3.Output Voltage TRIM

4.Current Sharing

(1)Adjustment of output voltage is possible between 70~100%(Typ.) of the rated output which is shown in Fig. 3.1

(1)Parallel operation is available by connecting the units shown as below

(+S,-S and LS are connected mutually in parallel):

(2)The voltage difference among each output should be minimized that less than 2% is required

(3)The total output current must not exceed the value determined by the following equation

(4) In parallel operation 4 units is the maximum, please consult the manufacture for other

applications

(5) When remote sensing is used in parallel operation, the sensing wire must be connected only

to the master unit

(Output current at parallel operation)=(The rated current per unit) x (Number of unit) x 0.9

File Name:RSP-1500-SPEC 2011- -19

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(2)Connecting a resistor externally between TRIM and-S on CN1 or CN2 that is shown in Fig. 3.2.

(3)+S & +V, -S & -V also need to be connected on CN1 or CN2.

2.Alarm Signal Output

(1)Alarm signal is sent out through "P OK" & "P OK GND" pins

(2)An external voltage source is required for this function. The maximum applied voltage

is 50V and the maximum sink current is 10mA

(3)Table 2.1 explain the alarm function built-in the power supply

Fig. 2.2 Internal circuit of P OK (Open collector method)

External voltage and R

(The max. Sink is 10mA and 50V)

POK GND

POK

Function

POK

The signal is "Low" when the power supply is

65% of the rated output voltage-Power OK

above

Low

(0.5V max at 10mA)

Description

Output of alarm(P OK)

The signal turns to be "High" when the power supply

is under 65% of the rated output voltage-Power Fail

High or open

(External applied voltage

10mA max.)

R

V

0.1uF

100K

+S

Load

V-

V+

-S

LS

LS

-S

+S

CN1

CN2

No.1(Master)

AC/L AC/N

No.2(Slave)

AC/L AC/N

LS

V-

+S

-S

LS

-S

+S

CN1

CN2

V+

AC/N

AC/L

CN2

-S

V-

LS

CN1

+S

-S

LS

+S

V+

AC/L AC/N

LS

V-

+S

-S

LS

-S

+S

CN1

CN2

V+

No.3(Slave)

No.4(Slave)

+V

-V

+S

-S

1500W Single Output Power Supply

470

0

1.8K

OPEN

70%

80%

90%

100%

Vout

R

Fig. 3.1 External Resistor (Typical)

Fig. 3.2 Output voltage trimming

Table 2.1 Explanation of alarm

R(0.5W)

+S

+V

LOAD

-V

-S

TRIM

-S