22
Rockwell Automation Publication 1606-RM124A-EN-P - September 2021
DC/DC Converter - 48V/48V, 5 A, 240 W Reference Manual
The following recommendations are for building N+1 redundant power systems:
•
Keep a left/right installation clearance of 15 mm (0.6 in.) between two
devices, and do not install the devices on top of each other.
•
Do not use devices in parallel in mounting orientations other than the
standard mounting orientation or in any other condition, where a
reduction of the output current is required.
•
The ambient temperature cannot exceed 45 °C (113 °F).
Use In a Tightly Sealed
Enclosure
When the device is installed in a tightly sealed enclosure, the temperature
inside the enclosure is higher than outside. In such situations, the inside
temperature defines the ambient temperature for the device.
In the following test setup, the device is placed in the middle of the enclosure,
and no other heat-producing items are inside the enclosure. The load is placed
outside the enclosure.
The temperature sensor inside the box is placed in the middle of the right side
of the DC/DC converter with a distance of 1 cm (0.39 in.). The following
measurement results can be used as a reference to estimate the temperature
rise inside the enclosure.
Figure 26 - 1+1 Redundant Configuration for 5 A Load
Current With a Dual Redundancy Module
Figure 27 - N+1 Redundant Configuration for 15 A Load Current With Multiple DC/DC
Converters and Redundancy Modules
+
-
Functional
Earth
DC/DC
Converter
Input
Input
Output
Output
Input
1
Input ok
1
2
Input
2
Output
Optional
I
I
DC/DC
Converter
Redundacy
Module
Load
Failure
Monitor
Failure
Monitor
+
-
Functional
Earth
Output
Output
Output
Output
Optional
Optional
Input
Input
I
I
I
I
Output
Input
Input
Output
DC/DC
Converter
DC/DC
Converter
Redundacy
Module
Load
DC/DC
Converter
DC/DC
Converter
Redundacy
Module
Input
1
Input ok
1
2
Input
2
Input
1
Input ok
1
2
Input
2
Attributes
Values
Case A
Case B
Enclosure size
110 x 180 x 165 mm
(4.33 x 7.09 x 6.50 in.)
Rittal Typ IP66 Box
PK 9516 100, plastic
110 x 180 x 165 mm
(4.33 x 7.09 x 6.50 in.)
Rittal Typ IP66 Box
PK 9516 100, plastic
Input voltage
48V DC
48V DC
Load
48V, 4 A (=80%)
48V, 5 A (=100%)
Temperature inside the box
43.5 °C (110.3 °F)
48.1 °C (118.6 °F)
Temperature outside the box
26.2 °C (79.2 °F)
26.6 °C (79.8 °F)
Temperature rise
17.3 °C (31.1 °F)
21.5 °C (38.8 °F)
