TOA Electronics FPS-T1U Instruction Manual PARALLEL AND SERIES OPERATION, Parallel operation

FPS-T1U Instruction Manual

CHAPTER 20 PARALLEL AND SERIES OPERATION

20.1 Parallel operation

Up to 3 x FPS-T1U racks with up to 8 x 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 20-1 for output Power derating in parallel operation.

%of rated Power

100

90

			Input voltage
		265
85	100		(Vrms)

Fig 20-1

20.1.1 Parallel operation with Remote sensing

Fig 20-2 shows typical connection of parallel operation with Remote sensing. The CS signal wires should be as short aspossible and with the same length.

J1(A)-10

CS

J1(B)-10

CS

J1(C)-10

CS

FPS-T1U			+V		+S
			+S
FPS-1000 Module A			-S		-S
			-V
					+S
			+V	+S	+V
			+S
FPS-1000 Module B					LOAD
			-S
				-S
			-V		-V
					-S
FPS-1000 Module C
			+V	+S
			+S
ON/	ON/	ON/	-S
OFF_1	OFF_1	OFF_1		-S
A	B	C	-V

J1(A)-3 J1(A)-12 J2(B)-3 J2(B)-12 J3(C)-3 J3(C)-12

Fig 20-2 Parallel operation with Remote sensing

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