12

・All specifications are subject to change without notice.

Input Voltage Range

Input voltage range is single phase 85

- 265VAC (47 - 63Hz) or

120 - 350VDC. Input voltage, which is out of specification, may

cause unit damage. Rated input voltage for safety standard

application is 100AC-240VAC (50/60Hz).

Output Voltage Range

Output voltage is set to the rated value at shipment. V.ADJ trim-

mer on the front panel side can be used to adjust the output

voltage within the range specified (refer to specifications for

adjustable range).

To turn the trimmer clockwise, the output voltage will be in-

creased. Take note when the output voltage is increased ex-

cessively, over voltage protection (OVP) function may trigger

and output voltage will be shut down.

Over Voltage Protection (OVP)

The OVP function (inverter shutdown method, manual re-

set type) is provided. OVP function operates within

specified

range (refer to specification) of the rated output voltage value

and the output will be shut down when OVP function triggers

(refer to specifications for OVP range of each models). To reset

OVP, remove the input of power supply for a few minutes, and

then re-input. Or, use CNT to reset (remote ON/OFF : OFF to

ON). OVP value is fixed and not to be adjusted externally. Never

apply more than rated output voltage to output terminal, which

may lead to damage. In the case of inductive load, use decou-

pling diode at output line.

Over Current Protection (OCP)

The OCP function is provided. OCP characteristic is constant

current limiting, automatic recovery. OCP function operates

when the output current exceeds 105% (24V output model:

101% of peak current) of maximum DC output current speci-

fication. The output will be automatically recovered when the

overload condition is cancelled. Never operate the unit under

over current or shorted conditions for more than 30 seconds,

which may lead to damage. OCP setting is fixed and not to be

adjusted externally.

Over Temperature Protection (OTP)

The OTP function (manual reset type) is provided. When ambi-

ent or internal temperature rises abnormally, OTP function op-

erates and output will be shut down. After shut down, remove

the input and cool it down to reset OTP. Then re-input.

Power Failure Detection Circuit (ALM)

Power failure detection circuit is provided. ALM (Alarm) signal

will turn“High”level to indicate the abnormal status when con-

verter stops. Please take note in parallel or N+1 operation at light

load condition, maybe only one of the power supply operates

and other power supply stops. When the built-in FAN motor of

this power supply unit stops, ALM signal will turn to “High” too.

If the output voltage is decreased to less than 20% of rated

voltage, or decreased rapidly through an external adjustment

mechanism when load is light, the ALM signal may turn “High”.

The ALM signal is isolated from input and output by a photo-

mosfet. It uses the open collector method shown as below.

Remote Sensing (+S, -S terminal)

This function compensates voltage drop of wiring from output

terminals to load terminals. Connect “+S” terminal to “+” termi-

nal of load and “-S” terminal to “-” terminal of load with sensing

wires. The total line voltage drop (+ side line and - side line) shall

be less than 0.3V. In case that sensing lines are too long, it is

necessary to put an electrolytic capacitor in following places.

(1) across the load terminal,

(2) between “+S” terminal and “+V” terminal,

(3) between “-S” terminal and “-V” terminal.

When the function of remote sensing is not used, connect +S

terminal to +Vm terminal, and -S terminal to -Vm terminal by the

attachment connector.

If remote sensing terminals are opened, the stability and the

accuracy of the output deteriorated. Therefore, terminal +S, -S

must be connected.

Remote ON/OFF Control

Remote ON/OFF control is provided.

Using this function, output on/off is allowed to control without

input voltage on/off.

(1) The maximum input voltage to CNT2 terminal is 12V, and the

maximum allowable reverse voltage is -1V; Current flow into

CNT2 is 5mA typical and 12mA maximum.

(2) A switch and relay or a transistor can be used as ON/OFF switch.

(3) Remote ON/OFF control circuit is isolated from the input

and output by a photo-coupler and can be controlled re-

gardless of the output potential (+ or -). Connect TOG termi-

nal to ground of control signal.

Specifications of remote ON/OFF

CNT2-TOG current or voltage condition:

Connection method

(a)

(b)

(c)

SW Logic

Output on

SW open

(0.1mA max)

SW open

(0.1mA max)

SW close

(0.5V max)

Output off

SW close

(3mA min)

SW close

(3mA min)

SW open

(0.1mA max)

Pin

CNT2, TOG

CNT1, CNT2, TOG, G2 CNT1, CNT2, TOG, G2

Imax=10mA

ALM

Ｇ1

Vmax=50V

+

CN1

+Vm

+S

-S

-Vm

-V

+V

Load

+

-

+

4. Functions and Precautions