Cosel KHNA240F Kullanım Kılavuzu - Sayfa 3

Güç Kaynağı Cosel KHNA240F için çevrimiçi göz atın veya pdf Kullanım Kılavuzu indirin. Cosel KHNA240F 9 sayfaları. Ac-dc power supplies din rail type

Sayfayı Yazdır

A unit automatically recovers when the fault condition is removed.

Note :

Please avoid applying a voltage exceeding the rated voltage to an

output terminal. Doing so may cause a power supply to malfunc-

tion or fail. If you cannot avoid doing so, for example, if you need

to operate a motor, etc., please install an external diode on the

output terminal to protect the unit.

1.6 Thermal Protection

¿ KHEA120F/240F/480F, KHNA120F/240F/480F

¡ A thermal protection circuit is built-in.

The thermal protection circuit may be activated under the follow-

ing conditions and shut down the output.

1 W hen a temperature continue to exceed the values determined

by the derating curve.

2 W hen a current exceeding the rated current is applied.

3When convection stops.

4 When peak load is applied in conditions other than those shown

in Section 3.

A unit automatically recovers when the fault condition is removed.

1.7 Output Ripple and Ripple Noise

¡ Output ripple noise may be influenced by measurement environ-

ment, measuring method fig 1.1 is recommended.

+Vout

-Vout

Osiloscope/

Ripple noise meter

Bw:20MHz

:Film capacitor 0.1mF

:Aluminum electrolytic capacitor 22 mF

Fig.1.1 Measuring method of Ripple and Ripple Noise

1.8 Remote ON/OFF

¿ KHEA120F/240F/480F, KHNA120F/240F/480F

¡ You can reduce the standby power by Remote ON/OFF.

To do so, connect an external DC power supply and apply a volt-

age to a remote ON/OFF connector.

Table 1.2 Remote ON/OFF Specifications

ON/OFF logic

Between +RC and -RC

L level (0 to 0.5V) or open

Negative

H level (4.5 to 29.5V)

AC-DC Power Supplies DIN Rail Type

Load

150mm

Differential probe

Output voltage

OFF

June 29, 2020

Instruction Manual

Input current

External Power

(20mA max)

Souce

Fig.1.2 Example of use with remote ON/OFF

*1 If the output of an external power supply is within the range of

4.5 - 29.5V, you do not need a current limiting resistor R. If the

output exceeds 29.5V, however, please connect the current limit-

ing resistor R.

To calculate a current limiting resistance value, please use the fol-

lowing equation.

Vcc-(1.1+RiX0.005)

R [W]=

0.005

¡ Please wire carefully. If you wire wrongly, the internal components

of a unit may be damaged.

¡ Remote ON/OFF circuits (+RC and -RC) are isolated from input,

output and PE.

¡ Restart time is 750 ms max .

1.9 Output Voltage Adjustment Range

¡ To increase an output voltage, turn a built-in potentiometer clock-

wise. To decrease the output voltage, turn it counterclockwise.

1.10 Isolation

¡ When you run a Hi-Pot test as receiving inspection, gradually

increase the voltage to start. When you shut down, decrease the

voltage gradually by using a dial. Please avoid a Hi-Pot tester with

a timer because, when the timer is turned ON or OFF, it may gen-

erate a voltage a few times higher than the applied voltage.

¡ When you test a unit for isolation between the output and the

DC_OK, short all terminals of DC_OK.

1.11 Signal Output

Functions of LED indicators and signal output (KHEA series)

¿ KHEA120F/240F/480F, KHNA120F/240F/480F

¡ Functions of LED indicators and signal output in the form of relay

contact are shown below. Checking the presence/absence of volt-

age at the output terminal of a power supply is possible.

Table 1.3 Description of the signal output

Signal Output

DC_OK (LED: Green)

ALARM (LED: Red)

DC_OK (Relay Contact)

*DC_OK signal (relay contact) is built in KHEA series. This circuit

is insulated from other circuits (input and output circuits).

Caution on signal outputs :

¡ The timing of signals might be very depending on models, input

and load conditions. Please make sure enough evaluation.

Inside of a Power

Supply

Ri=2040 W

+RC

-RC

Normal

Output is decreasing

OFF

Short

Open

KH-23