FPSS1U TDK Corporation, FPSS1U Datasheet - Page 19

• 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

CHAPTER 6 PARALLEL AND SERIES OPERATION
6.1 Parallel operation
Up to 8 FPS1000 units of the same output voltage rating can be connected in parallel. By connecting the CS signal
between the paralleled units, automatic current balance is achieved, with +/-10% accuracy. Derate the total output
current by 10% when using parallel operation to prevent overload condition.
The built-in Oring diodes on the main output and the 12V Auxiliary output allow N+1 operation.
For input voltages less than 100Vac, maximum output Power derated by 10% of the Power rating.
6.1.1 Parallel operation with Remote sensing
Fig 6-1 shows typical connection of parallel operation with Remote sensing. The CS signal wires should be as short
as possible and with the same length.
6.1.2 Output voltage trimming at parallel operation
The output voltage of the units connected in parallel can be made by a single trimmer or resistive divider as shown
in Fig 6-2.
Fig 6-2: Output voltage trimming at parallel operation
Fig 6-1: Parallel operation with Remote sensing
FPS1000 #1
FPS1000 #2
FPS1000 #N
FPS1000 #1
FPS1000 #2
FPS1000 #N
15
15
15
15
15
15
CS
CS
CS
CS
CS
CS
10
10
10
10
10
10
SIG.
RTN
SIG.
RTN
SIG.
RTN
SIG.
RTN
SIG.
RTN
SIG.
RTN
OFF
OFF
OFF
OFF
OFF
OFF
ON/
ON/
ON/
ON/
ON/
ON/
V TRIM
V TRIM
V TRIM
7
7
7
7
7
7
+S
+S
+S
+V
+S
+V
+S
+V
+S
-S
-S
-S
-S
-V
-S
-V
-S
-V
+S
+S
-S
-S
+S
-S
V TRIM
+V
-V
+S
-S
16
+V
-V
+S
-S
LOAD
R
R
1
2
R1(K Ω )=20(K Ω )-R2(K Ω Ω)
FPS1000-12:
R2=0.0324*V
R1(K Ω )=5(K Ω )-R2(K Ω )
FPS1000-24:
R2=0.0785*V
R1(K Ω )=20(K Ω )-R2(K Ω )
FPS1000-32:
R2=0.0463*V
FPS1000-48:
R2=0.0497*V
R1(K Ω )=50(K Ω )-R2(K Ω )
2
2
2
2
out
out
out
out
-7.2795*V
-1.1298*V
-5.819*V
-4.5805*V
out
out
out
out
+105.132
+259.04
+9.9342
+109.49