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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
R2=0.0324*V out -1.1298*V out +9.9342
R2=0.0785*V out -5.819*V out +105.132
FPS-T1U
FPS1000
Module A
+S
V_TRIM
-S
J1(A)
J1(A)-8
J1(A)-6
J1(A)-7
R1
R2
FPS1000-12:
2
R1(K Ω )=5(K Ω )-R2(K Ω )
FPS1000-24:
2
R1(K Ω )=20(K Ω )-R2(K Ω )
R2=0.0463*V out -4.5805*V out +109.49
R2=0.0497*V out -7.2795*V out +259.04
FPS-1000 Module B
FPS-1000 Module C
J2(B)
J3(C)
R1&R2:0.5W
FPS1000-32:
2
R1(K Ω )=20(K Ω )-R2(K ΩΩ )
FPS1000-48:
2
R1(K Ω )=50(K Ω )-R2(K Ω )
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
J1(A)
9
FPS1000
Module A
12V AUX
AC_FAIL_A
DC_OK_A
TEMP.ALARM_A
11
5
14
10K
10K
10K
Application
Monitoring
and Control
SIGNAL RET
FPS-1000 Module B
FPS-1000 Module C
3
J2(B)
J3(C)
circuits
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.
48
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