FPSS1U TDK Corporation, FPSS1U Datasheet - Page 25

• Manufacturer Part Number: FPSS1U
• Description: RACK 3 SLOT FOR FPS1000
• Manufacturer: TDK Corporation
• Series: FPSr

Specifications of FPSS1U

• Accessory Type: Rack System
• No. Of Slots: 3
• Peak Reflow Compatible (260 C): No
• External Width: 19.00"
• Rack U Height: 1
• External Depth: 13.82"
• For Use With: 285-1239 - PWR SUP FNT END 48V 1008W 21A285-1238 - PWR SUP FNT END 32V 992W 31A285-1237 - PWR SUP FNT END 24V 960W 40A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: FPS1000 Series
• Lead Free Status / Rohs Status: RoHS Compliant part
• Other names: 285-1240

7.5.3 Internal temperature measurement
The internal ambient temperature is measured to provide information of the safe operation of the power supply. The
internal ambient temperature is usually higher than the power supply air intake temperature due to internal power
dissipation. As the power dissipation varies with the load, the internal ambient temperature increases with the load.
Refer to Fig 7-2 for typical internal temperature rise above the air intake temperature versus the load.
Internal temperature calculation example:
1. Hex readback: 68 (0110 1000).
2. Convert hex readback to decimal: 104
3. Calculate the measured temperature:
Temp=104*0.391=40.664
7.6 Typical application diagram
A typical application is described in Fig 7-3.
PC
Fig 7-2: Internal temperature rise vs. load
Fig 7-3: Typical application of I
RS232
Internal temp.
rise (°C)
RS232
CABLE
15
10
o
5
0
C
CONVERTOR
RS232 TO
2
I
C interface
2
C
25
GND
CLOCK
DATA
50
22
SCL
SDA
RETURN
SIGNAL
A0
FPS1000
75
A1
ON/OFF
ON/OFF
CONTROL
100
A2
ADDRESS
SETTING
+S
+V
-V
-S
% of rated load
+
-
LOAD