FPSS1U TDK Corporation, FPSS1U Datasheet - Page 37

• 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 13 PARALLEL AND SERIES OPERATION
13.1 Parallel operation
Up to 3 FPS-S1U racks with up to 8 FPS1000 installed units of the same output voltage rating can be connected
in parallel. The built-in Oring diodes on the main output and on the +12V auxiliary voltage in each FPS1000 unit
allow N+1 operation. By connecting the CS signal between the paralleled units, automatic current balance is achieved,
with +/-10% accuracy. For input voltages less than 100Vac, maximum output Power derated by 10% of the Power
rating. Refer to Fig 13-1 for output Power derating in parallel operation.
Fig 13-1: Output Power derating at parallel operation
13.1.1 Parallel operation with Remote sensing
Fig13-2 shows typical connection of parallel operation with Remote sensing. The CS signal wires should be as short
aspossible and with the same length.
Fig 13-2: Parallel operation with Remote sensing
% of rated Power
100
90
9
9
9
CS
CS
FPS-S1U #1
FPS-S1U #2
FPS-S1U #3
CS
11
11
11
SIG.
RTN
SIG.
RTN
85
SIG.
RTN
OFF
OFF
5 15 25
5 15 25
ON/
OFF
5 15 25
ON/
ON/
A
A
A
OFF
OFF
ON/
OFF
ON/
ON/
B
B
B
100
OFF
OFF
ON/
ON/
OFF
ON/
C
C
C
+V
+S
+V
+S
+V
+S
-S
-V
-S
-V
-S
-V
+S
+S
-S
-S
+S
-S
+S
-S
265
+V
-V
34
LOAD
Input voltage
(Vrms)