Instruction manual
2.8 Remote sensing
(It is not in PBA50F and PBA75F.)
¿
PBA100F, 150F
¡
It corresponds by the option : -K. The correspondence model is
-3R3 and -5. Please refer to 7 Option.
¿
PBA300F, 600F, 1000F, 1500F
¡
Remote sensing circuit is built-in.
Wiring method without using remote sensing is shown in Fig.2.2.
When you do not use the remote sensing, connect between +S
and +M and between -S and -M with CN1.
When the power supply is shipped from a factory, a special har-
ness (H-SN-19) is mounted on CN1.
¡
Wiring method with remote sensing is shown in Fig.2.3.
When you use the remote sensing, follow instruction as below.
1
Note connecting wires enough because the load current ows
to sensing line and an internal circuit of power supply is dam-
aged occasionally, when defective contact of the screw such as
loosening happens in the load line.
2
Conrm line drop should be at 0.3V or less using a thick wire
from the power supply to the load.
3
Do not draw the output current from
�
M at CN2.
4
When remote sensing is used, output voltage might become un-
stable because of a impedance of wiring and load condition.
And the power supply should be evaluated enough.
Following are examples to improve it.
-
-S sensing wire is removed and terminals between -M and -S
are shorted.
-
C1, R1 and R2 are connected as below gure.
Please ask details to us.
¿
PBA300F, 600F, 1000F, 1500F
¡
The external output voltage control function is provided.
Adjustment of output voltage is possible in 110% from almost 0V
of the rated output voltage by following.
-
Applying the voltage externally
between TRM and -S on CN1 or CN2
¡
The output voltage level is able to calculated by
1
.
However external voltage should not be less than -0.7V and more
than 3.0V.
Output voltage =
X
rated output voltage
---1
The output voltage decrease when sourcing current from TRM.
¡
When the output voltage is decreased to about 0V, the fans may
stop,ripple may increase and the PG signal may turn to be ”High”.
2.7 Remote ON / OFF
¿
PBA50F, 75F, 100F, 150F
¡
Option ”-R” is available for remote ON / OFF (Refer to 7 Option).
¿
PBA300F, 600F, 1000F, 1500F
¡
Remote ON / OFF control becomes available by applying voltage
in CN1. Remote ON / OFF circuit (RC2, RCG) is isolated from
input, output, FG and AUX.
Table 2.1 shows the specication of remote ON / OFF.
Fig.2.1 shows the example to connect remote ON / OFF control,
and followings are notes when you use the remote control.
1
The output stops when the current is sank in RC2.
2
The current sinking RC2 is 5mA typ and less than 12mA max.
3
Built-in fans stop if the output is turned off with remote ON / OFF
circuit.
The fans of PBA300F become low speed when the output volt-
age is turned off with remote ON / OFF circuit.
4
The PG signal is turns to be ”High” when the output voltage is
turned off with remote ON / OFF.
5
In parallel operation and several use, please note a necessary
voltage and current because the content of Table 2.1 description
is a value at only one use.
6
When the voltage or the current other than showing in Table 2.1
between RC2-RCG are applied, the output voltage might not be
normally output.
Unit type
Instruction Manual
A-24
PBA
Unit type
Instruction Manual
A-25
PBA
Fig.2.1 Examples of connecting
remote ON / OFF
SW close
(0.5V min)
Table 2.1 Specifications of remote ON / OFF
SW open
(0.1mA max)
SW open
(0.1mA max)
SW close
(3mA min)
Output on
Output off
SW open
(0.1mA max)
SW close
(3mA min)
SW Logic
pin
Connection method Fig.2.1 (a) Fig.2.1 (b) Fig.2.2 (c)
RCG AUXG RCG, AUXG
W
W
W
W
W
W
W
The voltage between
TRM and -S
2.5 [V]