TOA Electronics FPS-S1U, FPS1000-24, FPS1000-12, FPS-T1U Output Voltag Trimming, Grounding outputs

19.3 Output Voltag Trimming

Fig 19-4 shows typical output voltage trimming connection for FPS1000 unit ‘A’ inside the rack Units ‘B’ and ‘C’ connections - Refer to 17.7.5

FPS-T1U

+S

J1(A) J1(A)-8

FPS1000-12:

R2=0.0324*V2out -1.1298*Vout+9.9342

FPS1000 Module A

V_TRIM

-S

J1(A)-6

J1(A)-7

R1

R2

R1(KΩ)=5(KΩ)-R2(KΩ)

FPS1000-24:

R2=0.0785*V2out -5.819*Vout+105.132 R1(KΩ)=20(KΩ)-R2(KΩ)

FPS-1000 Module B

FPS-1000 Module C

R1&R2:0.5W

J2(B)

J3(C)

FPS1000-32:

R2=0.0463*V2out -4.5805*Vout+109.49 R1(KΩ)=20(KΩ)-R2(KΩΩ)

FPS1000-48:

R2=0.0497*V2out-7.2795*Vout+259.04 R1(KΩ)=50(KΩ)-R2(KΩ)

Fig 19-4 Output Voltag Trimming

19.4 Supervisory Signals

Signals are accessible at the J1(A), J2(B), J3(C) connectors on the rear panel of the rack Fig 19-5 shows typical connection for FPS1000 unit ‘A’. inside the rack

Units ‘B’ and ‘C’. connections - Refer to 17.7.5

FPS-T1U

FPS1000	12V AUX
Module A	AC_FAIL_A
	DC_OK_A
	TEMP.ALARM_A
	SIGNAL RET

FPS-1000 Module B

FPS-1000 Module C

J1(A)
9
11	10K	10K	Application
5			Monitoring
14	10K		and Control

3circuits

J2(B)

J3(C)

Fig 19-5 Supervisory Signals

Note: AC_FAIL, DC_OK and TEMP.ALARM are open collector signals

19.5 Grounding outputs

Either the positive or negative output terminals can be grounded. To avoid noise problems caused by common-mode current flowing from the load to ground, it is recommended to ground the output terminal as close as possible to the power supply's output. Always use two wires to connect the load to the power supply regardless of how the system is grounded.

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