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

Page 272

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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