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
FPS1000-12:
R2=0.0324*V2out -1.1298*Vout+9.9342
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
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.
