P Series Data Sheet
90 – 194 Watt DC-DC Converters
Features
• RoHS lead-free-solder and lead-solder-exempted
products available
• Wide input voltage ranges up to 150 VDC
• 1, 2, 3 or 4 isolated outputs up to 96 V
• Class I equipment
• Very high efficiency up to 90%
• Extremely low inrush current, hot- swappable
• Excellent surge and transient protection
• Many output configurations available with flexible
load distribution
• Externally adjustable output voltage
• Inhibit primary referenced
• Redundant operation (n+1), sense lines, current
sharing option
• Extremly slim case (4 TE, 20 mm), fully enclosed
• Hipot test voltage 2.1 kVDC (up to 2.8 kVDC)
• All PCBs coated with protective lacquer
111
4.4"
3U
20
0.8"
4 TE
• Telecom-compatible input voltage range of DP
models according to ETS 300132-2
• CompactPCI-compatible output voltage (xP4720)
164
6.5"
Safety-approved to IEC/EN 60950-1 and UL/CSA
60950-1 2 nd Ed.
Description
These extremely compact DC-DC converters incorporate all
necessary input and output filters, signaling and protection
features, which are required in the majority of applications.
The converters provide important advantages, such as
flexible output power through primary-side current limitation,
extremely high efficiency, excellent reliability, very low ripple
and RFI noise levels, full input-to-output isolation, negligible
inrush current, soft start, overtemperature protection and
input over- and undervoltage lockout.
The converters are particularly suitable for rugged environments, such as railway applications. They have been de-
Table of Contents
signed in accordance with the European railway standards
EN 50155 and EN 50121-3-2. All printed circuit boards are
coated with a protective lacquer. The converter inputs are
protected against surges and transients occurring on the
source lines and cover a total input voltage range from 16 to
150 VDC with five different types. The outputs are
continuously open- and short-circuit proof.
Full system flexibility and n+1 redundant operating mode are
possible due to series or parallel connection capabilities of
the outputs under the specified conditions. When several
converters (with 3.3 and 5.1 V outputs) are connected in
parallel, the T option allows for a single-wire connection
between the converters to ensure good current sharing.
Page
Page
Model Selection .................................................................... 2
Functional Description ......................................................... 6
Electrical Input Data ............................................................. 7
Electrical Output Data .......................................................... 9
Auxiliary Functions ............................................................. 14
Electromagnetic Compatibility (EMC) ............................... 16
Immunity to Environmental Conditions ............................. 18
Mechanical Data ................................................................ 19
Safety and Installation Instructions ................................... 20
Description of Options ....................................................... 23
Accessories ....................................................................... 24
BCD20010-G Rev AF, 19-Dec-2013
MELCHER
The Power Partners.
Page 1 of 25
P Series Data Sheet
90 – 194 Watt DC-DC Converters
LEDs at the front panel and an isolated Out-OK signal
(option) indicate the status of the converter. Voltage suppressor diodes and an independent second control loop
protect the outputs against an internally generated overvoltage.
The converters are designed using planar magnetics
transformers and control circuits in hybrid technology. There
are always two powertrains fitted to a converter, each
consisting either of a regulated single output with synchronous rectifier or of a regulated main output with a
tracking second output. The output power may be flexibly
distributed among the main and the tracking output of each
powertrain. Close magnetic coupling in the transformers
and output conductors together with circuit symmetry ensure
tight tracking of the auxiliary output. The switching frequency
is fixed.
As a modular power supply or as part of a distributed power
supply system, the low-profile design significantly reduces
the required volume without sacrificing high reliability. The
converters are particularly suitable for 19" rack systems
occupying 3U/4TE only, but they can also be chassismounted by means of four screws. Connector type is H15 (or
H15S2 for some single-output models). The fully enclosed
black-coated aluminium case acts as heat sink and RFI
shield and protects the converter together with the coating of
all components against environmental impacts.
Model Selection
Note: Only standard models are listed. Other voltage configurations are possible as well; please contact Power-One !
Table 1a: Model types BP, CP
Output 1, 4
Vo nom
[V]
2
3
4
5
6
7
8
9
Po max
[W]
Vo nom
[V]
Po nom
[W]
Input voltage range and efficiency
Po max
[W]
η
[%]
84 8
2
Vi min – Vi max4
16–36 V
η
[%]
Vi min – Vi max4
84 8
2
Options
33.6–75 V
3.3
5.1
12
15
24
92
122
120
120
120
132
183
192
194
192
-
-
-
87 8
87.5
87.5
88
BP1101-9R
BP1001-9R
BP1301-9R
BP1501-9R
BP1601-9R
88 8
88.5
88.5
89
CP1101-9R
CP1001-9R
CP1301-9R
CP1501-9R
CP1601-9R
-7
D, T 5, K 8
B0, B1, B3
G
3.3
5.1
5.1
12
15
24
46
60
60
60
60
60
66
91
91
96
96
96
5.1
5.1
12
12
15
24
60
60
60
60
60
60
91
91
96
96
96
96
86
87
87
87.5
87.5
88
BP2101-9R
BP2001-9R
BP2020-9R
BP2320-9R
BP2540-9R
BP2660-9R
86
88
88
88.5
88.5
89
CP2101-9R
CP2001-9R
CP2020-9R
CP2320-9R
CP2540-9R
CP2660-9R
-7
D, T 6
B0, B1, B3
G
5.1
5.1
5.1
24
60
60
60
60
91
91
91
96
12, 123
15, 153
24, 243
5.1, 5.13
601
601
601
511
961
961
961
821
87
87.5
87.5
-
BP3020-9R
BP3040-9R
BP3060-9R
-
88
88.5
88.5
87
CP3020-9R
CP3040-9R
CP3060-9R
CP3601-9R
30
601
601
601
50
961
961
961
12,
12,
15,
24,
123
123
153
243
601
601
601
601
961
961
961
961
85
87.5
87.5
88
BP4720-9R9
BP4320-9R
BP4540-9R
BP4660-9R
88.5
88.5
89
CP4720-9R9
CP4320-9R
CP4540-9R
CP4660-9R
5.1,
12,
15,
24,
1
Po nom
[W]
Output 2, 3
3.3 7
12 3
15 3
24 3
-7
D
B0, B1, B3
G
The power of both outputs shall in sum not exceed the total power for the specified ambient temperature.
Min efficiency at Vi nom, Po nom, TA = 25 °C. Typical values are approx. 2% better.
Isolated tracking output (±5% Vo nom, if each output is loaded with ≥ 5% of Po nom). Parallel or series configuration is possible.
Short deviations below Vi min and beyond Vi max according to EN 50155 possible
Only available for models with 5.1 or 3.3 V output.
Option T is only available for outputs with 5.1 or 3.3 V. Opt. T excludes opt. R; refer to table 13, pin allocations
Outputs 5.1 and 3.3 V have a common return. Nominal values: 5.1 V / 4 A, 3.3 V / 3 A. Max. values: 5.1 V / 6.5 A, 3.3 V / 5 A.
H15 standard connector for xP1101 and xP1001 models; without option K, the η value for xP1101 is approx 2% better and for xP1001
approx 1% better than for models with option K.
Compatible to CompactPCI ® specification; for detailed specification contact Power-One.
NFND: Not for new designs
BCD20010-G Rev AF, 19-Dec-2013
Preferred for new designs
MELCHER
The Power Partners.
Page 2 of 25
P Series Data Sheet
90 – 194 Watt DC-DC Converters
Table 1b: Model types DP, EP
Output 1, 4
Input voltage range and efficiency 2
Output 2, 3
Options
Vo nom
[V]
Po nom
[W]
Po max
[W]
Vo nom
[V]
Po nom
[W]
Po max
[W]
η
[%]
Vi min – Vi max
40 – 100.8 V 9
η
[%]
Vi min – Vi max
66 – 150 V
3.3
5.1
12
15
24
92
122
120
120
120
132
183
192
194
192
-
-
-
84 8
88 8
88
88
88.5
DP1101-9R
DP1001-9R
DP1301-9R
DP1501-9R
DP1601-9R
84 8
87.5 8
87.5
87
87.5
EP1101-9R
EP1001-9R
EP1301-9R
EP1501-9R
EP1601-9R
-7
D, T 5, K 8
B0, B1, B3
G
3.3
5.1
5.1
12
15
24
46
60
60
60
60
60
66
91
91
96
96
96
5.1
5.1
12
12
15
24
60
60
60
60
60
60
91
91
96
96
96
96
86
88
88
88
88
88.5
DP2101-9R
DP2001-9R
DP2020-9R
DP2320-9R
DP2540-9R
DP2660-9R
86
87.5
87.5
87.5
87
87.5
EP2101-9R
EP2001-9R
EP2020-9R
EP2320-9R
EP2540-9R
EP2660-9R
-7
D, T 6
B0, B1, B3
G
5.1
5.1
5.1
60
60
60
91
91
91
12, 123
15, 153
24, 243
601
601
601
961
961
961
87.5
88
88
DP3020-9R
DP3040-9R
DP3060-9R
87.5
88
88
EP3020-9R
EP3040-9R
EP3060-9R
5.1, 3.37
12, 123
15, 153
24, 243
30
601
601
601
50
961
961
961
12,
12,
15,
24,
123
123
153
243
601
601
601
601
961
961
961
961
85
88
87.5
88.5
DP4720-9R9
DP4320-9R
DP4540-9R
DP4660-9R
87.5
87
87.5
EP4720-9R9
EP4320-9R
EP4540-9R
EP4660-9R
2
4
2
4
-7
D
B0, B1, B3
G
Table 1c: Model types GP
Output 1, 4
2
3
4
5
6
7
8
9
Options
Vo nom
[V]
Po nom
[W]
Po max
[W]
Vo nom
[V]
Po nom
[W]
Po max
[W]
η2
[%]
Vi min – Vi max4
21.6 – 50.4 V
3.3
5.1
12
15
24
92
122
120
120
120
132
183
192
194
192
-
-
-
84 8
88 8
88
88.5
88
GP1101-9R
GP1001-9R
GP1301-9R
GP1501-9R
GP1601-9R
-7
D, T 5, K 8
B0, B1, B3
G
3.3
5.1
5.1
12
15
24
46
60
60
60
60
60
66
91
91
96
96
96
5.1
5.1
12
12
15
24
60
60
60
60
60
60
91
91
91
96
96
96
86
88
87.5
88
88.5
88
GP2101-9R
GP2001-9R
GP2020-9R
GP2320-9R
GP2540-9R
GP2660-9R
-7
D, T 6
B0, B1, B3
G
5.1
5.1
5.1
60
60
60
91
91
91
12, 123
15, 153
24, 243
601
601
601
961
961
961
87.5
88.5
88.5
GP3020-9R
GP3040-9R
GP3060-9R
30
601
601
601
50
961
961
961
12,
12,
15,
24,
123
123
153
243
601
601
601
601
961
961
961
961
88
88.5
88
GP4720-9R9
GP4320-9R
GP4540-9R
GP4660-9R
5.1,
12,
15,
24,
1
Input voltage range and efficiency 2
Output 2, 3
3.37
123
153
243
-7
D
B0, B1, B3
G
The power of both outputs may in sum not exceed the total power for the specified ambient temperature.
Min efficiency at Vi nom, Po nom, TA = 25 °C. Typical values are approx. 2% better.
Isolated tracking output (±5% Vo nom, if each output is loaded with ≥ 5% of Po nom). Parallel or series configuration possible
Short deviations below Vi min and beyond Vi max according to EN 50155 possible
Only available for models with 5.1 or 3.3 V output
Option T is only available for outputs with 5.1 or 3.3 V. Opt. T excludes opt. R; refer to table 13, pin allocations
Outputs 5.1 and 3.3 V have a common return. Nominal values: 5.1 V / 4 A, 3.3 V / 3 A. Max. values: 5.1 V / 6.5 A, 3.3 V / 5 A.
H15 standard connector for xP1101 and xP1001 models; without option K, the η value for xP1101 is approx 2% better and for
xP1001 approx 1% better than for models with option K.
Compatible to CompactPCI ® specification; for detailed specification contact Power-One.
NFND: Not for new designs
BCD20010-G Rev AF, 19-Dec-2013
Preferred for new designs
MELCHER
The Power Partners.
Page 3 of 25
P Series Data Sheet
90 – 194 Watt DC-DC Converters
Part Number Description
C P 2 5 40 -9 D T B1 G
Input voltage Vi nom:
24 VDC ................................................................ B
48 VDC ................................................................ C
72 VDC ................................................................ D
110 VDC .............................................................. E
36 VDC ............................................................... G
Series .................................................................................... P
Number of outputs:
Single output (160 mm case) 4 .......................................
Double output (160 mm case) 4 .....................................
Triple output (160 mm case) 4 .........................................
Quadruple output (160 mm case) 4 .............................
1
2
3
4
Nominal voltage output 1 /output 4, Vo1/4 nom:
3.3 V ..................................................................... 1
5.1 V ..................................................................... 0
12 V ...................................................................... 3
15 V ...................................................................... 5
24 V ...................................................................... 6
other voltages1 ...................................................................... 7, 8
Other specifications and additional features1 ............ 01, ...99
Nominal voltage output 2 /output 3, Vo2/3 nom:
5.1 V ................................................................... 01
3.3 V ................................................................... 10
12 V .................................................................... 20
15 V .................................................................... 40
24 V .................................................................... 60
other voltages and features1 ............................. 80, ... 99
Operational ambient temperature range TA:
–40 to 71 °C ........................................................ -9
–25 to 71 °C (option, NFND) .............................. -7
other1 ............................................................. 0, -6
Output voltage adjust (auxiliary function) .............................. R
Options:
1
2
3
4
5
Out OK output ...................................................... D
Current sharing .................................................. T 2
H15 standard connector .................................... K 3
Heatsink 20 or 30 mm ......................... B0, B1, B3
RoHS compliant for all 6 substances .............. G 5
Customer-specific models.
Only available for 3.3 V and 5 V outputs. Option T excludes option R, except for single-output models; refer to table 1.
For single-output models with 3.3 V or 5 V output
Models with 220 mm case length. Just add 5000 to the standard model number.
G is always placed at the end of the part number; preferred for new designs.
Note: The sequence of options must follow the order above.
Example: CP2540-9DTB1G: DC-DC converter, input voltage
33.6 to 75 V, 2 regulated outputs each providing 15 V, equipped with option T for output 1, heatsink, ambient temperature
of –40 to 71 °C, RoHS.
Note: All models exhibit the following auxiliary functions, which
are not shown in the type designation: input and output filters,
primary referenced inhibit, sense lines (single-, double- and
triple-output models only) and LED indicators.
BCD20010-G Rev AF, 19-Dec-2013
Product Marking
Basic type designation, safety approval and recognition
marks, CE mark, warnings, pin allocation, Power-One
patents, company logo, specific type designation, input
voltage range, nominal output voltages and output currents,
degree of protection, batch no., serial no. and data code
including production site, modification status and date of
production. Identification of LEDs.
MELCHER
The Power Partners.
Page 4 of 25
P Series Data Sheet
90 – 194 Watt DC-DC Converters
Output Configuration
The P Series allows high flexibility in output configuration to
cover almost every individual requirement, by simply wiring
outputs in parallel, in series, or in independent configuration, as shown in the following diagrams.
connect converters in parallel without measures to
provide reasonable current sharing. Choose suitable
single-output models, if available.
Note: Unused tracking outputs should be connected parallel to
the respective regulated outputs.
Parallel or serial operation of several converters with equal
output voltage is possible, however it is not advantageous to
01010-P
Triple-output
model
Vo1+
4
S1+
12
S1–
14
01006-P
Single-output
model
R
16
Vo+
4
Vo+
6
S+
12
28
i
OK+
22
30
Vi+
OK–
24
32
Vi–
S–
14
Vo–
8
Vo–
10
28 i
30
Vi+
Vo1–
8
32
Vi–
Vo2+
6
Vo2–
10
Vo3+
18
Vo3–
20
Load
S2+
18
Quadrupleoutput
Vo1+
model
Vo1–
4
8
Load 1
Vo4–
14
Load 4
12
28 i
28
i
30
Vi+
32
Vi–
S2–
20
Vo2–
10
S1+
S1–
30
Vi+
Vo4+
32
Vi–
Vo2+
6
Vo2–
10
Vo3+
18
Vo3–
20
Load
Vo1+
4
12
Load 2
Load 3
14
Vo1–
8
Fig. 2
Series output configuration of a double-output model.
The second output is fully regulated.
Fig. 5
Common ground configuration of output 1 with 4 and
independent configuration of output 2 and 3
01012-P
Quadruple- Vo3+
output
Vo3–
model
01013b-P
Double-output
model
Vo1+
4
S1+
12
S1–
14
28 i
Load 3
01011-P
01007-P
6
Load 2
Fig. 4
Independent triple-output configuration. Output 3 is
tracking
Fig. 1
Standard configuration (single-output model)
Double-output
model
Vo2+
Load 1
20
Vo2+
6
Vo2–
10
30
Vi+
Vo4+
12
32
Vi–
28 i
Load 1
18
Load
30
Vi+
Vo1–
8
Vo4–
14
32
Vi–
Vo2+
6
Vo1+
4
S2+
18
R1
16
S2–
20
Vo1–
8
Vo2–
10
Load 2
Fig. 3
Independent double-output configuration. Both outputs
are fully regulated
BCD20010-G Rev AF, 19-Dec-2013
R2
R1
Fig. 6
Series configuration of all outputs (Vo = 96 V for xP4660).
The R1-input influences only outputs 1 and 4. For the
values of R1 and R2 see Output Voltage Adjust.
MELCHER
The Power Partners.
Page 5 of 25
P Series Data Sheet
90 – 194 Watt DC-DC Converters
Functional Description
The power supplies are equipped with two independent
flight-forward converters, switching 180° phase-shifted to
minimize the ripple current at the input. They use primary and
secondary control circuits in hybrid technology. The two
converters, called "powertrains" (PT), each generate either a
single output with synchronous rectifier or two isolated
outputs, one fully regulated and the other one tracking (semiregulated), thus providing up to four output voltages. In some
models, both outputs of a powertrain are internally connected in parallel .
The highly efficient input filter together with very low input
capacitance results in very low and short inrush current. After
transformer isolation and rectification the output filter reduces
ripple and noise to a minimum without affecting the dynamic
response. Outputs 3 and 4, if available, are tracking (semiregulated) and rely upon the close magnetic coupling of the
transformer and the output inductor together with the circuit
symmetry for their voltage regulation. A current limitation
circuit is located on the primary side of each powertrain,
limiting the total output current of that powertrain in overload
conditions. This allows flexible power operation of the
outputs from each powertrain. All outputs can either be
connected in series or in parallel; see Electrical Output Data.
An auxiliary converter provides the bias voltages for the
primary and secondary referenced control logic and the
option circuits. An oscillator generates a clock pulse of
307 ±1% kHz, which is fed to the control logic of each
powertrain. The pulsewidth modulation and the magnetic
feedback are provided by special ASICs. The converter is
only enabled, if the input voltage is within the operating
voltage range.
Double-output powertrains are equipped with an independent monitor sensing the output voltage of the tracking
output. It influences the contol logic in order to reduce via the
pulse width the voltages of both outputs. In addition, the
tracking ouputs are protected by a suppressor diode.
Outputs of single-output powertrains are also protected by a
suppressor diode.
The temperature of the heat sink is monitored and causes
the converter to disable the outputs, until the temperature
drops; then the converter automatically resumes.
03107d
Output
filter PT1
Vo1
Vo4
CY
Vi
Input filter
(with varistor)
Output
filter PT2
CY
2 x in
double-output
power trains
Vo2
Vo3
CY
PT1
Auxiliary
converter
PT2
PT2
Clock
generator
PT1
PWM controller,
duty cycle limiter,
non linear FF,
ON/OFF control of
sync. rectifier
Error amplifier,
Vo monitor
R
Primary options
Secondary options
D, i, T
Fig. 7
Block diagram. Powertrains PT1 and PT2 have isolated outputs.
Pin allocation see table 12
BCD20010-G Rev AF, 19-Dec-2013
MELCHER
The Power Partners.
Page 6 of 25
P Series Data Sheet
90 – 194 Watt DC-DC Converters
Electrical Input Data
General Conditions:
– TA = 25°C, unless TC is specified
– Sense lines connected directly at the connector, inhibit (28) connected to Vi– (32)
– R input open
Table 2a: Input data
Input
BP
Characteristics
Vi
Operating input voltage
Conditions
min
Io = 0 – Io max
TC min – TC max
16
V i nom
Nominal input voltage
V i 100ms
for ≤100 ms
without lockout
14.4
V i abs
for ≤ 3 s
without damage
0
Ii
Typical input current 1
Vi nom, I o nom
Pi 0
1
No-load input power
power 1 4
P i inh
Idle input
Ci
Input capacitance
I inr p
Peak inrush current
t inr rise
Rise time inrush
tr
Rise time inhibit 3
tf
Fall time inhibit 3
td on
Start-up time 3
typ
GP
max
min
36
21.6
40
20
50
0
24
4
Io = 0
1
Vi max, Io max
Io max – Vi nom
0 → Vi min, Io max
min
50.4
33.6
52
28.8
63
0
6.5
4
1.5
1
typ
Unit
max
75
V
48
3.7
220
2
max
36
5.6
Vi min – Vi max
typ
CP
81
100
2.8
6.5
5
1.5
1
220
A
10
W
1.5
107
µF
61
64
66
A
50
32
30
µs
5
5
5
ms
5
5
5
110
150
300
Table 2b: Input data
DP 2
Input
Conditions
min
Vi
Operating input voltage
Io = 0 – Io max
TC min – TC max
40 2
V i nom
Nominal input voltage
V i 100ms
for ≤ 100 ms
without lockout
36
115
55
176
V i abs
for ≤ 3 s
without damage
0
125
0
200
5
11
5
12
1
1.7
1.1
1.7
Ii
Typical input current
Pi 0
No-load input power 1
P i inh
Idle input power 1 4
Ci
Input Capacitance
Iinr p
Peak inrush current
t inr rise
Rise time inrush
tr
Rise time inhibit 3
tf
Fall time inhibit 3
td on
Start-up time 3
1
2
3
4
2
max
min
100.8
66
72
Vi nom, Io nom
Vi min – Vi max
Io = 0
Vi max, Io max
Io max, Vi nom
0 → Vi min, Io max
typ
Unit
Characteristics
1
typ
EP
max
150
V
110
1.9
1.2
A
W
15
15
µF
57
65
A
20
20
µs
5
5
ms
5
6
200
200
Typical values depending on model
According to ETS 300132-2
See fig. 18
Converter inhibited
BCD20010-G Rev AF, 19-Dec-2013
MELCHER
The Power Partners.
Page 7 of 25
P Series Data Sheet
90 – 194 Watt DC-DC Converters
Input Fuse and Reverse Polarity
A fuse mounted inside the converter protects against further
damage in case of a failure. The fuse is not user-accessible.
Reverse polarity at the input will cause the fuse to blow.
Table 3: Fuse specification
Model
Fuse type
Rating
Reference
BP
very fast blow
2 × 10 A, 125 V
Littelfuse Pico 251
GP
very fast blow
2 × 10 A, 125 V
Littelfuse Pico 251
CP
very fast blow
10 A, 125 V
Littelfuse Pico 251
DP
very fast blow
7 A, 125 V
Littelfuse Pico 251
EP
very fast blow
5 A, 250 V
Littelfuse Pico 263
Rext. The whole system is not linear at all and eludes a
simple calculation. One basic condition is given by the
formula:
Vin²
Rext Vo nom ; approximate values (Vi nom, Io nom, series E 96 resistors); R1 not fitted
Vo nom = 3.3 V
Vo nom = 5.1 V
Vo (V)
Ω]
R 1 [kΩ
Vo (V)
R 1 [kΩ
Ω]
3.4
3.5
3.6
47.5
24.3
16.3
5.2
5.3
5.4
5.5
5.6
226.0
115.0
78.7
59.0
48.7
1
Vo nom = 12 V
Vo [V] 1
12.2
12.4
12.6
12.8
13.0
13.2
Vo nom = 15 V
R 1 [kΩ
Ω]
24.4
24.8
25.2
25.6
26.0
26.4
1100
499
332
255
205
174
Vo [V] 1
15.3
15.5
15.7
16.0
16.2
16.5
30.6
31.0
31.4
32.0
32.4
33.0
Vo nom = 24 V
R 1 [kΩ
Ω]
1130
665
475
332
280
232
Vo [V] 1
24.5
25.0
25.5
26.0
26.4
Ω]
R 1 [kΩ
49.0
50.0
51.0
52.0
52.8
1820
909
604
464
392
First column: single-output powertrains or double-output powertrains with separated/paralleled outputs, second column: outputs in
series connection.
Sense Lines
Important: Sense lines should always be connected.
Incorrectly connected sense lines may damage the converter. If
sense pins are left open-circuit, the output voltages are not
accurate.
This feature enables compensation of voltage drop across
the connector contacts and the load lines including ORing
diodes in true redundant systems.
Applying generously dimensioned cross-section load leads
avoids troublesome voltage drop. To minimize noise pick-up,
wire sense lines parallel or twisted to the respective output
line. To be sure, connect the sense lines directly at the
female connector.
The voltage difference between any sense line and its
respective power output pin (as measured on the connector)
should not exceed the following values at nominal output
voltage.
Table 8: Voltage compensation allowed using sense lines
Output type
Total drop
Negative line drop
3.3, 5.1 V output
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