TDK-Lambda GWS-250-24, GWS-250-12, GWS250 User guide
GWS250 Series
TDK-Lambda
GWS 2
INSTRUCTION MANUAL
50
Series
Instruction Manual
BEFORE USING THE POWER SUPPLY UNIT
Pay attention to all warnings and cautions before using the unit. Incorrect usage could lead to an electrical
shock, damage to the unit or a fire hazard.
WARNING and CAUTION
Do not modify.
Do not touch the internal components, they may have high voltage or high temperature. You may get
electrical shock or burned.
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.
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.
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. There is no possibility of fire or burning.
Confirm connections to input/output terminals are correct as indicated in the instruction manual.
This power supply has a possibility for hazardous voltage to appear at output terminal 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 GWS series products, indicates compliance with the Low Voltage Directive
(2006/95/EC) in that it complies with EN60950-1 2nd Edition.
DWG NO. : PA589-04-01B
APPD CHK DWG
1. Model name identification method
GWS
GWS 250
GWSGWS
2. Terminal Explanation
2-1. Front Panel Explanation
250 –––– 12
250250
(1) L : Input terminal Live line (Fuse in line)
(2) N : Input terminal Neutral line
(3) FG : Frame Ground
(4) - V : - Output terminal
(5) +V : + Output terminal
(6) Output monitoring indicator (Green LED : ON)
(7) V.ADJ : Output voltage adjustable trimmer
(The output voltage rises when the trimmer is turned clockwise.)
(8) CN1: DC_OK, 5VSB, Remote On/Off and PV signals (Refer to 2.2)
12 ////
1212
Option (*1)
Rated Output Voltage
Output Power type
Series name
(*1)
blank: Standard type
/P: Power up to 350W with system airflow of
20cfm minimum and air blowing in from
opposite side of input/output connectors
/BAT: Battery charging for 24V (21~29V/8.8A)
& 48V (42~58V/4.4A) only
/T: OTP autorecovery after unit cools down
/RL: Remote ON/OFF reverse logic (Active High)
TDK-Lambda
GWS 2
INSTRUCTION MANUAL
50
Series
1
drops,
2-2. CN1 Connector Pin Configuration and Function
Pin
Configuration Function
No.
1 DC_OK DC_OK signal is an open collector output signal,
referenced to pin2 (COM). As the output voltage
DC_OK signal will output “High”.
2 COM Return loop for DC_OK signal.
3 5VSB Auxiliary voltage output, 4.75~5.25V, referenced to
pin4 (COM). The maximum load current is 0.3A. This
output is not controlled by the remote ON/OFF control.
4 COM Return loop for 5VSB signal.
5 CNT+ Remote ON/OFF control terminal
(When CNT+ is pulled to TTL low, power supply unit
turns ON. Otherwise, it turns OFF)
6 CNT- Return loop for CNT+ signal
7 PV Output voltage external control terminal
8 COM Return loop for PV signal.
CN1 Connector, Housing and Terminal Pins
TDK-Lambda
GWS 2
INSTRUCTION MANUAL
50
Series
PART DESCRIPTION PART NAME MANUFACTURER
PIN HEADER S8B-PHDSS(LF)(SN) JST
SOCKET HOUSING PHDR-8VS JST
SPHD-001T-P0.5 OR
TERMINAL PINS
HAND CRIMPING TOOL
SPHD-002T-P0.5 JST
YRS-620 (SPHD-002T-P0.5) OR
YC-610R (SPHD-001T-P0.5)
Hand Crimp Tool for Milli-Grid and
MicroBlade Crimp Terminals
JST
2
3. Terminal Connection Method
Please pay extra attention to the wiring. Incorrect connection may cause damage the power supply.
When connecting input and output wiring, and CN1, input AC-Line should be OFF.
The output load line and input line shall be separated and twisted to improve noise immunity.
Connect FG terminal to ground terminal of the equipment.
Remote ON/OFF control lines shall be twisted or use shielded wire.
Output current for each terminal screw shall be less than 30A.
GWS250
Basic Connection
Connect “CNT+” terminal to “CNT-“ terminal
with the attached connector.
DC_OK output signal required
Open collector method shown below shall be used
“COM“ terminal is ground for “DC_OK” terminal.
TDK-Lambda
GWS 2
INSTRUCTION MANUAL
50
Series
ON/OFF control required
“CNT-“ terminal is ground for “CNT+” terminal.
PV control required
Inject external voltage between 3~6V
“COM“ terminal is ground for “PV” terminal.
3
4. Explanation of Functions and Precautions
4-1. Input Voltage Range
Input voltage range is single phase 85 ~ 264VAC (47 ~ 63Hz) or 125 ~ 373VDC.
Input voltage which is out of specification, may damage the unit. For cases where conformance to various
safety specs(UL,CSA,EN) are required, input voltage range will be 100~240VAC (50/60Hz ).
Note : GWS250 series is able to withstand Input Surge of 300VAC for 5 seconds.
4-2. 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 (12V & 48V) or below the peak output current (24V & 36V) when output voltage is raised.
TDK-Lambda
GWS 2
INSTRUCTION MANUAL
50
Series
4-3. Over Voltage Protection (OVP)
The OVP function will shutdown the output. To reset OVP, remove the input of power supply for a few minutes, and
then re-input. Alternatively, use CNT reset (Remote ON/OFF: OFF to ON). OVP setting is fixed and cannot be adjusted
externally.
4-4. Over Current Protection (OCP)
OCP function operates when the output current exceeds OCP specifications. OCP characteristic is constant current
limiting for 24V ~ 48V while 12V has hiccup mode. 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 possibility of fire or burning. OCP setting is fixed and not to be adjusted externally.
4-5. 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 output. To recover the unit, first shut down the AC input and let the unit
cool down before turning ON the AC input. Alternatively, use CNT reset (Remote ON/OFF: OFF to ON) after letting the
unit cool down.
As for the /T option model, the unit automatically recovers after it cools down without the need for AC recycle or CNT
reset.
4
4-6. Low Output Detection Circuit (DC_OK)
Low output voltage detection circuit is provided. DC okay (DC_OK) signal will turn “High” level to indicate abnormal
status when the output voltage becomes less than approximately 80% of rated value caused by either the drop or
brownout of the input voltage or OCP, OVP and OTP function generation. It uses the open collector method as shown
below
TDK-Lambda
GWS 2
INSTRUCTION MANUAL
50
Series
4-7. Remote ON/OFF Control
Remote ON/OFF control is provided.
Using this function, output on/off is allowed to be controlled without input voltage on/off. The output is turned ON when
CNT+ and CNT- terminals are shorted, while the output is turned OFF when these terminals are opened. When this
function is not used, connect CNT+ and CNT- terminals together. The standards for this function are as follows
(1) TTL compatible.
(2) The maximum input voltage to CNT+ terminal is 12V, and the maximum allowable reverse voltage is -1V.
(3) The sink current for CNT+ terminal is 3.5mA.
(4) A switch or a relay or a transistor or a FET can be used as ON/OFF switch.
The /RL option model reverses the logic of the remote ON/OFF function.
Voltage Range between CNT+ and CNT-
2.4 ≤ H ≤ 12.0V or Open OFF ON
0.0 ≤ L ≤ 0.8V or Short ON OFF
Relay, Transistor,
FET, Switch
Standard type /RL option
Output Status
5
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