TDK-Lambda HWS 1800T Series User manual

DA033-04-01H
-1-
TDK-Lambda
HWS1800T Series
INSTRUCTION MANUAL
HWS 1800T Series
Instruction Manual
BEFORE USING THE POWER SUPPLY UNIT
Be sure to read this instruction manual thoroughly before using this product. Pay attention to all cautions and warnings before using this
product. Incorrect usage could lead to an electrical shock, damage to the unit or a fire hazard.
DANGER
・
Never use this product in locations where flammable gas or ignitable substances are present.
INSTALLATION WARNING
・
When installing, ensure that work is done in accordance with the instruction manual. When installation is improper, there is risk of
e
lectric shock and
fi
r
e.
・
Installation shall be done by Service personnel with necessary and appropriate technical training and experience. There is a risk of
electric shock and fire.
・
Do not cover the product with cloth or paper etc. Do not place anything flammable around. This might cause damage, electric shock
or f
ir
e.
WARNING on USE
・
Do not touch this product or its internal components while circuit in operation, or shortly after shutdown. You may receive a burn.
・
While this product is operating, keep your hands and face away from it as you may be injured by an unexpected situation.
・
For products with no cover, do not touch them as there are high-voltage and high temperature parts inside. Touching them might
cause injury such as electric shock or burn.
・
There are cases where high voltage charge remains inside the product immediately after the input is cut off. Therefore, do not touch
even if they are not in operation as you might get injured due to high voltage and high temperature. You might also get electric shock
o
r burn.
・
Do not make unauthorized changes to this product nor remove the cover as you might get an electric shock or might damage the
product. We will not be held responsible after the product has been modified, changed or dis
-
assembled.
・
Do not use this product under unusual condition such as emission of smoke or abnormal smell and sound etc. Please stop using it
immediately and shut off the product. It might lead to fire and electric shock. In such cases, please contact us. Do not attempt repair
by yourself, a
s it is dangerous for the us
er
.
・
Do not operate and store these products in environments where condensation occurs due to moisture and humidity. It might lead fire
and electric shock.
・
Do not drop or apply shock to this product. It might cause failure. Do not operate these products mechanical stress is applied.
・
When necessary, this products is to be repaired only by us or our authorized agents. It is important that this product cannot be used in
hazardous environments (facilities such as nuclear power control system or life support
eq
u
ipment) without our written consent.
CAUTION on MOUNTING
・
Confirm connections to input/output terminals are correct as indicated in the instruction manual before switching on.
・
Input voltage, Output current, Output power, ambient temperature and ambient humidity should be kept within specifications,
otherwise the product will be damaged.
・
Input line, please use the wires as short and thick as possible.
・
Do not use this product in special environment with strong electromagnetic field, corrosive gas or conductive substances and direct
sunlight, or places where product is exposed to water
or rain.
・
Mount this product properly in accordance with the instruction manual, mounting direction and shall be properly ventilated.
・
Please shut down the input when connecting input and output of the product.
・
When installing in environment where conductive foreign, dust and liquid may be present, please consider penetration of above
foreign material in the power supply by installing filter, to pre
ven
t
t
rouble or malfunction.

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TDK-Lambda
HWS1800T Series
INSTRUCTION MANUAL
CAUTION on USE
・
Product individual notes are shown in the instruction manual. If there is any difference with common notes individual notes shall
have priority.
・
Before using this product, be sure to read the catalog and instruction manual. There is risk of electric shock or damage to the product
or fire due to improper use.
・
Input voltage, Output current, Output power, ambient temperature and ambient humidity should be kept within specifications,
otherwise the product will be damaged, or cause electric shock or fire.
・
If the built-in fuse is blown, do not use the product even after replacing the fuse, as there is risk of abnormality inside. Be sure to
request repair to our company.
・
For products without built-in protection circuit (element, fuse, etc.), insert fuse at the input to prevent smoke, fire during abnormal
operation. As for products with built-in protection circuit, depending on usage conditions, built-in protection circuit might not work.
It is recommended to provide separate proper protection circuit.
・
For externally mounted fuse do not use other fuses aside from our specified and recommended fuse.
・
This product was made for general purpose electronic equipment use and is not designed for applications requiring high safety (such
as extremely high reliability and safety requirements. Even though high reliability and safety are not required, this product should not
be used directly for applications that have serious risk for life and physical safety. Take sufficient consideration in fail-safe design
(such as providing protective circuit or protective device inside the system, providing redundant circuit to ensure no instability when
single device failure occurs).
・
When used in environments with strong electromagnetic field, there is possibility of product damage due to malfunction.
・
When used in environment with corrosive gas (hydrogen sulfide, sulfur dioxide, etc.) , there is possibility that they might penetrate
th
e product and lead to failure.
・
When used in environments where there is conductive foreign matter or dust, there is possibility of product failure or malfunction.
・
Provide countermeasure for prevention of lightning surge voltage as there is risk of damage due to abnormal voltage.
・
Connect together the frame ground terminal of the product and the ground terminal of the equipment for safety and noise reduction.
If these ground is not connecte
d together, there is risk of electric shock.
・
Parts with lifetime specifications (built-in fan electrolytic capacitor) are required to be replaced periodically. Set the overhaul period
depending on the environment of usage and perform maintenance. Also, note that there are cases when EOL products cannot be
o
verh
auled.
・
Take care not to apply external abnormal voltage to the output. Especially, applying reverse voltage or overvoltage more than the
rated voltage to the output might cause failure, electri
c shock or fire.
・
This product is designed under condition Material group IIIb, Pollution Degree (PD): PD2, Over Voltage category (OVC): OVCII
and Class of equipment: Class I. This product is designed to be accessible only to service technicians as part
of indoor use device.
・
Power supplies with an output voltage of 48Vdc or less must be earthed in the end use equipment to maintain SELV. If the outputs
are not earthed, they must be considered hazardous and must not be made user accessible.
・
Power supplies with an output voltage of 60Vdc are considered to be non-SELV. As a result of this, the output must be guarded or a
deflector fitted during installation to avoid a SERVICE ENGINEER making inadvertent contact with the output terminals, or
dropping a to
ol onto them. The output of this product must not be connec
ted to a
SELV circuit.
・
The output voltage of this power supply unit is considered to be a hazardous energy level (The voltage is 2V or more and the electric
power is 240VA or more), prevention from direct contact with voltage output is highly necessary. While installing or servicing this
power supply unit, avoid dropping tools by mistake or direct contact with voltage output. This might cause an electrical shock. While
repairing this power supply unit, the AC input power must be switch off and the I/O terminal voltage should be less than the safety
level.
・
This product have a built-in fan for air-cooling. Do not block the air intake and exhaust as this might lead to fire.

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TDK-Lambda
HWS1800T Series
INSTRUCTION MANUAL
Note
・
Take note that traces of sheet metal processing be left in our power supplies.
・
When disposing product, follow disposal laws of each municipality.
・
Published EMI (CE, RE) or immunity is the result when measured in our standard measurement conditions and might not satisfy
specification when mounted and wired inside end-user equipment. Use the product after sufficiently evaluating at actual end-user
equipment.
・
When exporting our products, apply for necessary permissions as required by rules and regulations of Foreign Exchange and Foreign
Trade Control Act.
・
Catalogue, contents of the instruction manual may be changed without a prior notice. Refer to latest catalogue or instruction
manual.
・
Reproduction or reprinting the instruction manual or its portion is forbidden without our permission.
LONG-TERM STORAGE METHOD AND LONG-TERM STORAGE PERIOD
・
Please keep the product in carton box.
・
Please do not apply excessive vibration, shock or mechanical stress applied directly to the product.
・
Please keep away from direct sunlight.
・
For long-term storage temperature and humidity, the following conditions shall be used as a guideline :
Temperature range : 5oC～30oC
Humidity range : 40%～60%RH
Please keep away from the places where temperature and humidity can change drastically.
It can cause condensation on the product or deterioration.
・
For long-term storage period, we recommend to use within 2 years after receiving the product.
There is tendency that the leakage current of an aluminum electrolytic capacitor may increase when stored without using for a
long time.
This phenomenon can be improved by applying voltage to the aluminum electrolytic capacitor to reduce the increased leakage
current thro
ugh the self
-
re
covery effect of the electrolyte.
For reference, before using products that have been stored for a very long time, please warm-up first for 30 minutes or more
without taking load.
< Criterion of warm up voltage condition >
(1)Implementation period : 1 year or above after the delivery
(2)Electrical continuity condition
Input voltage : Rating
Load : 0A
Ambient temperature : Normal temperature
Time : 30 minutes or more

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TDK-Lambda
HWS1800T Series
INSTRUCTION MANUAL
1. Model name identification method
HWS1800T-24 ／□
Option (*1)
Rated Output Voltage
Output Power type
Series name
2. Terminal Explanation
Please pay extra attention to the wiring. Incorrect connection will damage the power supply.
· When connecting input and output wiring, input AC-Line should be off.
· Input wiring and output wiring shall be separated, otherwise noise susceptibility of power supply unit will be
weak.
· The protective earth (PE) must be connected to the instrument chassis and the chassis of this power supply unit.
· Remote sensing lines shall be twisted or use the shielded wire.
· Remote ON/OFF control lines shall be twisted or use the shielded wire.
2-1. Front Panel Explanation
HWS1800T Front Panel
① ＋ : ＋ Output terminal
② － : － Output terminal
③ ON : Output (Power On) indication green LED
(The indicator turns on when the power supply output is in
norma
l
operating c
ondition.)
④ V.ADJ :Output voltage adjust trimmer (The output voltage rises when trimmer is turned clockwise.)
⑤ CN01: Remote sensing, ON/OFF control signal, Current balance signal,
⑥ CN02: Output voltage external control signal and Power fail signal output connector.
⑦ FG : Function Ground terminal (Frame ground)
⑧ L1,L2,L3 : Three phase AC input terminal (Fuse in each line)
1
8
2
5
6
3
4
7
NAME PLATE
FG L3 L2 L1
(*1)
/ “No assigned”: Standard type
/HD: High resistance against dust
environment type.
(Refer to the specifications for details.)

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TDK-Lambda
HWS1800T Series
INSTRUCTION MANUAL
2-2. CN01, CN02 Connector pin configuration and Function
CN01, CN02 pin configuration and function are the same.
They are connected to each other in this power supply unit.
When the pin of CN01 side is shorted the same function pins of CN02 side are shorted.
Please note that the function cannot be separately set with CN01 and CN02.
Pin No.
Configuration Function
1 ＋V Connected to ＋Output terminal in this Power supply unit.
(+V terminal can not supply load current.)
2 ＋S
Remote sensing terminal for + output
(For remote sensing function, which compensates for line drop between power supply terminals and load
termin
als.
Connect to +V terminal when remote sensing
function
is unnecessary
)
3 －V Connected to －Output terminal in this Power supply unit.
(
-
V
terminal
can not supply load current)
4 －S
Remote sensing terminal for - output
(For remote sensing function, which compensates for line drop between power supply terminals and load
terminals.
Connect to
-
V terminal when remote sensing
function
is unnecessary
)
5 PC Current balance terminal
(For
output
current balancing in parallel operation.)
6 COM Ground for PC and PV signal.
7 PV
Output voltage external control terminal
(For power supply output voltage control with an external voltage. Connect it with the terminal REF when
PV
function
is unnecessary.
)
8 REF Reference Voltage terminal for Output voltage control
(REF and PV are connected when shipping.）
9 CNT Remote ON/OFF control terminal
(
When the CNT is
pulled to TTL low, the power supply turns on
.
)
10 TOG Ground for CNT and PF signal.
11 PF
Power fail signal output terminal.
(As the output voltage drops, FAN stops and AC input voltage down, open collector output, “Power Fail”
signal
will output
“High”.)
12 TOG Ground for CNT and PF signal.
CN01、CN02 are connected in this power supply unit as follows.
CN01
１ ３ ５ ７ ９ １１
２ ４ ６ ８ １０ １２
CN02
１ ３ ５ ７ ９ １１
２ ４ ６ ８ １０ １２
Output ON/OFF
Con
trol
circuit
Power fail signal generation circuit
Reference voltage generation circuit
※Output ON/OFF control circuit and the Power fail signal circuit are insulated with other circuits in
the power supply. (Insulating voltage AC100V)
Output current
signal circuit
Output
volt
age detection circuit
CN01
1
3
5
7
9
11
4
2
6
8
10
12
CN02
1
3
5
7
9
11
4
2
6
8
10
12

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TDK-Lambda
HWS1800T Series
INSTRUCTION MANUAL
2-3. Basic Connection (Local sensing)
・3-7V model
①Connect “+S” terminal to “+” terminal of output
and “-S” terminal to “-” terminal of output with
sensing wires.
②Connect “CNT” terminal to “TOG” terminal with wire.
③Connect “PV” terminal to “REF” terminal with wire.
※ Please use attachment connector for each
connection.
※ In the following cases, the output is shut down.
When CNT and TOG is opened.
When PV and REF is opened.
・12-60V model
①Connect “+S” terminal to “+V” terminal and “-S”
terminal to “-V” terminal with sensing wires.
②Connect “CNT” terminal to “TOG” terminal with wire.
③Connect “PV” terminal to “REF” terminal with wire.
※ Please use attachment connector for each
connection.
※ In the following cases, the output is shut down.
When CNT and TOG is opened.
When PV and REF is opened.
Attached connector when shipping Attached connector when shipping
１ ３ ５ ７ ９ １１
２ ４ ６ ８ １０ １２
１ ３ ５ ７ ９ １１
２ ４ ６ ８ １０ １２
“+” of output
Red Black Brown Yellow
Load
M8 Bolts and nuts for connecting
to the load line.
(These are not attached to the
product.)
Connector : (JST) S12B-PHDSS
Attached connector when shipping
・Housing : (JST) PHDR-12VS
・Contact : (JST) SPHD-001T-P0.5
2－”+” of output, 4－”-” of output are connected.
7－8, 9－10 are shorted
+
-
Load
M8 Bolts and nuts for connecting
to the load line.
(These are not attached to the
product.)
Connector : (JST) S12B-PHDSS
Attached connector when shipping
・Housing : (JST) PHDR-12VS
・Contact : (JST) SPHD-001T-P0.5
1－2, 3－4, 7－8, 9－10 are shorted.
+
-
NAME PLATE
FG L3 L2 L1
“－” of output
Red Black Brown Yellow
Twist wire
NAME PLATE
FG L3 L2 L1

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TDK-Lambda
HWS1800T Series
INSTRUCTION MANUAL
2-4. Remote sensing required 2-5. Remote ON/OFF control required
①Connect “+S” terminal to “+” terminal of load with
sensing wire
②Connect “-S” terminal to “-” terminal of load with
sensing wires.
③Connect “CNT” terminal to “TOG” terminal with wire.
④Connect “PV” terminal to “REF” terminal with wire.
※ The accuracy of the output voltage will deteriorate
when the sensing terminals are opened.
※ In the following cases, the output is shut down.
When CNT and TOG is opened.
When PV and REF is opened.
①Remove standard attached connector, and use the harness
made by the customer and connect external signal to
between CNT and TOG terminal.
②“TOG” terminal is ground for “CNT” terminal.
In case this function is not used, please short between CNT
and TOG terminal.
Connecting circuit with CN01 or CN02 connector
Connecting circuit with CN01 or CN02 connector
１ ３ ５ ７ ９ １１
２ ４ ６ ８ １０ １２
１ ３ ５ ７ ９ １１
２ ４ ６ ８ １０ １２
１ ３ ５ ７ ９ １１
２ ４ ６ ８ １０ １２
“－” of load
“+” of load
M8 Bolts and nuts for connecting
to the load line
(These are not attached to the
product.)
Load
Connector : (JST) S12B-PHDSS
Remove standard attached connector, and use the harness made by the
customer.
・Housing : (JST) PHDR-12VS
・Contact : (JST) SPHD-001T-P0.5
(3-7V model) 2－”+”of output, 4－”-”of output : should be connected
(12-60V model) 1－2, 3－4 : should be shorted
7－8 : should be shorted
9：CNT
Should be connected to ON/OFF control signal.
10 : TOG
Should be connected to Signal Ground.
* Please use wire for contact and crimping tool specified by maker.
-
+
NAME PLATE
FG L3 L2 L1
Load
M8 Bolts and nuts for connecting
to the load line.
(These are not attached to the
product.)
Connector : (JST) S12B-PHDSS
Remove standard attached connector, and use the harness made by the
customer.
・Housing : (JST) PHDR-12VS
・Contact : (JST) SPHD-001T-P0.5
2－”+” of load, 4－”-” of load should be connected.
7－8, 9－10：should be shorted
* Please use wire for contact and crimping tool specified by maker.
+
-
NAME PLATE
FG L3 L2 L1
(3-7V model)
ON
“－” of output
“+” of output
ON
(12-60V model)

-8-
TDK-Lambda
HWS1800T Series
INSTRUCTION MANUAL
2-6. PF signal output required
①PF signal is an open collector output, therefore
PF signal outputs are shown in circuit below.
②“TOG” terminal is ground for “PF” terminal.
Connecting circuit with CN01 or CN02 connector
(3-7V model) (12-60V model)
１ ３ ５ ７ ９ １１
２ ４ ６ ８ １０ １２
１ ３ ５ ７ ９ １１
２ ４ ６ ８ １０ １２
Load
M8 Bolts and nuts for connecting
to the load line
(These are not attached to the
product.）
Connector : (JST) S12B-PHDSS
Remove standard attached connector, and use the harness made by the
customer.
・Housing : (JST) PHDR-12VS
・Contact : (JST) SPHD-001T-P0.5
(3-7V model) 2－”+”of output, 4－”-”of output : should be connected
(12-60V model) 1－2, 3－4 : should be shorted
7－8, 9－10 : should be shorted.
11 : PF
Should be connected to PF signal output
12 : TOG
Should be connected to Signal Ground.
* Please use wire for contact and crimping tool specified by maker.
-
+
NAME PLATE
FG L3 L2 L1
PF signal output
To signal g
roun
d
PF signal output
To signal ground
“－” of output
“+” of output

-9-
TDK-Lambda
HWS1800T Series
INSTRUCTION MANUAL
3. Block Diagram
Rectifier
PFHC Circuit
Inrush Current Limit Circuit
Filter
Switching Circuit
L1
Control Circuit
OCP
Circuit
OTP
Circuit
OVP
Sensing
Photo-
coupler
Rectifier & Filter
FG
-
Output
CNT
TOG
Remote
ON/OFF
Control
+S
-S
+
COM
PV
Output
Sensing PC
PF
Standby
supply
Latch circuit
OVP
Circuit
UVP
Circuit
Low
output
Voltage
Detection
Photo-
coupler
Delay
Circuit
Output
Sensing
Photo-
coupler
Reference
voltage
Photo-
coupler
Fan
Photo-
coupler
REF
SELV Circuit (60V : Hazardous Voltage circuit)
Open Phase
Detection Circuit
Control Circuit
L3
Input
170～265VAC
L2
Line Filter
●Circuit topology, switching frequency
Half Bridge converter (3-5V : 45kHz, 6-7V : 55kHz, 12-60V : 70kHz)
PFHC circuit : active filter 65kHz
●Fuse rating : 20A
●FG : Function Ground

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TDK-Lambda
HWS1800T Series
INSTRUCTION MANUAL
4. Sequence time chart
Power fail
PF signal
(Open collector）
0V
Vout
0V
INPUT ON
INPUT OFF
INPUT ON
INPUT OFF
Input Voltage
Output Voltage
PF Signal Point
(80% or les s)
Remote
ON/OFF
Control (*1)
H
L
REMOTE OFF
REMOTE ON
OVP ACTION
OCP RELEASED
H
REMOTE OFF
REMOTE ON
OCP ACTION
FAN STOP
L
OTP ACTION
INPUT ON
OVP ACTION
(*3)
OVP Poi nt
(*2)
OCP Point
(105% or more)
(*3)
OCP
(Shut down)
5sec.
(TYP)
5sec.
(TYP)
5sec.
(TYP)
5sec.
(TYP)
INPUT OFF
INPUT ON
OCP ACTION SHUT DOWN
INPUT OFF
INPUT ON
FAN ALM ACTION
INPUT OFF
INPUT ON
OCP ACTION SHUT DOWN
REMOTE OFF
REMOTE ON
FAN STOP
FAN ALM ACTION
REMOTE OFF
REMOTE ON
OTP ACTION
REMOTE OFF
REMOTE ON
INPUT OFF
INPUT ON
OPEN PHASE DETECTION
SHUT DOWN
Open Phase
OVP Point
(*2)
OCP Point
(105% or more)
OCP
(Shut down)
(*1) Level
2.4V≦H≦12V or Open
0V≦L≦0.8V or Short
(*2) OVP Point
3-7V : 125%～140%
12V,15V,24V : 125%～145%
36V : 125%～138%
48V,60V : 115%～125%
(*3) OCP Point
・Peak current : 120%(6V - 15V), 140%(24V - 60V)
Peak current is less than 10 seconds, and duty 35% max.
・Overload exceeding 105%(without output dropping situation) continuously for more than 10 seconds will result to output shutdown.
Meanwhile, overload exceeding 105%(with output dropping) continuously for more than 5 seconds will result to output shutdown.
・OCP Point : More than 120%(6V - 15V), More than 140%(24V - 60V)

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TDK-Lambda
HWS1800T Series
INSTRUCTION MANUAL
5. Functions and Precautions
5-1. Input Voltage Range
Input voltage range is three phase 170 － 265VAC (47 － 63Hz). Input voltage, which is out of specification, may
cause unit damage. Rated input voltage range fix during safety standard application is from 200V to 240VAC (50/60Hz).
5-2. Output Voltage Range
Output voltage is set to the rated value at shipping. V.ADJ trimmer on the front panel side is use to adjust the output
voltage within the range specified. Output voltage trimming range is within -20% － +20% of the rated output voltage
(48V, 60V model: -20% － +10%). Turn the trimmer clockwise to increase output voltage. Take note when the output
voltage is increased excessively over voltage protection (OVP) function may trigger and output voltage will shut down.
Use the output power of the power supply below the rated output power value when you raise the output voltage.
5-3. Over Voltage Protection (OVP)
The OVP function (Inverter shut down method, manual reset type) is provided. OVP function operates within
125-145% of the rated DC output voltage value (3-7V model: 125-140%, 36V model: 125-138%, 48V, 60V model:
115-125%), and the output will be shut down when OVP function triggers. When OVP function operates, the input power
is cut off for a few minutes, and then power is re-input or remote ON/OFF control signal shall be input for recovery of
the output. OVP value is fixed and can not be adjusted.
5-4. Over Current Protection (OCP)
The OCP function (Constant current limiting, Time delay shutdown type) is provided. OCP function operates when the
output current exceeds 105% of maximum DC output current specification and the over current or short circuit condition
continues 5-second or more, the output will be shut down. When the OCP is triggered, the input power is cut off for a
few minutes, and then power is re-input or remote ON/OFF control signal should be input for recovery of the output. The
OCP setting is fixed and not to be adjusted externally.
5-5. Over Temperature Protection (OTP)
Over temperature protection function (manual reset type) is provided. When ambient or internal temperature rises
abnormally, OTP will shut down the output. When OTP is triggered, input power is cut off and allow sufficient cooling to
reset the OTP function. Then power is re-input or remote ON/OFF control signal should be input for recovery of the
output.
5-6. Low Output Detection Circuit (PF)
Low output voltage detection circuit is provided. Power Fail signal (PF signal) will output when output voltage
decrease by either the drop or brown out of the input voltage or OCP, OVP and OTP function operation. PF signal will
turn “High” level to indicate the abnormal status of the power supply when the output voltage decrease to 80% of the
output voltage setting value. However, there is a possibility that PF signal may not output during parallel operation. The
PF signal circuit is insulated from the power supply input and output circuit and it is an open collector. TOG terminal is
ground for PF terminal.
When the Built-in Fan Motor of this power supply unit stops, PF signal will turn to “H” and the output power will shut
down. The Built-in Fan Motor is a component with lifetime. We recommend a periodic replacement. Please contact our
sales office. Replacement is at customer’s expenses.
PF
TOG
Vce max：30V
Ic max：20mA

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TDK-Lambda
HWS1800T Series
INSTRUCTION MANUAL
5-7. Remote Sensing (+S, -S terminal)
Remote sensing function is provided to compensate for voltage drop across the wiring from the power supply output
terminals to the load input terminals. Connect “+S” terminal to “+” terminal of the load and “-S” terminal to “-” terminal
of the load with sensing wires. The total line voltage drop (+ side line and - side line) shall be less than 0.3V. In case that
sensing line is too long, it is necessary to put an electrolytic capacitor across the load terminals.
Please take note that the electrolytic capacitor has generation of heat etc. done by the ripple current depending on
connected load. Therefore, the electrolytic capacitor must have a ripple current allowance higher than the output ripple
current. If CN01 (or CN02) is in use, terminal +S, -S for CN02 (or CN01) must be in open condition.
When the function of remote sensing is not in used, connect +S terminal to +V terminal, and –S terminal to –V
terminal by the attachment connector.
If remote sensing terminals are opened, the stability and the accuracy of the output deteriorate. Therefore, terminal +S,
-S must be connected.
5-8. Remote ON/OFF Control
Remote ON/OFF control is provided. Output can be remotely switch ON and OFF by using CNT terminal and TOG
terminal even though input is connected. The output is turned to ON when TOG and CNT terminals are shorted and
output is turned to OFF when these terminals are opened. When the function is not used, connect TOG and CNT
terminals with short piece. The standards for this function are as follows. “TOG” terminal is ground for “CNT” terminal.
The Mode of control
CNT Level for TOG Terminal
Output
Built
-
in Fan Motor
Short or L（0－0.8V） ON Rotate
Open or H（2.4－12V） OFF Stop
(1) TTL compatible. The maximum input voltage to CNT terminal is 12V, and the maximum allowable reverse voltage is
-1V. The sink current of CNT terminal is 3.5mA.
(2) Output ON/OFF control can be enable by a switch, relay or a transistor ON/OFF. When CNT terminal－TOG
terminal is shorted power supply is turn ON, and when CNT terminal－TOG terminal is opened power supply is turn
OFF.
(3) Remote ON/OFF control circuit is isolated from the input and output circuit of power supply.
It is possible to use it regardless of the positive and negative of the power supply output.
Please be aware that if CNT terminal and TOG terminal is short and input voltage is gradually increase, this will
trigger the low output voltage detector protection circuit and will result to output voltage shut down.
When the low output voltage detector protection circuit is triggered, the input power is cut off for a few minutes,
and then power is re-input or remote ON/OFF control signal should be input for recovery of the output.
＋
S
－S
－
＋
＋
+
－
CNT
TOG
Sink current：3.5mA
Relay
Transistor
TTL,
and etc.

-13-
TDK-Lambda
HWS1800T Series
INSTRUCTION MANUAL
5-9. Output Ripple & Noise
Maximum ripple & noise value in specifications is measured according to measurement circuit specified by
JEITA-RC9131A. When Load lines are longer, ripple & noise becomes larger. In this case, electrolytic capacitor, film
capacitor, etc. might be necessary to use across the load terminal. The output ripple & noise cannot be measured
accurately if the probe ground lead of oscilloscope is too long.
5-10. Series Operation
For series operation, either method (A) or (B) is possible.
There might be a step in the rise waveform during series operation.
(Note1) Please connect a diode for by-pass when using method (A) of the series operation.
Please use the diode with rated forward current is equal or more than load current and that the rated
maximum reverse voltage is higher than output voltage for each power supply.
C3
R:50Ω
C1:4700pF
C2:100uF
C3:0.47uF
Bandwidth
100MHz
Co-axial cable
1.5m 50Ω Oscillo-Scope
R
C1
+
S
+
－
－
S
Po
wer Supply Unit
+
Power supply
－
+
Power supply
－
+
Load
－
+
Load
－
+
Power supply
－
+
Power supply
－
+
Load
－
M
ethod
(
A
)
Method
(
B
)
(Note1)
C2
Load
150mm

-14-
TDK-Lambda
HWS1800T Series
INSTRUCTION MANUAL
5-11. Parallel Operation
Current balancing function is provided. Either of operations mode (A) or (B) is possible.
(A)To Increase the Output Current
Current balancing function activates by connecting PC-to-PC terminal and COM-to-COM terminal, and output current
of each power supply is equivalently supplied to load. Wires to PC terminals shall be as short as possible, same length
and twisted.
There is a possibility that output could be unstable caused by external noise. For this case, disconnect COM terminal
and connect -S terminal from parallel power supply to a single point on the load. Please refer connection Method (A)-2.
1. Adjust the output voltage of each power supply to be same value within 1% or 100mV, whichever is smaller.
2. Use same length and type of wires for all load lines.
3. Maximum value of output current in parallel is up to 80% of all paralleled models. The purpose of the current
balancing function is the static power-up. Therefore the output voltage might decrease according to the
condition of dynamic load. There might be a step in the rise waveform during parallel operation.
4. Up to 5 units can be connected in parallel.
(B)To Use as a Backup Power Supply
1. Set power supply output voltage higher by the forward voltage drop of diode.
2. Adjust the output voltage of each power supply to be same value.
3. Use within the specifications for output voltage and output power.
Method (
A)
-
1
PC
+S
+S
- S
- S
PC
Load
Power Supply
COM
COM
Method (
B)
Power Supply
Load
Io
Vf
Vf
Vo
Vo+Vf
Vo+Vf
Output Power(W)=(Vo+Vf)×Io
+S
-
S
+S
-
S
PC
+S
+S
-S
-S
PC
Load
Power Supply
COM
COM
Method (
A)
-
2

-15-
TDK-Lambda
HWS1800T Series
INSTRUCTION MANUAL
5-12. Isolation Test
Isolation resistance between output and FG (chassis) shall be more than 100MW at 500VDC and between output and
CNT･PF shall be more than 10MW at 100VDC. For safety operation, voltage setting of DC isolation tester must be done
before the test. Ensure that it is fully discharged after the test.
5-13. Withstand Voltage
This series is designed to withstand 3.0kVAC between input and output, 2.0kVAC between input and FG (chassis),
500VAC (60V model : 651VAC) between output and FG (chassis), and 100VAC between output and CNT･PF terminal
each for 1 minute. When testing withstand voltage, set current limit of withstand voltage test equipment at 20mA.
(Output-FG (chassis) : 300mA (60V model : 390mA), Output- CNT･PF : 100mA).
The applied voltage must be gradually increased from zero to testing value and then gradually decreased for shut down.
When timer is used, the power supply may be damaged by high impulse voltage at timer switch on and off. Connect
input and output as follows. If output is left open during test, output voltage might appear momentarily.
This product have monolithic ceramic capacitor in secondary circuit to frame ground.
Some of the withstand voltage tester may generate high voltage at the matching with monolithic ceramic capacitor and
may cause the unit damage.
So, please check the waveform of test voltage.
Output － FG (chassis)
500VDC 100MW or more
Output － CNT･PF
100VDC 10MW or more
Isolation
tester
Isolation
tester
Input － FG (chassis) (solid line)
2kVAC 1min. (20mA)
Input － Output (dotted line)
3kVAC 1min. (20mA)
CNT
TOG
PF
PC
＋
S
＋
－
－
S
L1
FG
L2
L3
CNT
TOG
PF
PC
＋
S
＋
－
－
S
L1
FG
L2
L3
～
Withstand
Voltage
Tester
C
N
T
TOG
PF
PC
+S
+
－
－
S
～
L1
FG
L2
L3

-16-
TDK-Lambda
HWS1800T Series
INSTRUCTION MANUAL
5-14. Output Voltage External Control (PV)
(A) Control by External Voltage
Output voltage external control function is provided. Output voltage can be varied by applying an external
voltage (1 － 6V) to “PV” terminal and “COM” terminal. Note if an external voltage is not applied, there will
be no output. Please consider the following characteristics below when operating the unit.
Connection Method
Output Voltage Linearity
Output － FG (chassis)
500VAC 1min. (300mA)
Output － CNT･PF
100VAC 1min. (100mA)
Withstand
Voltage Tester
CNT
TOG
PC
+S
+
－
－S
PF
～
L1
L2
L3
FG
Withstand
Voltage Tester
CNT
TOG
PC
+S
+
－
－S
PF
～
L1
FG
L2
L3
+S
+
-
-S
PV
Power
Supply
Load
1－6V
COM
（60V model : 651VAC 1min (390mA））

-17-
TDK-Lambda
HWS1800T Series
INSTRUCTION MANUAL
Note: Only as for the model of 3V output, the output voltage is used from 30% to 120%
at the PV voltage is from 1.5V to 6.0V
Note: Only as for the model of 5-36V output, the output voltage is used from 20% to 120%
at the PV voltage is from 1V to 6.0 V
Note: Only as for the model of 48V, 60V output, the output voltage is used from 20% to 110%
at the PV voltage is from 1V to 5.5V
Output Voltage Derating
Load Current
0
120%
110%
20%
Nominal
Output
Voltage
Output (V)
83%
90%
100%
Operating
Area
3
0%
Note: Only as for the model of 48V, 60V output, the maximum output voltage is used up to 110% at 90% load current.
(B) Control by External Variable Resistor
“PV” terminal and “COM” terminal usage is the same as explained in section ｢control by external voltage｣. But in
this method voltage for control is supplied through REF terminal. Variable resistor is connected between REF terminal
and COM terminal and the middle point of variable resistor is connected to PV terminal. Please use the output voltage
within 20% - 120% of rated output voltage value (48V, 60V model : 20% - 110%). Wires for control lines must be
twisted wire or shield wire. In addition, maximum variable voltage when control by external variable resistor is rated
output voltage (100%). When output voltage must be externally control to 120% of rated output voltage (110% for 48V,
60V model), please follow the following procedure.
(1) PV terminal and REF terminal is short by using standard connector supplied.
(2) Set the power supply output voltage to maximum value of the output voltage variable range mentioned in
specification standard by adjusting V.ADJ volume at the front panel.
(3) Remove standard connector after input is cut off.
(4) Connect external variable resistor (50kW) between REF terminal and COM terminal. Then connect middle point of
external variable resistor to PV terminal.(sensing current is 1.4mA)
＋
S
＋
－
－
S
REF
Power
supply
Load
Sensin
g current
: 1.
4mA
Variable resistor 50k
W
COM
PV
VR1
Connection method

-18-
TDK-Lambda
HWS1800T Series
INSTRUCTION MANUAL
0%
20%
40%
60%
80%
100%
120%
0 10000 20000 30000 40000 50000
Variable resistor value for REF-PV（VR1）[W]
When output voltage is over rated value, please make sure that maximum output power is below rated value.
Moreover, when output voltage is below rated value, please make sure that maximum output current is below rated
value.
Please consider the following characteristic during usage.
* Adjustable output voltage within 20%(3Vmodel : 30%) of output (less than 1V of PV voltage) is proportional
to PV voltage and has a linear characteristic. However, for output voltage within 10% of output (about less
than 0.5V of PV voltage), output will go into intermittent mode and ripple voltage becomes large, also
irregular sound is release from the power supply. However, it is not damage. There will also be cases of the
power supply shutting down triggered by under voltage lock out protection function. With output shutting
down, low output detection function (PF) triggers the PF signal and set it to "H", and also output LED is
switch off. Under voltage lock out protection mode, switch off input for a few minutes and then switch on
input again for recovery. Recovery from under voltage lock out is also possible by turning remote ON/OFF
control signal OFF and ON. Under voltage detection value uses an automatic tracking mode, which follows
the output voltage and constantly correspond to the 70%-80% of output voltage with a protection function
mode. Base on the explanation above, we will kindly exclude the usage of adjustable output voltage within
20% of the output voltage from the product warranty. For application that requires variable output voltage
within 20% of output voltage, please kindly consider the above contents prior to operation. For application
that requires output voltage below 20%, due to different type of application for the user's system, there might
be a situation (behavior) different from the one mentioned above. Therefore please check with the user
system.
110%
of maximum s
etting value
120%
of maximum
setting value
Rated output :
voltage
Output
voltage

-19-
TDK-Lambda
HWS1800T Series
INSTRUCTION MANUAL
5-15. Output peak Current
For model with output peak current, please meet the following condition.
Reduce peak current value according to output derating as section 6-1.
The output is shut down by protection circuit when rated current and continuous peak output time (τ) exceeds rated
value during usage.
When protection circuit is activated, input is temporarily cut off for a few minutes and then power is re-input or
remote ON/OFF control signal should be input for recovery of the output.
Continuous Peak output time.(τ) ：Within 10 seconds
Peak output current(Ip) ：Within the rated peak output current
Duty：up to 35%
Duty = ×100(%)
Condition 1 Condition 2
Ip2× < Irms max Ip12× + a2 × ( 1－ ) < Irms max
Ip,Ip1 ： Peak output current（A）
Iav ： Rated output current（A）
Im ： Average output current（A）
τ ： Peak current pulse width （sec）
T ： cycle （sec）
5-16. Input Open Phase Detection
If one of the 3-phase input line becomes open or one phase voltage falls below 160 VAC, the output will be shut off in
approximately 3 seconds. To restore the output to normal, shut off the input once, and apply a normal input line voltage
again after for a while.
Model Irms max
HWS1800T-6 177.5A
HWS1800T-7 142.0A
HWS1800T-12 88.7A
HWS1800T-15 71.0A
HWS1800T-24 62.1A
HWS1800T-36 41.4A
HWS1800T-48 31.0A
HWS1800T-60 24.8A
τ
T
τ
T
τ
T
τ
T
0A
Ip1
τ
T
a
A
0A
Ip
τ
T

-20-
TDK-Lambda
HWS1800T Series
INSTRUCTION MANUAL
6.Mounting Directions
6-1. Output Derating
Mounting directions are as follows.
Standard mounting method is (A). Methods (B), (C) and (D) are also possible.
Mounting methods besides (A),(B),(C) and (D) (example : (E) and (F)) are inhibit.
LOAD(W)
Ta(°C) A B C D
-10 － +40
990 990 990 990
50 825 825 825 825
60 660 660 660 660
71 495 495 495 495
LOAD(W)
Ta(°C) A B C D
-10 － +40
1500 1500 1500 1500
50 1250 1250 1250 1250
60 1000 1000 1000 1000
71 750 750 750 750
LOAD(W)
Ta(°C) A B C D
-10 － +40
1500 1500 1500 1500
50 1500 1500 1500 1500
60 1125 1125 1125 1125
71 750 750 750 750
LOAD(W)
Ta(°C) A B C D
-10 － +40
1800 1800 1800 1800
50 1680 1680 1680 1680
60 1300 1300 1300 1300
71 900 900 900 900
HWS1800T
3V Output
Derating
(
Include option model /HD
)
Ambient Temperature (℃)
HWS1800T
5V Output Derating
(
Include option model /HD
)
HWS1800T
6V
-
15V Output Derating
(
Include option model /HD
)
HWS1800T
24V
-
6
0V Output Derating
(
Include option model /HD
)
1000
40 71
1600
1
40
0
71
Mounting A, B, C, D
1
60
0
1
40
0
1
20
0
1
00
0
80
0
60
0
40
0
20
0
1
80
0
200
0
-10
-10 20 71
-10 71
0 50 60
200 50 60
Ambient Temperature (℃)
Ambient Temperature (℃)
Ambient Temperature (℃)
Mounting A, B, C, DMounting A, B, C, D
Mounting A, B, C, D
Mounting A, B, C, D
40
40
0
200 50 60
800
60
0
200
400
1200
1
00
0
8
0
0
60
0
200
40
0
0
0 40
-10 200 50 60
1600
1
40
0
1200
1
00
0
8
0
0
60
0
200
400
0
Mounting A, B, C, D
(A)
(B)
(C) (D)
Inhibit
Inhibit
(E) (F)
Standar
d
Mounting
Load
(W)
Load
(W)
Load
(W)
Load
(W)