Cosel FETA2500B Інструкція з експлуатації - Сторінка 5

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Cosel FETA2500B Інструкція з експлуатації

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

4.5 - 12.5V, you do not need a current limiting resistor Ra. If

the output exceeds 12.5V, however, please connect the current

limiting resistor Ra.

To calculate a current limiting resistance value, please use the

FETA

following equation.

Vcc-(1.1+RiX0.005)

Ra[W]=

0.005

2.10 Isolation

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

crease 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

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

2.11 Signal Output (LED/Warning/Alarm)

¡ Functions of LED indicators and Output of Warning/Alarm are

shown below. LED indicators and Output of Warning/Alarm are

signals to check the presence/absence of voltage at the output

terminal of a power supply and to detect warning/fault conditions.

The timing of signals might be vary depending on input and load

conditions. Please make sure enough evaluation.

Table 2.3 Description of LED indicator

LED indicator

OFF

Input power not present

Green - ON

Normal condition

Green - Blinking DC OFF by RC signal

Warning condition

Amber - Blinking

(refer to Table.2.4)

Fault condition

Amber - ON

(refer to Table.2.5)

Table 2.4 Description of the Warnings (WRN signal)

Warning

The WRN signals are "Low"

when the power supply oper-

ates normally.

The signals turn "High" when

AC input voltage is wrong

WRN

(AC<170V, AC>264V) or DC

output voltage is wrong(DC

output voltage is out of volt-

age adjustment range.) or

fan alarm/thermal warning is

detected.

FETA-8

AC-DC Power Supplies Enclosed type

Condition

Output voltage

OFF

Output of Warning

Open collector method

Good : L level

(0 to 0.5V at 3mA)

Bad

: H level or Open

(35Vmax)

Instruction Manual

Table 2.5 Description of the alarms (PG signal)

Alarm

The PG signals are "Low"

when the power supply oper-

ates normally.

The signals turn "High" when

the fan stops or the power

supply stops as a result of

output voltage decrease/stop,

activation of thermal protec-

tion, overvoltage protection,

Low-Voltage protection func-

tions or wrong input voltage

is applied.

0.1mF

Fig.2.4 Internal circuit of WRN

0.1mF

Fig.2.5 Internal circuit of PG

¡ Please note the followings when you use the warnings (WRN sig-

nal) and the alarms (PG signal).

1 The time it takes until the WRN signals and the PG signals turn

"High" vary depending on conditions.

2 If the output voltage is turned off through a remote ON/OFF cir-

cuit, the WRN signals and the PG signals keep "Low".

¡ The WRN signal (Warning) circuit and the PG signal (Alarm) cir-

cuit are isolated from input, output, FG, RC and AUX.

Output of Alarm