TDK-Lambda
LS 200 Series
INSTRUCTION MANUAL
LS200 Series
Instruction Manual
BEFORE USING THE POWER SUPPLY UNIT
Pay attention to all warnings and cautions before using the unit. Incorrect usage may lead to an electrical
shock, damage to the unit or a fire hazard.
WARNING and CAUTION
z Do not modify.
z Do not touch the internal components; it may have high voltage or high temperature. You may get electrical
shock or burn.
z When the unit is operating, keep your hands and face away from it as you may be injured by flying debris in
the event of a fault.
z This power supply is designed for use within an end product. Stick the WARNING label for users on the
system equipment and notify in the system instruction manual.
z Never operate the unit under over current or short-circuit conditions for more than 30 seconds or outside its
specified Input Voltage Range, which could result in damage but there is no possibility of fire or burning.
z Confirm connections to input/output terminals are correct as indicated in the instruction manual.
z Hazardous voltage may appear at output terminals depending on the type of failure. The outputs of these
products must be earthed in the end equipment to maintain SELV.
If the outputs are not earthed, they must be considered hazardous and must not be made user accessible.
Note: CE MARKING
CE marking, when applied to the LS series products, indicates compliance with the Low Voltage Directive
(2006/95/EC) in that it complies with EN60950-1
2nd edition.
DWG NO. : PA607-04-01
APPD CHK DWG
TDK-Lambda
LS 200 Series
INSTRUCTION MANUAL
1. Terminal Explanation
Please pay extra attention to the wiring. Incorrect connection may cause damage the power supply.
z When connecting input and output wiring, input AC-Line should be OFF.
z Input wiring and output wiring shall be separated, otherwise noise susceptibility of power supply unit
will be weak.
z The protective earth (PE) must be connected to the instrument chassis and the chassis of this power
supply unit.
z Remote sensing lines shall be twisted or use shielded wire.
z Remote ON/OFF control lines shall be twisted or use shielded wire.
1-1. Front Panel Explanation
(1) L : Input terminal Live line (Fuse in line)
(2) N : Input terminal Neutral line
(3)
(4) - V : - Output terminal
(5) +V : + Output terminal
(6) Output voltage adjustable trimmer
(7) Output monitoring indicator (Green LED : ON)
(8) CN2: Remote sensing and ON/OFF control signal
: Functional Ground
FG
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8
5
3
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TDK-Lambda
LS 200 Series
INSTRUCTION MANUAL
2. Terminal Connecting Method
2-1. Terminal connecting method
z Input must be off when making connection.
z Connect FG terminal to ground terminal of the equipment.
z The output load line and input line shall be separated and twisted to improve noise immunity.
Maximum output current of each output terminal is 20A. If more than 20A, use 2 terminals.
2-2. CN2 Connector pin configuration and Function
Pin
CN2
PCB
Configuration Function
No.
1 +Vm Connected to +Output terminal of the power supply
unit. (+Vm terminal cannot supply load current)
2 +S Remote sensing terminal for +Output
(For remote sensing function, this compensates for line
drop between power supply terminals and load terminals. Connect to +Vm terminal when remote sensing
function is not required)
3 -Vm Connected to -Output terminal of the power supply
unit. (-Vm terminal cannot supply load current)
4 -S Remote sensing terminal for -Output
(For remote sensing function, this compensates for line
drop between power supply terminals and load terminals. Connect to -Vm terminal when remote sensing
function is not required)
5 NC No connection
6 NC No connection
7 CNT+ Remote ON/OFF control terminal
(When CNT+ is pulled to TTL low, power supply unit
turns ON. Otherwise, it turns OFF)
8 CNT- Return loop for CNT+ signal
2
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TDK-Lambda
LS 200 Series
INSTRUCTION MANUAL
2.3. Basic connection (Local sensing)
(1) Connect “+S” terminal to “+Vm” terminal with sensing wire
(2) Connect “-S” terminal to “-Vm” terminal with sensing wire
(3) Connect “CNT+” terminal to “CNT-” terminal with wire
• Please use attached CN2 connector for each connection.
2-4. Remote sensing required
(1) Connect “+S” terminal to “+Vm” terminal of load with sensing wire.
(2) Connect “-S” terminal to “-Vm” terminal of load with sensing wire.
(3) Connect “CNT+” terminal to “CNT-” terminal with wire.
• The accuracy of output voltage will be affected when sensing terminal is opened.
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TDK-Lambda
LS 200 Series
INSTRUCTION MANUAL
3. Explanation of Functions and Precautions
3-1. Input Voltage Range
Input voltage range is single phase 85 ~ 264VAC (47 ~ 63Hz) or 120 ~ 373VDC.
Input voltage which is out of specification, may damage the unit. For cases where conformance to various safety specifications (UL, CSA, EN) are required, input voltage range shall be 100~240VAC
(50/60Hz).
Note: LS200 series is able to withstand Input Surge of 300VAC for 5 seconds.
3-2. Output Voltage Range
V.ADJ trimmer is for output voltage adjustment within the range of specifications. Turning the trimmer
clockwise will increase the output voltage. Kindly note that Over Voltage Protection (OVP) function
may trigger if the output voltage is increased excessively. Please ensure that the output power is below
the rated output power, and output current is below the maximum output current (3.3V ~ 15V and 48V)
or below the peak output current (24V ~ 36V) when output voltage is raised.
3-3. Inrush Current
Power Thermistor is built in to protect the circuit from high Inrush Current. Please select suitable input
switch and fuse rating in case of re-input the power at high temperature.
3-4. Over Voltage Protection (OVP)
The OVP function will shutdown the output. The input shall be removed for a few minutes, and then reinput for recovery of the output. OVP setting is fixed and cannot be adjusted externally.
3-5. Over Current Protection (OCP)
OCP function activates when the output current exceeds the specified OCP limit. The output will automatically recover when the overload condition is removed. Do not operate overload or dead short conditions for more than 30 seconds, which could result in damage. There is no possibi lity of fire or burning.
3-6. Over Temperature Protection (OTP)
Over Temperature Protection function (manual reset type) is available. When ambient or internal temperature rises abnormally, OTP function will shut down the outpu t. To recover the unit, first shut down
the AC input and let the unit cool down before turning ON the AC input.
3-7. 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 “+Vm” terminal of the
load and “-S” terminal to the “-Vm” terminal of the load with sensing wires. The total line voltage
drop (+Vm side line and –Vm side line) shall be less than 0.3V. In the case that sensing wires are too
long, it is necessary to put an electrolytic capacitor across the load terminals. Example of external capacitor is listed in the table below :
Minimum external capacitance at the load input terminal
MODEL 3.3V 5V 7.5V 12V 15V 24V 36V 48V
LS200 2,200uF 1,000u 470uF
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