
97
・All specifications are subject to change without notice.
Instruction Manual
HWS
HWS HD
HWS ME
HWS-P
Input Voltage Range
Input voltage range is single phase 85−265VAC (47−
63Hz). Input voltage, which is out of specification, may
cause unit damage. Rated input voltage range fix dur-
ing safety standard application is from100V to 240VAC
(50/60Hz).
While applying input voltage from 85VAC to 90VAC, out-
put load current derating is required.
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 trim-
ming range is within -20%−+20% of the rated output volt-
age (48V, 60V model: -20 % −+10 % ). Turn the trimmer
clockwise to increase output voltage. Take note when the
output voltage is increased excessively over voltage pro-
tection (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 mod-
el: 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 ad-
justed 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 allow 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 de-
crease 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 op-
eration. 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 offi ce. Replacement is at customer s ex-
penses.
PF
TOG
Vce max:30V
Ic max:20mA
Remote Sensing (+S, -S terminal)
Remote sensing function is provided to compensate for
voltage drop across the wiring from the power supply out-
put 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 volt-
age 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 gener-
ation 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, teS, -S
for CN02 (or CN01) must be in open condition.
+
+
−
−
+S
−S
When the function of remote sensing is not in used, con-
nect +S terminal to +V terminal, and -S terminal to -V ter-
minal 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.
Remote ON/OFF Control
Remote ON/OFF control is provided. Output can be re-
motely switch ON and OFF by using CNT terminal and
TOG terminal even though input is connected. The out-
put 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.
Sink current:3.5mA
Relay
Transistor
TTL,
and etc.
CNT
TOG
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
2. Functions and Precautions
HWS
1000
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09.10.26 10:29:24 AM
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