PSC129-2IR Power-One, PSC129-2IR Datasheet - Page 9

• Manufacturer Part Number: PSC129-2IR
• Description: Psc Series Extended Positive Switching Regulators Benign
• Manufacturer: Power-One

Table 8: Insulation concept leading to an SELV output circuit
1
2
3
4
Fig. 7
Voltage adjustment with V
Description of Options
With this series, the options i (inhibit) and R (control input
for output voltage adjustment) are defined as a package.
Other combinations or parts of this package are not
available.
R Control for Output Voltage Adjustment
The output voltage V
nal reference voltage ( V
( R
REV. MAY 12, 2004
Conditions Front end
Supply
voltage
Battery
supply,
considered
as secon-
dary circuit
Mains
≤
The front end output voltage should match the specified input voltage range of the switching regulator.
The earth connection has to be provided by the installer according to the relevant safety standard, e.g. IEC/EN 60950.
The installer shall provide an approved fuse (slow blow type with the lowest current rating suitable for the application, max.12.5 A) in
a non-earthed input conductor directly at the input of the switching regulator. If Vo+ is earthed, insert the fuse in the Gi- line. For UL’s
purpose, the fuse needs to be UL-listed. If option C is fitted, a suitable fuse is already built-in in the Vi+ line.
Has to be insulated from earth by double or reinforced insulation according to the relevant safety standard, based on the maximum
output voltage from the front end.
Note:
Caution: To prevent damage V
2.7 V, nor be negative!
250 V AC
ext
V
ext
). The adjustment range is 0 - 100% of V
+
≈ 2.5 V • –––––
V
Minimum required grade
Double or Reinforced
ext
of isolation, to be provided DC output
by the AC-DC front end,
including mains supplied
battery charger
Basic
Double or reinforced
R
G
With open R input, V
V
o nom
V
4000 Ω
V
o
o
ref
can either be adjusted with an exter-
ext
ext
) or with an external resistor
between R and G (Go–)
Vo+
V
+
–
o
ext
o
≈ V
≈ V
must neither exceed
06035
Maximum
voltage
from the
front end
≤
≤
≤
o nom
60 V
60 V
60 V
o nom
• –––––
.
2.5 V
1
o nom
V
ext
Minimum required safety
status of the front end
output circuit
SELV circuit
Earthed SELV circuit
ELV circuit
SELV circuit
. The
Page 9 of 12
Positive Switching Regulators (Benign)
minimum differential voltage D V
put (see: Electrical Input Data ) should be maintained.
Undervoltage look-out = minimum input voltage.
Fig. 8
Voltage adjustment with external resistor R
R
ext
2
≈ –––––––––––
PSC Series Extended Data Sheet
R
ext
4000 Ω • V
V
Switching regulator
Measures to achieve the
specified safety status of the
output circuit
None
None
Input fuse
circuit
case
None
o nom
R
G
4
– V
2
Go –
or non accessible
o
3
o
and earthed output
U
4000 Ω
ref
V
io min
o
≈ ––––––––––––
Vo +
+
–
between input and out-
R
V
ext
o nom
+ 4000 Ω
06040
Result
Safety status of
the switching
regulator output
circuit
SELV circuit
Earthed SELV
circuit
SELV circuit
• R
ext
ext