psb245-7ir Power-One, psb245-7ir Datasheet - Page 11

• Manufacturer Part Number: psb245-7ir
• Description: Psb Series Extended Positive Switching Regulator Industrial
• Manufacturer: Power-One

Table 9: Insulation concept leading to an SELV output circuit
1
2
3
4
5
Description of Options
-9 Extended Temperature Range
The operational ambient temperature range is extended to
T
P Potentiometer
Option P excludes the R-function. The output voltage V
can be adjusted with a screwdriver in the range
92 - 108% V
However, the minimum differential voltage D V
tween input and output voltages as specified in Electrical
Input Data should be maintained.
L Input Filter
Option L is recommended to reduce superimposed inter-
ference voltages and to prevent oscillations, if input lines
exceed approx. 5 m in total length. The fundamental wave
(approx. 120 kHz) of the reduced interference voltage be-
tween Vi+ and Gi– has, with an input line inductance of
5 µH, a maximum magnitude of 60 mVAC. A reduction can
REV. OCT 17, 2003
Conditions Front end
Supply
voltage
Battery
supply,
considered
as secon-
dary circuit
Mains
-250 V AC
The front end output voltage should match the specified input voltage range of the switching regulator.
The conductor to the Gi– terminal of the switching regulator has to be connected to earth 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.
The earth connection has to be provided by the installer according to the relevant safety standard, e.g. IEC/EN 60950.
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.
A
= –40 to 71°C. ( T
o nom
Minimum required grade Maximum
of isolation, to be provided DC output
by the AC-DC front end,
including mains supplied from the
battery charger
Double or Reinforced
Basic
Double or reinforced
.
C
= –40 to 95°C, T
voltage
front end
>60 V
>60 V
>60 V
60 V
60 V
60 V
S
= –55 to 100°C.)
1
Minimum required safety
status of the front end
output circuit
secondary circuit
Unearthed hazardous
voltage secondary circuit
Hazardous voltage
secondary circuit
ELV circuit
secondary circuit
lated unearthed hazardous and non accessible case
voltage secondary circuit
SELV circuit
Earthed hazardous voltage Input fuse
Earthed SELV circuit
Hazardous voltage
SELV circuit
Double or reinforced insu- Input fuse
i o min
Page 11 of 13
be-
o
Positive Switching Regulator (Industrial)
be achieved by insertion of a capacitor across the input
(e.g. plastic foil between Vi+ and Gi–).
The input impedance of the switching regulator at 120 kHz
is about 17 . The harmonics are small in comparison with
the fundamental wave. See also Electrical Input Data: RFI .
With option L, the maximum permissible additionally su-
perimposed ripple u
a specified input frequency f
Units with max input voltage 40 V:
Units with max input voltage 80 V:
2
u
u
i max
i max
4
PSB Series Extended Data Sheet
= 12 V
= 22 V
5
5
Switching regulator
Measures to achieve the
specified safety status of the
output circuit
None
accessible case
Input fuse
non accessible case
Input fuse
circuit
case
None
Input fuse
circuit
case
None
pp
pp
5
5
4
4
at 100 Hz or V
at 100 Hz or V
and non accessible
and non accessbile
i
of the input voltage (rectifier mode) at
3
3
3
3
3
and earthed output Earthed SELV
and non
and earthed output
and unearthed,
and unearthed
5
i
has the following values:
5
pp
pp
5
= 1200 Hz/ f
= 2200 Hz/ f
Result
Safety status of
the switching
regulator output
SELV circuit
Earthed SELV
circuit
Unearthed SELV
circuit
circuit
SELV circuit
circuit
circuit
Unearthed SELV
i
i
• 1V
• 1V