
•The best solution for this is to use a floating programming
source, a floating load or the optional internal ISO AMP CARD
(δ-product).
5STATUS OUTPUTS FAIL
•CheckfuseF27_2inserieswithØ(pin8ofCONE)(seefig.5-1).
To check the fuse measurethe voltage between Øandthe minus
output, a high voltage means too much current flowing through
the fuse. F27_2 = 650 mA, self resetting.
fig. 5- 1
Location of programming fuses on P647
P647 is situated directly behind the rear panel
fig. 5- 2
Unwanted programming offsets

TROUBLE SHOOTING SM1500
Page 5 - 2DELTA ELEKTRONIKA B.V. rev. August 2018
fig. 5- 3
For normal operation links should be connected
between S+ and + and between S– and –
6MASTER / SLAVE PARALLEL PROBLEMS
•Check the voltage drop of the wiring between the master and the
slaves is < 10 mV.
•Check the wiring has a low inductance.
7OUTPUT VOLTAGE IS HIGHER THAN SET VALUE
•Check connections on SENSE BLOCK (on rear panel), For nor-
mal operation there should be a link between + and S+ and be-
tween–andS–(seealsofig. 5-3).Whenremotesensingisused,
check the wires of the sensing.
8OT LED on
•The temperature of the internal heat sink is too high,
the output has been shutdown to avoid overheating.
•Check if the cooling fan is running.
•Checkif theairtemperatureoftheairinlet(left)isbelow50°Cand
the airflow is not obstructed.
9OT LED blinks
•The temperature of the internal heat sink isgetting too high, afur-
ther increase will shutdown the power supply.
•Check if the cooling fan is running properly.
•Check if the air temperature of the air inlets (left) is below 50 °C
and the airflow is not obstructed.
10 ACF LED on
•The input voltage is too low or was intermittent because of a bad
connection. Disconnect the mains, wait a few minutes and try
again.
As soon as the ACF LED Iights, the settings for Remote CV, Re-
moteCCandKeylockwill besaved.If theunit turnsbackon,it will
have the same settings. For the setting of Output On/Off after
turningtheunitbackon,thepositionofDIPswitch2onSW1isde-
termining.
IftheACFsituationlastsafew seconds, the outputwillshutdown.
The ACF problem has to be solved first, before the output can be
turned on again.
•Internal error, send unit for repair. See previous paragraph 1).
11 DCF LED on
•The output voltage is below the set voltage. This automatically
happens when the unit is in CC-mode (CC LED is on).
Also with an interrupted Interlock connector, the DCF LED will be
on.
•Internal error, send unit for repair. See previous paragraph 1).
12 PSOL LED on
•The Power Sink is in overload or the temperature of the Power
Sink is too high. See datasheet of the Power Sink option for fur-
ther details.
13 NO LEDS on
•Check input.
•Do not try to repair, but send for repair. See previous paragraph
1).
14 Blinking LEDs REMOTE CV, REMOTE CC and
OUTPUT ON
•This indicates the Keylock function is activated, see previous
paragraph 5) in "operating manual".
15 OTHER
•If the problem persists, please fill out the RMA-form on our
websitewww.DeltaPowerSupplies.com.Seepreviousparagraph
1).

SM1500 MAINTENANCE & CALIBRATION
rev. August 2018 DELTA ELEKTRONIKA B.V. Page 6 - 1
6MAINTENANCE & CALIBRATION
1GENERAL
•The SM-series power supplies do not need any maintenance or
calibration.However, care must be taken that the cooling unit is
not obstructed.
2COOLING FAN
•Thebuiltupof dustontheimpellerofthefanandtheheat sinkfins
depends on the environment. Since the fan has over-capacity,
dust will not present a problem very quickly.
•The internal construction of the power supply is such that no dust
willreachthesensitivecontrolcircuitry,onlytheheatsinkinatun-
nel will be cooled by forced air (see fig. 6- 1).
•The thermal protection will shutdown the output in case of over-
heating, so the power supply will not be damaged.
•It is advisable to inspect the fan and the heat sink regularly.
3GALVANIC INDUSTRY
•For using the power supplies in the galvanic industry it is strongly
recommended to take precautions against an aggressive envi-
ronment.
•Anaggressiveenvironmentwithacid,salt,etc.canharmtheelec-
tronic components. Sometimes even the copper tracks on the
printed circuit boards dissolve.
•To avoid problems, the power supplies should be mounted in a
relatively clean room, or mounted in a cabinet receiving clean air
with over pressure, or a cabinet with a heat exchanger.
4CALIBRATION
•The power supplies are factory calibrated and normally need no
further calibration.
•Only in special situations, for example after repairing a unit, cali-
bration can be necessary.
5METER CALIBRATION
•DIGITAL METERS
The full scale indication can be calibrated with R25_31 and
R25_36 on P596 (see fig. 6- 2).
6SPECIAL CALIBRATIONS
•The following calibrations must be done by qualified personnel
only. Wrong calibration causes malfunction. These calibrations
are only needed after special repairs.
Warning ! Damage caused by a wrong calibration is not
warranted.
•CALIBRATING THE CURRENT
MONITOR OFFSET.
WithR26_73onP650the offset of the CCmonitorvoltagecan be
calibrated (see fig. 6- 3). The unit has to be unloaded, the output
voltage has to be turned off using the OUTPUT ON/OFF button.
MeasuretheoffsetvoltageoftheCCmonitorontheprogramming
connector. Calibrate the offset on a negative value between –1
mV and zero mV.
Warning! wrong calibration can damage the unit.
•CALIBRATING MAX. CURRENT RANGE or CALIBRATING CC
MONITOR FULL SCALE.
Short the output using a low resistive cable. Measure the output
current with an accurate shunt. The maximum output current can
be calibrated with R26_41. R26_41 is located on P650 (see
fig. 6- 3).
Program CC input with exactly 5.00 V.
Setoutput voltage toahighvalue,ensuringthe powersupplyisin
CC mode. Calibrate the current with R26_41 exactly on the rated
max. current.
Warning! Wrong calibration can damage the unit.
fig. 6- 1
The fan blows through an internal tunnel,
where the heatsink is situated.
Always take care to have the air outlet unob-
structed.
fig. 6- 2
Meter calibration with 25-turn potmeters on
P596
fig. 6- 3
Calibrating max. current and offset on P650.
full scale offset

SM1500 EU DECLARATION
rev. August 2018 DELTA ELEKTRONIKA B.V. Page 7 - 1
We
Delta Elektronika
Vissersdijk 4
4301 ND ZIERIKZEE
The Netherlands
Declare under sole responsibility that the following Power Supplies:
SM 15-100
SM 35-45
SM 52-30
SM 52-AR-60
SM 70-22
SM 120-13
SM 300-5
SM 400-AR-8
Meet the intent of Directives
2014/30/EU Electromagnetic Compatibility (EMC)
2014/35/EU Low Voltage Directive (LVD)
2011/65/EU Reduction of Hazardous Substances (RoHS2)
Compliance was demonstrated to the following specification as listed in the official Journal
of the European Communities:
EN 61000-6-3:2007 Generic Emissions (residential, light industrial)
EN 61000-3-2:2014 Power Harmonics
EN 61000-3-3:2013 Voltage fluctuation and flicker
EN 61000-6-1:2007 Generic Immunity (residential, light industrial)
EN 61000-6-2:2005 Generic Immunity (industrial environment)
EN 60950-1:2006 Safety of IT equipment
+A1:2010 + A11:2009 + A12:2011 + A2:2013
EN 61010:2010 Safety of electrical equipment for measurement, control and laboratory use
EN 50581:2012 Assessment of electrical and electronic products with respect to RoHS
EU Declaration of Conformity - SM1500-series
Managing director,
Zierikzee, August 2018
DC POWER SUPPLIES
DELTA ELEKTRONIKA B.V. Vissersdijk 4, 4301 ND
Zierikzee, the Netherlands
www.DeltaPowerSupplies.com
Tel. [phone]