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Remote On/Off

Parallel Operation

This unit comes with an integral on/off circuit, see wiring 

This power supply can not be configured in parallel with 

diagram below.

another power supply.

Unit DC output is disabled when control voltage is applied 
to RC terminal in reference to –V terminal.

If SW is open or control voltage E is: 0 < E < 4.5V then unit 

output is enabled.

If SW is closed and control voltage E is: 4.5VDC < E 

< 6.5VDC then output is disabled, and no need for current 
limiting resistor R.

If SW is closed and control voltage E is: 6.5VDC < E 

< 24.5VDC, then current limiting resistor R must be = 
(E – (1.1 +1000x0.005))/0.005. For example if E = 24VDC, 
R = (24-(1.1+5))/0.005 = 3.5kΩ

Ripple

Maximum ripple voltage is measured using JEITA 

measurement method prescribed in RC-9131C.

If ripple noise becomes excessive due to line length, 
connect an electrolytic capacitor(47μF) and film capacitor 
(0.1μF) at load side as shown.       

Series Operation

This Daitron power supply unit is configurable in series 

with another Daitron power supply (if it too is configurable 

in Series) in order to increase DC voltage or to provide
both “+” and “–“ DC voltage. 

In these configurations the MAXIMUM current delivered to 

the Load is limited to the maximum allowable from the 

power supply with the lowest current rating. 

To increase VDC (PS1 + PS2) see configuration (1) below. 

Example: If PS1 and PS2 are both 12VDC/30W each, then 

configuration (1) will provide 24VDC/30W

To provide both “+” and “–“ DC voltage to a load see 
configuration (2) below. Example: If PS1 and PS2 are both 

12VDC/30W each, then configuration (2) will p12VDC 

to Load1 and -12VDC to Load2, with a maximum total wattage 

of 30W for both loads combined.

The maximum ripple voltage in the standard specification is a value
measured using the specified measuring circuit in the anechoic
chamber under the JEITA measuring method (See the drawing).
When the load line is long, the ripple on the load edge may become
large unless a capacitor, such as an electrolytic capacitor or a film
capacitor is connected. The output ripple cannot be measured
accurately if the ground lead of the oscilloscope is too long.

2-10

2-8

2-9

2-11

負 

Ta=25C Vin=100Vac, Typical value at the rated output 

10001-005WE-00

Summary of Contents for PFS300A-12

Page 1: ... on the condition that the product is to be used with forced air cooling To prevent the temperature of internal parts from exceeding the specification ensure that the product is exposed to proper airflow when installing Ensure that wires are properly secured to the input and output terminals as specified in this manual Be sure to turn off the power before making the output connection DO NOT use in...

Page 2: ...501 L AC Line S Output Remote Sensing N AC Neutral VS Output Voltage Check Frame Ground S Output Remote Sensing V Output terminal VS Output Voltage Check V Output terminal Not in use V Output terminal Not in use V Output terminal R Remote Control ON OFF R Remote Control ON OFF CN502 not included Connector S8B PHDSS JST Housing PHDR 08VS Terminal SPHD 001T P0 5 Crimping tool AP K2N For proper conne...

Page 3: ... Inrush Current before powering up again Confirm the forced air convection allows for cooling airflow This unit comes with an integral inrush current limiting Remote Sensing circuit using a power thermistor Since SCR is used to prevent inrush current the inrush current limiting circuit may have been released if the The remote sensing function is built in power is turned on again in a short time Be...

Page 4: ...power supply if it too is configurable in Series in order to increase DC voltage or to provide both and DC voltage In these configurations the MAXIMUM current delivered to the Load is limited to the maximum allowable from the power supply with the lowest current rating To increase VDC PS1 PS2 see configuration 1 below Example If PS1 and PS2 are both 12VDC 30W each then configuration 1 will provide...

Page 5: ...n below For Medical 60601 Mounting direction a b c d PFS300A 12 By derating the output power loading rate this product can be used in a wide temperature range PFS300A 15 24 30 48 15V 24V 30V 48V 強制空冷 2m s時 参考 3 2 3 1 Mounting Method PFS300A 2 0m s 0 20 40 60 80 100 10 0 10 20 30 40 50 60 L o a d Ambient Temperature 0 20 40 60 80 100 10 0 10 20 30 40 50 60 L o a d Ambient Temperature 0 20 40 60 80 ...

Page 6: ... Refer to the following drawing to specify each component location Image from the top view Mounting method Forced air cooling method requires air flow from external fans The insertion length of the power supply mounting screw should be 6mm or less Recommended tightening torque for M4 power supply mounting screws 1 4Nm 3 3 L101 Component name X Capacitor Common mode choke 85 115 115 115 Max Temp de...

Page 7: ...e within spec of 100 240VAC 50 60Hz Confirm all input and output connections are in accordance with above Check the output adjustment potentiometer Sometimes output OVP function turns off the output power when the potentiometer is adjusted too high Please note that an excessive capacitive load can create over current situation Confirm remote on off is getting the appropriate voltage for desired op...

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