ETC PT3321C

PT3320 Series
30-W 48-V Input
Isolated DC/DC Converter
SLTS018B
(Revised 4/9/2002)
Features
• Input Voltage Range:
36V to 75V
• 1500 VDC Isolation
• On/Off Control
• Vo Adjust
• Differential Remote Sense
• Current Limit
• Short-Circuit Protection
• Over-Temperature Shutdown
Description
Ordering Information
The PT3320 series is a single-output
isolated DC/DC converter, housed in a
19-pin aluminum SIP package. These
modules are UL, CSA, and VDE approved for telecom applications, and
rated at 30 watts or 8 A. Standard output
voltages range from 1.8 V to 15 V, each
adjustable by up to ±10% of nominal.
Operating features include a remote
on/off control, an under-voltage-lockout
(UVLO), and a differential remote sense.
The PT3320 series also incorporates
many protection features. These include
output current limit, short-circuit protection, and over-temperature shutdown.
A 330µF of output capacitance is
required for proper operation.
PT3321H
PT3322H
PT3323H
PT3324H
PT3325H
PT3326H
PT3327H
PT3328H
•
•
•
•
•
•
•
•
Undervoltage Lockout
UL1950 Recognized
Flexible SIP Package
CSA 22.2 950 Certified
EN60950 Approved
VDE Licensed
4.9 x106 Hrs MTBF
Meets FCC Class A
Radiated Limits
Pin-Out Information
= 3.3V/8A (26.4W)
= 5.0V/6A
= 12.0V/2.5A
= 15.0V/2A
= 2.0V/8A (16W)
= 2.5V/8A (20W)
= 1.8V/8A (14.4W)
= 5.2V/6A
Pin Function
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
PT Series Suffix (PT1234 x )
Case/Pin
Configuration
Order
Suffix
Package
Code *
N
A
C
Vertical
Horizontal
SMD
(EHG)
(EHH)
(EHJ)
* Previously known as package styles 840 &
850.
(Reference the applicable package code drawing for the dimensions and PC board layout)
Do Not Use
Remote On/Off †
Do Not Use
-Vin
-Vin
-Vin
+Vin
+Vin
+Vin
-Vo
-Vo
-Vo
-Remote Sense
+Vo
+Vo
+Vo
+Vo
Vo Adjust †
+Remote Sense
† For more information,
see application notes.
Standard Application
VO Adjust
+REMOTE SENSE
18
+VIN
7, 8, 9
4-6
13
–VIN
L
O
A
D
10-12
CIN
Inhibit
+VO
14-17
PT3320
2
+
19
+
COUT
Q1
R1
–VO
C1
–REMOTE SENSE
Cin
Cout
Q1
R1/C1
For technical support and more information, see inside back cover or visit www.ti.com
= Optional 100µF/100V electrolytic
= Required 330µF electrolytic (See Notes)
= N-Channel MOSFET
= Optional (see application notes)
PT3320 Series
30-W 48-V Input
Isolated DC/DC Converter
Specifications
(Unless otherwise stated, T a =25°C, Vin =48V, Cout =330µF, and Io =Iomax)
Characteristic
Symbol
Output Current
Io
Conditions
Over Vin range
Vo = 15V
Vo = 12V
Vo =5.0V
Vo ≤ 3.3V
Input Voltage Range
Set Point Voltage Tolerance
Vin
Vo tol
Over Io Range
Temperature Variation
Line Regulation
Regtemp
Regline
–40° ≤Ta ≤ +85°C
Over Vin range
Load Regulation
Regload
Over Io range
Total Output Voltage Variation
∆Votot
Includes set-point, line, load,
–40° ≤Ta ≤ +85°C
Efficiency
η
Vo Ripple (pk-pk)
Vr
20MHz bandwidth
Transient Response
ttr
0.1A/µs load step, 50% to 100% Iomax
Vo over/undershoot
Vo ≥ 5.0V
Vo ≤ 3.3V
∆Vtr
Short Circuit Current
Switching Frequency
Isc
ƒs
Under-Voltage Lockout
UVLO
Remote On/Off Input (pin 2)
Input High Voltage
Input Low Voltage
Input Low Current
VIH
VIL
IIL
Standby Input Current
Internal Input Capacitance
External Output Capacitance
Iin standby
Cin
Cout
Isolation Voltage
Capacitance
Resistance
Operating Temperature Range
Maximum Case Temperature
Storage Temperature Range
Reliability
Ta
Tc
Ts
MTBF
Mechanical Shock
—
Mechanical Vibration
—
Weight
Flammability
—
—
Vo ≥5.0V
Vo ≤3.3V
Over Vin range
Vo ≥5.0V
Vo ≤3.3V
Vo ≥5.0V
Vo ≤3.3V
Vo ≥5.0V
Vo ≤3.3V
Vo = 15V
Vo = 12V
Vo =5.0V
Vo =3.3V
Vo =1.8V
Vo ≥ 5.0V
Vo ≤ 3.3V
Vo >10V
Vo <10V
Vin increasing
Vin decreasing
Referenced to –Vin (pins 4–6)
pins 2 & 4 connected
Between +Vo and –Vo
Input-output/input-case
Input-output
Input-output
Over Vin range
Per Bellcore TR-332
50% stress, Ta =40°C, ground benign
Per Mil-Std-883D, method 2002.3,
1mS, half-sine, mounted to a fixture
Per Mil-Std-883D, method 2007.2,
20-2000Hz, soldered in board
—
Materials meet UL 94V-0
PT3320 SERIES
Typ
Max
Min
Vo ≥ 9V
Vo ≤ 5V
0.1
0.1
0.25
0.25
36.0
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
400
600
—
—
Units
—
—
—
—
48.0
±1
±33
±0.5
±0.2
±7
±0.4
±13
±2
±67
85
87
84
80
69
1.0
50
100
±3.0
±100
2xIomax
500
750
34
33
2.0
2.5
6.0
8.0
75.0
±1.5
±50
—
±1.0
±33
±1.0
±33
—
—
—
—
—
—
—
2.0
75
200
±5.0
±150
—
600
900
—
—
2.5
–0.2
–3
—
—
260
260
1500
—
10
-40 (4)
—
-40
—
—
–6
8
0.66
330
330
—
1200
—
—
—
—
15 (2)
+0.8
–10
16
—
600 (3)
1,000 (3)
—
—
—
+85 (5)
100
+125
Vdc
pF
MΩ
°C
°C
°C
4.9
—
—
106 Hrs
—
500
—
G’s
—
10
—
G’s
—
43
—
grams
(1)
(1)
(1)
(1)
A
V
%Vo
mV
%Vo
%Vo
mV
%Vo
mV
%Vo
mV
%Vo
mVpp
µs
%Vo
mV
A
kHz
V
V
µA
mA
µF
µF
Notes: (1) The DC/DC converter will operate at no load with reduced specifications.
(2) The Remote On/Off input has an internal pull-up. If it is left open circuit the module will operate when input power is applied. A low-leakage
(<100nA) MOSFET is recommended to control this input. The open-circuit voltage is less than 10V. See application notes for interface considerations.
(3) Output capacitor values are absolute. Allowances must be made for any additional de-coupling capacitors and the total external capacitor tolerance.
The value of external capacitance is limited due to regulator startup current requirements. Consult the factory for further details.
(4) For operation below 0°C, the required external output capacitor must have temperature stable characteristics. E.g. Tantalum or Oscon® types.
(5) See Safe Operating Area curves or contact the factory for the appropriate thermal derating.
For technical support and more information, see inside back cover or visit www.ti.com
Typical Characteristics
PT3320 Series
30-W 48-V Input
Isolated DC/DC Converter
PT3321, 3.3 VDC
PT3322, 5.0 VDC
(See Note A)
Efficiency vs Output Current
Efficiency vs Output Current
VIN
70
48.0V
36.0V
60.0V
75.0V
90
80
60
VIN
48.0V
60.0V
36.0V
75.0V
70
60
40
0
2
4
6
8
50
0
1
2
Iout (A)
5
6
0
10
40
75.0V
60.0V
48.0V
36.0V
30
20
Ripple - mV
20
6
8
80
1
2
3
4
5
6
0
Power Dissipation vs Output Current
Power Dissipation vs Output Current
4
75.0V
60.0V
36.0V
48.0V
2
6
VIN
4
75.0V
36.0V
60.0V
48.0V
6
8
75.0V
60.0V
48.0V
36.0V
4
0
1
2
Iout (A)
3
4
5
0
6
0.5
1
Safe Operating Area, Vin =48V (See Note B)
60
50
40
30
20
80
Airflow
70
200LFM
120LFM
60LFM
Nat conv
60
50
40
30
8
80
Airflow
70
200LFM
120LFM
60LFM
Nat conv
60
50
40
30
20
20
6
2.5
Safe Operating Area, Vin =48V (See Note B)
Ambient Temperature (°C)
Nat conv
60LFM
120LFM
200LFM
Ambient Temperature (°C)
Airflow
70
2
90
90
80
1.5
Iout (A)
Iout (A)
Safe Operating Area, Vin =48V (See Note B)
Iout (A)
VIN
2
0
90
2.5
6
0
4
2
Power Dissipation vs Output Current
2
0
1.5
8
Pd - Watts
VIN
Pd - Watts
6
4
1
Iout (A)
8
2
0.5
Iout (A)
8
0
75.0V
60.0V
48.0V
36.0V
0
0
Iout (A)
2
VIN
120
0
4
2.5
40
10
0
2
160
VIN
Ripple - mV
75.0V
60.0V
48.0V
36.0V
30
1.5
Ripple vs Output Current
50
0
1
200
VIN
2
0.5
Iout (A)
60
40
Ripple - mV
4
Ripple vs Output Current
Ripple vs Output Current
Pd - Watts
3
Iout (A)
50
0
36.0V
48.0V
60.0V
75.0V
70
60
50
50
VIN
80
Efficiency - %
80
(See Note A)
Efficiency vs Output Current
90
Efficiency - %
Efficiency - %
90
Ambient Temperature (°C)
PT3323, 12.0 VDC
(See Note A)
0
1
2
3
4
5
6
Iout (A)
0.0
0.5
1.0
1.5
Iout (A)
Note A: All data listed in the above graphs has been developed from actual products tested at 25°C. This data is considered typical data for the DC-DC Converter.
Note B: SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating temperature.
For technical support and more information, see inside back cover or visit www.ti.com
2.0
2.5
Application Notes
PT3320/3340/4560/4580 Series
Adjusting the Output Voltage of Power Trends’
30W Isolated DC/DC Converter Series
The factory pre-set output voltage of Power Trends’ 30W
series of isolated DC/DC converters may be adjusted
within a nominal ±10% range. This is accomplished with
the addition of a single external resistor. For the input
voltage range specified in the data sheet, Table 1 gives the
allowable adjustment range for each model as Vo (min)
and Vo (max).
Adjust Up: An increase in the output voltage is obtained
by adding a resistor, R2 between Vo adjust (pin 18), and
-Remote Sense (pin 13). See note 4.
3. If the remote sense pins are not being used, the resistors
(R1) and R2 can be connected to +Vout or -Vout
respectively.
4. The adjusted output voltage, Va effectively sets the voltage
across pins 13 and 19 (±Remote Sense). When using the
remote sense pins, Vout (measured directly across pins 10–
12, and 14–17) can be significantly higher than Va, and may
exceed Vo (max). If Va is adjusted upward of Vo(max), the
the minimum input voltage is increased by the same
percentage as Vout exceeds Vo(max).
The values of (R1) [adjust down], and R2 [adjust up], can
also be calculated using the following formulas.
Adjust Down: Add a resistor (R1), between Vo adjust (pin
18), and +Remote Sense (pin 19).
Refer to Figure 1 and Tables 2 & 3 for both the placement and
value of the required resistor, (R1) or R2.
(R1)
=
Ko (Va – Vr)
Vr (Vo – Va)
– Rs
kΩ
R2
=
Ko
(Va – Vo)
– Rs
kΩ
Notes:
1. Use only a single 1% resistor in either the (R1) or R2
location. Place the resistor as close to the ISR as possible.
2. Never connect capacitors to Vo adjust. Any capacitance
added to the Vo adjust control pin will affect the stability of
the ISR.
Where
= Original output voltage
= Adjusted output voltage
= Reference voltage (Table 1)
= Multiplier constant (Table 1)
= Series resistance (Table 1)
Vo
Va
Vr
Ko
Rs
Table 1
DC/DC CONVERTER ADJUSTMENT RANGE AND FORMULA PARAMETERS
Series Pt #
AL Case:
24V Bus
48V Bus
CU Case:
24V Bus
48V Bus
Vo(nom)
Vo(min)
Vo(max)
Vr
Ω)
Ko (V·kΩ
Ω)
Rs (kΩ
PT3327
PT3325
PT3326
PT3341
PT3321
PT3342
PT3322
PT4567
PT4565
PT4566
PT4581
PT4561
PT4582
PT4562
PT4585
1.8V
1.62V
2.5V
1.225V
69.58
80.6
1.8V
1.62V
1.98V
1.225V
69.58
80.6
2.0V
1.8V
2.2V
1.225V
62.47
150.0
2.5V
2.25V
2.75V
1.225V
42.33
121.0
3.3V
2.95V
3.65V
1.225V
68.89
150.0
5.0V
4.5V
5.5V
1.225V
68.71
121.0
PT3343
PT3323
PT3344
PT3324
PT4571
PT4583
PT4563
PT4584
PT4564
9.0V
7.0V
10.0V
2.5V
133.25
110
12.0V
10.8V
13.2V
2.5V
135.9
90.9
15.0V
13.5V
16.5V
2.5V
137.5
80.6
Figure 1
2
Remote
On/Off
+ V in
7, 8, 9
30W Isolated
+Vin
-Vin
4, 5, 6
Cin
1 0 0 µF
100V
(Optional)
19
Sns(+)
-Vout
10 - 12
Sns(-)
13
+Vout
14 - 17
+ V out
Vo(adj)
18
(R1)
Adj Down
+
Cout
3 3 0µF
R2
Adj
Up
-V in
For technical support and more information, see inside back cover or visit www.ti.com
+
L
O
A
D
-V out
Application Notes continued
PT3320/3340/4560/4580 Series
Table 2
DC/DC CONVERTER ADJUSTMENT RESISTOR VALUES
Series Pt #
AL Case
24V Bus
48V Bus
CU Case
24V Bus
48V Bus
Current
Vo(nom)
Va(req’d)
1.65
1.7
1.75
1.8
1.85
1.9
1.95
2.0
2.05
2.1
2.15
2.2
2.25
2.3
2.35
2.4
2.45
2.5
2.55
2.6
2.65
2.7
2.75
2.95
3.0
3.05
3.1
3.15
3.2
3.25
3.3
3.35
3.4
3.45
3.5
3.55
3.6
3.65
PT3327
PT3325
PT3326
PT3341
PT3321
PT4567
8Adc
1.8V
PT4565
8Adc
2.0V
PT4566
8Adc
2.5V
PT4581
PT4561
8Adc
3.3V
PT4585
8Adc
1.8V
(80.3)kΩ
(189.0)kΩ
(516.0)kΩ
(80.3)kΩ
(189.0)kΩ
(516.0)kΩ
1.31MΩ
615.0kΩ
383.0kΩ
267.0kΩ
198.0kΩ
151.0kΩ
118.0kΩ
93.3kΩ
74.0kΩ
58.6kΩ
45.9kΩ
35.4kΩ
26.4kΩ
18.8kΩ
1.31MΩ
615.0kΩ
383.0kΩ
R1 = (Blue)
(62.5)kΩ
(194.0)kΩ
(589.0)kΩ
1.1MΩ
475.0kΩ
266.0kΩ
162.0kΩ
(20.7)kΩ
(64.7.0)kΩ
(138.0)kΩ
(285.0)kΩ
(726.0)kΩ
726.0kΩ
302.0kΩ
161.0kΩ
90.6kΩ
48.3kΩ
(127.0)kΩ
(183.0)kΩ
(261.0)kΩ
(377.0)kΩ
(572.0)kΩ
(961.0)kΩ
(2.13)MΩ
1.23MΩ
539.0kΩ
309.0kΩ
194.0kΩ
126.0kΩ
79.6kΩ
46.8kΩ
R2 = Black
For technical support and more information, see inside back cover or visit www.ti.com
Application Notes
PT3320/3340/4560/4580 Series
Table 3
DC/DC CONVERTER ADJUSTMENT RESISTOR VALUES
Series Pt #
AL Case
24V Bus
48V Bus
CU Case
24V Bus
48V Bus
Current
Vo(nom)
Va(req’d)
4.5
4.55
4.6
4.65
4.7
4.75
4.8
4.85
4.9
4.95
5.0
5.05
5.1
5.15
5.2
5.25
5.3
5.35
5.4
5.45
5.5
PT3342
PT3322
PT4582
PT4562
6Adc
5.0V
(246.0)kΩ
(293.0)kΩ
(352.0)kΩ
(428.0)kΩ
(529.0)kΩ
(670.0)kΩ
(882.0)kΩ
(1.23)MΩ
(1.94)MΩ
566.0kΩ
337.0kΩ
223.0kΩ
154.0kΩ
108.0kΩ
75.3kΩ
50.8kΩ
31.7kΩ
16.4kΩ
R1 = (Blue)
PT4571
3.3Adc
9.0V
Va(req’d)
7.0
7.2
7.4
7.6
7.8
8.0
8.2
8.4
8.6
8.8
9.0
9.2
9.4
9.6
9.8
10.0
•
10.8
11.0
11.2
11.4
11.6
11.8
12.0
12.2
12.4
12.6
12.8
13.0
13.2
•
13.5
13.6
13.8
14.0
14.2
14.4
14.6
14.8
15.0
15.2
15.4
15.6
15.8
16.0
16.5
PT3343
PT3323
PT3344
PT3324
PT4583
PT4563
2.5Adc
12.0V
PT4584
PT4564
2.0Adc
15.0V
(9.9)kΩ
(29.2)kΩ
(53.2)kΩ
(84.2)kΩ
(125.0)kΩ
(183.0)kΩ
(270.0)kΩ
(414.0)kΩ
(703.0)kΩ
(1.57)MΩ
556.0kΩ
223.0kΩ
112.0kΩ
56.6kΩ
23.3kΩ
(285.0)kΩ
(371.0)kΩ
(500.0)kΩ
(715.0)kΩ
(1.15)MΩ
588.0kΩ
249.0kΩ
136.0kΩ
78.9kΩ
45.0kΩ
22.3kΩ
(323.0)kΩ
(355.0)kΩ
(437.0)kΩ
(522.0)kΩ
(724.0)kΩ
(1010.0)kΩ
(1.58)MΩ
607.0kΩ
263.0kΩ
149.0kΩ
91.3kΩ
56.9kΩ
11.1kΩ
R2 = Black
For technical support and more information, see inside back cover or visit www.ti.com
Application Notes
PT3320/3340/4560/4580 Series
Using Remote On/Off on Power Trends’
30W Isolated DC-DC Converter Series
Power Trends’ 30W isolated series of DC/DC converters
incorporate a Remote On/Off function. This function may
be used in applications for battery conservation, powerup/shutdown sequencing, or to co-ordinate the power-up
of the regulator for active in-rush current control. (See
TI application reports, SLTA021, and SLUA250).
The Remote On/Off function is provided by pin 2. If
pin 2 is left open-circuit, the converter provides a regulated output whenever a valid source voltage 1 is applied
between +Vin (pins 7-9), and –Vin (pins 4-6). Applying
a low voltage 2, with respect to –Vin (pin 2), disables the
regulator output 3. Table 1 details the control requirements
for this input. Figure 1 shows how a discrete MOSFET
(Q1) may be referenced to the negative input voltage rail
to control the Remote On/Off pin.
6. Keep the on/off transition to less than 1ms. This prevents
erratic operation of the ISR, whereby the output voltage
may drift un-regulated between 0V and the rated output
voltage during power-up.
7. In Figure 1, Q1 is a low-threshold MOSFET. The
components R1 and C1 are added to improve noise
susceptibility.
Figure 1
2
Remote
On/Off
7, 8, 9
+V in
19
Sns(+)
30W Isolated
+Vin
-Vin
4, 5, 6
+
-Vout
10 - 12
Sns(-)
13
+Vout
14 - 17
18
+
C in
C out
2
Table 1 Remote On/Off Control Requirements
Parameter
min
max
Enable (VIH)
2.5V 5
15V (or open circuit)
Disable (VIL)
–0.3V
C1
0.01µF
4
0.8V
Table 2 UVLO Thresholds
Series
UVLO Threshold
PT3320/4560
PT3340/4580
34 ± 2.0V
16.5 ± 1.5V
Vin Range
36 – 75V
18 – 60V
2. The Remote On/Off control pin uses –Vin (pins 4-6) as its
ground reference. All voltages specified are with respect to
–Vin.
3. When the converter output is disabled the current drawn
from the input supply is typically reduced to 8mA (16mA
maximum).
4. The internal circuitry comprises of a high impedance (3µA
-10µA) current source. The open-circuit voltage is less
than 10V.
5. The Remote On/Off pin is ideally controlled using devices
with an open-collector (or open-drain) output. A small
low-leakage MOSFET (<100nA) is recommended. A
pull-up resistor is not required, but may be necessary to
ensure that the Remote On/Off pin exceeds VIH(min)
(see Table 1). Do not use a pull-up resistor to the +Vin
input, or drive the pin above VIH(max).
Q1
BSS138
-V in
–V o
OFF/ ON
Notes:
1. These converters incorporate an “Under Voltage Lockout”
(UVLO) function. This function automatically holds the
converter output in the “Off” state until there is sufficient
input voltage for the converter to produce a regulated
output. Table 2 gives the applicable UVLO thresholds.
+V o
Vo(adj)
R 1 , 10 k
R 1 & C1 -See Note 7
Turn-On Time: When the Remote On/Off input is left
open-circuit, the output of the converter is automatically
enabled when a valid input voltage 1 is applied to the
input power pins. The converter typically rises to full
regulation within 30ms of the application of power (or
after the release of the Remote On/Off pin with input
power applied). The actual turn-on time will vary with
the input voltage, output load, and the total amount of
capacitance connected to the output. Using the circuit of
Figure 1, Figure 2 shows the typical output voltage and
input current waveforms for a PT3322/PT4562 after Q1
is turned off. The turn off of Q1 correlates with the fall
of the Q1 Vgs waveform. The waveforms were measured
with a 48Vdc input voltage, and 5-A resistive load.
Figure 2
Vo (2V/Div)
Iin (0.5A/Div)
Q1Vgs (10V/Div)
HORIZ SCALE: 2ms/Div
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Application Notes
PT3320/3340 Series
VDE Approved Installation Instructions (Installationsanleitung)
Nennspannnug (Rated Voltage):
PT3320 36 to 72 Vdc, Transient to 75Vdc
PT3340 18 to 60 Vdc
Nennaufnahme (Rated Input):
PT3320 1.5 Adc
PT3340 3.0 Adc
Nennleistung (Rated Power):
30 Watts Maximum
Ausgangsspannung (Sec. Voltage): PT3320 Series
PT3321, 3.3 Vdc, 8.0 Adc
PT3322, 5.0 Vdc, 6.0 Adc
Ausgangsstrom (Sec. Current):
PT3323, 12.0 Vdc, 2.5 Adc
oder (or)
PT3324, 15.0 Vdc, 2.0 Adc
Ausgangsleistung (Sec. Power):
PT3325, 2.0 Vdc, 8.0 Adc
PT3326, 2.5 Vdc, 8.0 Adc
PT3327, 1.8 Vdc, 8.0 Adc
PT3328, 5.2 Vdc, 6.0 Adc
PT3329, 6.0 Vdc, 5.0 Adc
PT3330, 8.0 Vdc, 3.75 Adc
PT3331, 9.0 Vdc, 3.3 Adc
PT3340 Series
PT3341, 3.3 Vdc, 8.0 Adc
PT3342, 5.0 Vdc, 6.0 Adc
PT3343,12.0 Vdc, 2.5 Adc
PT3344,15.0 Vdc, 2.0 Adc
Angabe der Umgebungstemperatur
(Information on ambient temperature): +85°C Ambient or 100°C Case Maximum
Besondere Hinweise (Special Instructions):
Es ist vorzusehen, daß die Spannungsversorgung in einer Endanwendung über eine isolierte
Sekundaerschaltung bereit gestellt wird. Die Eingangspannung der Spannungsversorgungsmodule muss
eine verstaerkte Isolierung von der Wechselstromquelle aufweisen.
Die Spannungsversorgung muss gemaess den Gehaeuse-, Montage-, Kriech- und Luftstrecken-,
Markierungs- und Trennanforderungen der Endanwendung installiert werden. Bei Einsatz eines TNV-3Einganges muss die SELV-Schaltung ordnungsgemaess geerdet werden.
(The power supply is intended to be supplied by isolated secondary circuitry in an end use application.
The input power to these power supplies shall have reinforced insulation from the AC mains.
The power supply shall be installed in compliance with the enclosure, mounting, creepage, clearance,
casualty, markings, and segregation requirements of the end-use application. When the input is TNV-3,
the SELV circuitry must be reliably grounded.)
Offenbach,
VDE Prüf- und Zertifizierungsinstitut
Abteilung / Department TD
Ort / Place:
Datum / Date:
(Stempel und Unterschrift des Herstellers / Stamp
and signature of the manufacturer)
(Jürgen Bärwinkel)
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