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Fig 13-3: Output voltage trimming at parallel operation
Fig 13-4: Signal Return connection at parallel operation
13.1.2 Output voltage trimming at parallel operation
The output voltage of the units connected in parallel can be made by a single trimmer or resistive divider.
13.1.3 Signal Return bus at parallel operation
The Signal Return of each paralleled FPS-S1U rack can be connected together to form a common Signal Return
bus. By this way, the control and monitoring signals of the paralleled racks can be connected to the same control
and monitoring circuitry. The Signal Return bus can be connected to the -V or -S or +V or -S or float. Fig 13-4 shows
typical connection of the Signal Return at parallel operation.
+S
-S
+S
-S
+S
-S
V_TRIM
V_TRIM
+S
-S
R1
R2
FPS-S1U # 1
V_TRIM
A, B, C
CS
SIG.
RTN
FPS-S1U # 2
V_TRIM
A, B, C
CS
FPS-S1U # 3
V_TRIM
A, B, C
CS
ABC
V_TRIM
V_TRIM
V_TRIM
FPS-S1U #1
SIG.
RETURN
AC_FAIL
DC_OK
11
11
11
FPS-S1U #1 SIGNALS
FPS-S1U #2 SIGNALS
FPS-S1U #3 SIGNALS
SIGNALS RETURN
OVER-TEMP
ALARM
FPS-S1U #2
SIG.
RETURN
AC_FAIL
DC_OK
OVER-TEMP
ALARM
FPS-S1U #3
SIG.
RETURN
AC_FAIL
DC_OK
OVER-TEMP
ALARM
CONTROL AND
MONITORING CIRCUITS
25155
11
9
119119
9
7
1
10
7
1
10
7
1
10
ON/
OFF
ON/
OFF
ON/
OFF
SIG.
RTN
ABC
25155
ON/
OFF
ON/
OFF
ON/
OFF
11
SIG.
RTN
ABC
25155
ON/
OFF
ON/
OFF
ON/
OFF
FPS-S1U Instruction Manual
FPS-S1U with FPS1000-24 installed:
R2=0.0785*V
2
out -5.819*Vout+105.132
R1(K
Ω)=20(KΩ)-R2(KΩ)
FPS-S1U with FPS1000-48 installed:
R2=0.0497*V
2
out-7.2795*Vout+259.04
R1(K
Ω)=50(KΩ)-R2(KΩ)
FPS-S1U with FPS1000-32 installed:
R2=0.0463*V
2
out -4.5805*Vout+109.49
R1(K
Ω)=20(KΩ)-R2(KΩΩ)
FPS-S1U with FPS1000-12 installed:
R2=0.0324*V
2
out -1.1298*Vout+9.9342
R1(K
Ω)=5(KΩ)-R2(KΩ)
+V
-V