TDK-Lambda GWS250 Series Manuale utente

TDK-Lambda

GWS 250 Series

INSTRUCTION MANUAL

GWS250 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

zDo not modify.

zDo not touch the internal components, they may have high voltage or high temperature. You may get

electrical shock or burned.

zWhen 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.

zThis 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.

zNever 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.

zConfirm connections to input/output terminals are correct as indicated in the instruction manual.

zThis 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

TDK-Lambda

GWS 250 Series

INSTRUCTION MANUAL

1. Model name identification method

GWS 250 – 12 /

2. Terminal Explanation

2-1. Front Panel Explanation

(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)

(*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)

Option (*1)

Rated Output Voltage

Output Power type

Series name

TDK-Lambda

GWS 250 Series

INSTRUCTION MANUAL

2-2. CN1 Connector Pin Configuration and Function

No.

Configuration Function

1 DC_OK DC_OK signal is an open collector output signal, ref-

erenced to pin2 (COM). As the output voltage drops,

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

PART DESCRIPTION PART NAME MANUFACTURER

PIN HEADER S8B-PHDSS(LF)(SN) JST

SOCKET HOUSING PHDR-8VS JST

TERMINAL PINS SPHD-001T-P0.5 OR

SPHD-002T-P0.5 JST

HAND CRIMPING TOOL

YRS-620 (SPHD-002T-P0.5) OR

YC-610R (SPHD-001T-P0.5)

Hand Crimp Tool for Milli-Grid

and

MicroBlade Crimp Terminals

JST

TDK-Lambda

GWS 250 Series

INSTRUCTION MANUAL

3. Terminal Connection Method

Please pay extra attention to the wiring. Incorrect connection may cause damage the power supply.

zWhen connecting input and output wiring, and CN1, input AC-Line should be OFF.

zThe output load line and input line shall be separated and twisted to improve noise immunity.

zConnect FG terminal to ground terminal of the equipment.

zRemote ON/OFF control lines shall be twisted or use shielded wire.

zOutput current for each terminal screw shall be less than 30A.

GWS250

zBasic Connection

Connect “CNT+” terminal to “CNT-“ terminal

with the attached connector.

zON/OFF control required

“CNT-“ terminal is ground for “CNT+” terminal.

zDC_OK output signal required

Open collector method shown below shall be used

“COM“ terminal is ground for “DC_OK” terminal.

zPV control required

Inject external voltage between 3~6V

“COM“ terminal is ground for “PV” terminal.

TDK-Lambda

GWS 250 Series

INSTRUCTION MANUAL

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.

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.

TDK-Lambda

GWS 250 Series

INSTRUCTION MANUAL

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

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.

Output Status

Voltage Range between CNT+ and CNT- Standard type /RL option

2.4 ≤H ≤12.0V or Open OFF ON

0.0 ≤L ≤0.8V or Short ON OFF

Relay, Transistor,

FET, Switch

TDK-Lambda

GWS 250 Series

INSTRUCTION MANUAL

4-8. Output Ripple & Noise

Ripple & noise are measured at 20MHz by using a 300mm twisted pair of load wires terminated with a 0.1uF film

capacitor & 47uF electrolytic capacitor. When load lines are longer, ripple becomes larger. The output ripple cannot be

measured accurately if the probe ground lead of oscilloscope is too long. At low temperature, large ripple & noise may

also be observed due to large ESR of the internal Electrolytic Capacitors especially at -25°C.

4-9. Series Operation

For series operation, either method ( A ) or ( B ) is possible.

Method(A) Method(B)

Output

Terminal

Output

Terminal

Load

Power

Supply

Power

Supply

Load

Output

Terminal

Output

Terminal

Note : In case of Method ( A ), please connect diodes to prevent the reverse voltage.

4-10. Parallel Operation

(A) Operation to increase the Output Current is not possible.

(B) Operation as a Backup Power Supply is possible as follows.

1. Set the power supply output voltage higher by the amount of forward voltage drop ( VF) of the diode.

2. Please adjust the output voltage of each power supply to be the same.

3. Please use within the specifications for output voltage and output current.

(A) (B)

Load

Output

Terminal

Output

Terminal

Power

Supply

Out put

Terminal

Out put

Terminal

Loa

Power

Supply

TDK-Lambda

GWS 250 Series

INSTRUCTION MANUAL

4-11. Output Voltage External Control (PV)

Output voltage external control function is available. Output voltage can be varied by applying an external voltage

(3–6V) to “PV” terminal and “COM” terminal. Please consider the following characteristics.

Note:

For 12V & 36V output model, limit output voltage variation range at 60% ~ 110%. At PV voltage variation 3V ~ 5.5V.

For 24V output model, limit output voltage variation range at 60% ~ 120%. At PV voltage variation 3V ~ 6V.

For 48V output model, limit output voltage variation range at 80% ~ 120%. At PV voltage variation 4V ~ 6V.

Connection method

PV voltage (Nominal Input Voltage)

Output Voltage Linearity

5.5V

6V5V

Nominal

Vout

60%

110%

120%

Output Voltage

80%

24 & 48V Model

48V Model

12~36V Model

12 & 36V Model

Output Voltage Derating

100%83%

Nominal

Vout

110%

120%

90%

Load Current

Output Voltage

80%

60%

24 & 48V Model

48V Model

12~36V Model

12 & 36V Model

TDK-Lambda

GWS 250 Series

INSTRUCTION MANUAL

4-12. Battery Charging (/BAT) option

An option model for battery charging operation is available. It comes in two output voltages namely; 24V & 48V

with ex-factory setting of 29V & 58V respectively.

However, in conjunction with the Vadj and PV functions, the output voltage can be set to the range shown on the

charts below.

Connection method

TDK-Lambda

GWS 250 Series

INSTRUCTION MANUAL

4-13. Output Peak Power

Operating conditions for peak power/current models:

(a) Reduce peak current according to output derating curve for higher ambient temperature

(see section 5.1)

(b) Output might shut down when the rated current or the continuous peak output time (τ)

exceeded rated value specified. Power supply may shut down and operate in hiccup or

constant current limiting mode.

Input voltage : 115 ~ 230 VAC +/- 20% (50/60 Hz)

Continuous peak out time (τ) : < 10s

Peak output current (Ip) : Within the rated peak output current

Duty: not more than 35%

Duty = ---- x 100 (%)

2x ---- < Irms max

Applicable model for Peak Output Power :

Model Irms max.

GWS250-24 7.40 A

GWS250-36 4.97 A

4-14. Auxiliary Supply

Auxiliary supply (5V, 0.3A max) is provided to ease customer application. Aux voltage is always available as long as

input power in the specified voltage range is present.

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