FPSS1U TDK Corporation, FPSS1U Datasheet - Page 11

• 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

3.7 CONNECTING THE LOAD
3.7.1 Load Wiring.
The following considerations should be made to select wiring for connecting the load to the power supply:
* Current carrying capacity of the wire (refer to 3.7.2).
*Insulation rating of the wire should be at least equivalent to the maximum output voltage of the power
supply.
*Maximum wire length and voltage drop (refer to 3.7.2).
*Noise and impedance effects of the load wiring (refer to 3.7.3).
3.7.2 Current Carrying Capacity
Two factors should must be considered while selecting the wire size. 1.Wires should be at least heavy
enough not to overheating while carrying the power supply load current at the rated load, or the current
that would flow in the event the load wires were shorted, whichever is greater.
2.Wire size should be selected to enable voltage drop per lead to be less than 1.0V at the rated current.
Please refer to Tables 3-2 and 3-3 for maximum wire length to limit the voltage drop in American and
European dimensions respectively.
wire size
AWG
Table 3-2:Maximum wire length for 1V drop on lead (in feet).
Cross sect.
Area
(mm^2)
Table 3-3:Maximum wire length for 1V drop on lead (in meters).
For currents not shown in Tables 3-2 and 3-3 , use the formula :
Where current is expressed in ampers and resistivity in ohms/km or ohms/1000ft.
2.5
12
10
10
16
25
35
14
8
6
4
2
0
4
6
Resistivity
Resistivity
Ohm/kft
Ohm/km
Turn off the AC input power before making or changing any rear panel
connection. Ensure that all connections are securely tightened before
applying power. There is a potential shock hazard when using a power
supply with a rated output greater than 40V.
0.9994
0.6285
0.3953
0.2486
0.1564
0.0983
2.526
1.589
0.795
0.565
8.21
5.09
3.39
1.95
1.24
Maximum length=1000/(current*resistivity)
Maximum length in Feet to limit voltage
Maximum length in meters to limit voltage
drop to 1V or less.
drop to 1V or less.
102.6
160.0
250.0
354.0
1200
2000
24.0
39.2
59.0
120
200
320
500
800
5A
5A
80
125.0
177.0
1000
12.0
18.6
29.4
51.2
80.0
WARNING
10A
100
160
250
400
600
10A
40
60
8
14.8
25.6
40.0
62.0
88.0
20A
20A
125
200
300
500
6.0
9.8
20
30
50
80
10.2
16.0
25.2
35.4
50A
50A
125
200
2.4
4.0
5.8
12
20
32
50
80
8
150A
150A
11.8
3.4
0.8
1.4
2.0
3.4
5.4
8.4
10
16
26
40
68
2
6