48v dc f an – Rockwell Automation 20Y PowerFlex 700H, 700S, and 700AFE Drive Fan Systems, Frames 9...14 User Manual
Page 272

272
Rockwell Automation Publication PFLEX-IN029B-EN-P - August 2014
Appendix A
PowerFlex 700H and 700S Diagnostic Procedures
Figure 40 - DC Fan System Block Diagram
DC F
an P
o
w
er Supply Cir
cuit Boar
d
ASIC
Cir
cuit
Boar
d
(X11)
X8
of
Nex
t
Fa
n
X8
X3
X2
1 - DC+
3 - DC-
1 - F
an PWM
2 - Iso +18V
3 - F
an C
ontr
ol
4 - F
an Alarm F
r9
5 - DC- Ref
6 - F
an Alarm F
r8
7 - F
an Alarm F
r10
OPT
O
OPT
O
OPT
O
1 - Nex
t F
an PWM
2 - Iso +18V*
3 - Nex
t F
an C
o
ntr
o
l
4 - Nex
t F
an Alarm*
dc/dc C
on
ver
ter
Fault Det
ec
t
Driv
er
X81 Blue
X81 Red
DC+
DC-
Isolation
PWM C
o
nt
oller
DC-
+18V
If
dbk
Temp
OPT
O
+
_
X81 Y
ello
w
X81 Whit
e
Rotat
e
48V DC F
an
Vf
dbk
Co
n
tro
l
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