POWERBOX
Industrial Line
OFI1200A Series
1200W Single output
AC/DC Baseplate power supply
2
www.prbx.com
2022.07.21
Specifications are subject to change without notice.
1.2 Isolation from conductive enclosure
There are dangerous voltages inside of the unit. Special attention
needs to be considered when installing the open type of unit.
Ensure proper isolation distances between the components and
conductive enclosure.
d1, d2 = 4mm min
If sufficient isolation distances cannot be secured, an isolation sheet
shall be added between a components and external surfaces.
Fig. 1.3 Isolation distance
To optimize cooling airflow around the unit, ensure that the clearance
between the unit and surrounding objects is as large as possible.
Remarks:
- In case without option -N (with cover) and the enclosure made by
combustible material, the distance d2 shall be more than 13mm
because Varistor is implemented inside of the unit. This requirement
comes from the safety approvals.
1.3 Installation to fulfil EMC requirement
To ensure the best EMI-performance, the equipment should be
mounted inside an earthed metal box.
If it is not possible, an install power supply and a load on an earthed
metal plate.
Input cables should be twisted and places as close to the metal
enclosure as possible.
Output cables of positive (+) and negative (-) should be twisted and
shall be separated from input cables as much as possible.
If radiation from input or output cables are an issue, use appropriate
EMC ferrite clamp on the cables.
When function pins are connected to an user accessible point (i.e.,
panel switch, indicator circuit etc.), these must be protected from
electrostatic discharging.
2. Derating
2.1 Derating curve by input voltage
Fig. 2.1 Derating curve by input voltage
Remarks:
- OFI1200A12 has no input voltage derating.
- The over current protection will be activated as following Fig.2.1.
2.2 Temperature measuring point
For reliable and safe operation, make sure the maximum component
temperature given in Table 2.1 are not exceeded.
The temperature measuring points are shown in Fig. 2.2.
Operating at the maximum temperature rating results in 3-years life
expectancy.
Table 2.1 Maximum operating temperature
Point
Part name
Part
Ref.
Maximum Temperature [
°
C]
Standard
Optional: N
A
Baseplate of Internal
power supply module
-
See Fig. 2.3
See Fig. 2.3
B
Line filter
L102
110
100
C
Aluminium
Electrolytic Capacitor
C405
88
88
D
Aluminium
Electrolytic Capacitor
C501
89
89
Fig. 2.2 Temperature measuring points
d1
d1
d2
(Side view)
B
D
A
C
(Top view)
