IAI America PS-24 - Manual (Page 15)

11
2. RDY Display and RDY Output Signal
In a normal operation, RDY display should be illuminated and RDY output signal should be
turned ON (electrically conducted). In case this RDY display is not illuminated and RDY output
signal is turned OFF, lower the load or add another unit of this power supply.
Take note that there are also other considerable causes that the RDY display light and RDY
output signal are OFF as listed below.
Ÿ Output is stopped due to the effect of the over temperature protection circuit, over voltage
protection circuit, etc.
Ÿ Input power is OFF or low
Also, there will be a failure in normal operation when the over current protection is working.
RDY display and RDY output signal are linked to each other.
Power Status RDY Output Signal RDY Display
Ÿ In normal operation
(When the load is under the specified value)
ON Illuminating
Ÿ Duty ratio exceeds the setting value
Ÿ Output is stopped
Ÿ Power is not input or low
( Ÿ Over current detection circuit is working)
OFF OFF
Please make sure the power supply cable to use satisfies the following specifications:
Item
Specification
Applicable wire
Twisted wire: AWG size 22 (0.3 mm 2 ) (copper wire)
(Note) Pay attention to terminal treatment to avoid a short
circuit resulting from chips. If the wire path is long,
install a relay terminal block and change the wire size.
Input
Terminal
Relay
Terminal Block Power Supply
Terminal Block
AWG18
(0.75mm 2 )
AWG22
(0.3mm 2 )
Insulating sheath temperature
rating 60
°C or more
Stripped wire length
9mm
RDY output signal is insulated with a photocoupler and is an open collector output.
47
7
(C)
(E)
VceMAX
= 30V
IcMAX
= 20mA
Residual voltage: approx. 1.6V (at Ic
= 20mA)
(Note) If connecting this terminal in series, consider the residual voltage.