TDK-Lambada HWS?HWS, User Manual, Page: 117 / 133

117
・All specifications are subject to change without notice.
Instruction Manual
HWS
HWS HD
HWS ME
HWS-P
HWS
1800T
Input Voltage Range
Input voltage range is three phase 170−265VAC(47−63Hz). Input
voltage, which is out of specifi cation, may cause unit damage. Rated
input voltage range fi x during safety standard application is from 200V
to 240VAC (50/60Hz).
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
specifi ed. 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.
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 fi xed and can not be adjusted.
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 specifi cation 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 fi xed and not to be adjusted externally.
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 al-
low suffi cient 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.
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 opera-
tion. 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 replace-
ment. Please contact our sales offi ce. Replacement is at customer s
expenses.
Vce max：30V
Ic max：20mA
PF
TOG
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. There-
fore, the electrolytic capacitor must have a ripple current allowance
higher then the output ripple current. If CN01 (or CN02) is in use, ter-
minal +S, -S for CN02 (or CN01) must be in open condition.
＋S
ー
S
＋
ー
＋
ー
When the function of remote sensing is not in used, cS termi-
nal 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, teS, -S must be connect-
ed.
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 termi-
nals 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.
2. Functions and Precautions
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