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5. PARALLEL OPERATION
5.1. Remote sensing and current balance
Two FPS3000 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.
FPS3000 #1
SIG.
CS
RTN
9
11
FPS3000 #2
SIG.
CS
RTN
9
11
6. SERIES OPERATION
Up to 2 units of the same voltage and current rating can be used for increased output voltage
It is recommended that diodes be connected in parallel with each unit output to prevent revese voltage.
Each diode should be rated to at least the power supply rated output voltage and output current.
Series operation is not applicable for units with I2C bus option.
FPS3000 #1
ON/
SIG.
OFF
RTN
A
11
5 15 25
FPS3000 #2
ON/
SIG.
OFF
RTN
A
11
5 15 25
+V
+S
-S
ON/
ON/
ON/
OFF
OFF
OFF
-V
A
B
C
5 15 25
+V
+S
ON/
ON/
ON/
-S
OFF
OFF
OFF
-V
A
B
C
5 15 25
+S
+V
ON/
ON/
-V
OFF
OFF
-S
B
C
+S
+V
ON/
ON/
-V
OFF
OFF
-S
B
C
(*) Diodes are user supplied
+S
-S
+S
+V
-V
-S
+S
-S
+S
(*)
+V
-V
(*)
-S
LOAD
Fig 5-1
LOAD
Fig 6-1
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