lh2320-2 Power-One, lh2320-2 Datasheet - Page 15

• Manufacturer Part Number: lh2320-2
• Description: H Series Data Sheet 70 Watt Ac-dc Converters
• Manufacturer: Power-One

Table 12: Isolation
Safety of Operator-Accessible Output Circuits
If the output circuit of a DC-DC converter is operator-
accessible, it shall be an SELV circuit according to the safety
standard IEC/EN 60950.
The table below shows a possible configuration, compliance
with which causes the output to be an SELV circuit up to a
configured output voltage of 36 V (sum of the nominal voltages
connected in series).
Table 13: Safety concept leading to an SELV output circuit
Description of Options
D Undervoltage Monitor
The input and/or output undervoltage monitoring circuit
operates independently of the built-in input undervoltage
lockout circuit. A logic "low" (JFET output) or "high" signal
(NPN output) is generated at pin 5, as soon as one of the
monitored voltages drops below the preselected threshold
Table 14: Survey of options
BCD20019 Rev AB
Table 15: Undervoltage monitor functions
Characteristic
Electric
strength
test
Insulation resistance at 500 VDC
1
2
Conditions
Nominal Supply
voltage
Mains 250 V AC
1
1
1
2
The earth connection has to be provided by the installer according to the relevant safety standards, e.g. IEC/EN 60950
Option
According to EN 50116 and IEC/EN 60950, subassemblies connecting input to output are pre-tested with 5.6 kVDC or 4 kVAC.
Tested at 300 VDC
Option V is only available for models with 5.1 V main output; it excludes option D.
Threshold level adjustable by potentiometer (not recommended for mobile applications)
Fixed value between 95% and 98% of V
JFET
V
D1
D2
D3
D4
D
Output type
1
Factory test >1 s
AC test voltage equivalent
to factory test
Function of Option
Input and/or output undervoltage monitoring circuitry
Input and output undervoltage monitoring circuitry
NPN
D5
D6
D7
D8
AC-DC converter
Grade of insulation between
input and output, provided
by the AC-DC converter
Double or reinforced
®
yes
yes
no
no
V
Monitoring
i
yes
yes
yes
no
V
o1
o1
and output(s)
(tracking)
Input to case
>300
2.8
2.0
V
V
1
i min
i min
Minimum adjustment range
– V
– V
V
–
–
ti
of threshold level V
Installation
Measures to achieve the resulting
safety statuts of the output circuit
Earthed case
according to the applicable standards
i max
i max
Page 15 of 21
1
1
Output(s) to
>300
case
1.4
1.0
level V
recovers, when the monitored voltages exceeds V
threshold level V
through a hole in the front cover.
Option D exists in various versions D1 – D8 as shown in table
15.
Safe data signal output (D1 – D8)
Characteristic
ACFAIL signal according to VME specifications ( V2, V3)
Fig. 17
Schematic safety concept.
Earth connection
0.95 – 0.98 V
0.95 – 0.98 V
1
3.5 V – 48 V
and installation
t
. The return for this signal is Vo1– (pin 23). The D output
V
–
t
to
Mains
Output to
o1
o1
1
output
>100
2
2
0.3
0.2
~
~
t
is adjustable by a potentiometer, accessible
2
70 Watt AC-DC Converters
Fuse
Fuse
Typical hysteresis V
3.0 – 0.5
3.0 – 0.5
V
–
–
kVDC
kVAC
hi
Unit
Result
Safety statuts of the AC-DC
converter output circuit
SELV circuit
M
H Series Data Sheet
for V
AC-DC
verter
t min
con-
www.power-one.com
10021a
– V
h
t max
[% of V
2.3 – 1
V
"0"
"0"
–
ho
t
+ V
SELV
+
–
t
]
h
. The