B block diagram, Appendix b, Block diagram – Rockwell Automation 61C351 2-In/2-Out 4-20 mA Analog Rail Module User Manual
Page 45
BĆ1
Appendix B
Block Diagram
VREF
VREF
SERIAL HOST INTERF
ACE
12 PNT
.
HOST
CONNECTOR
LOCAL HEAD OR RAIL MODE SWIT
CH
GND
COMMUNICATION LED
POWER LED
HOST
INTERF
ACE
CIRCUITRY
ISOLA
TED
CONTROL CIRCUITRY
SERIAL
Ć
PARALLEL REGISTER
PARALLEL
Ć
SERIAL
REGISTER
ISOLA
TED
ANAL
OG
POWER
ANAL
OG
DIGIT
AL
CONVERTER
ISOLA
TED POWER
DU
AL
DIGIT
AL
Ć
ANAL
OG
CONVERTER
D/A CONTROL SIGNALS
D
AT
A BUS
A/D CONTROL
S I G N A L S
D
AT
A BUS
PRECISION VOL
TAGE REF VREF
ISOLA
TED CONTROL SIGNALS
VREF
AMP
VREF
AMP
VREF
O
VER/UNDER
RANGE DETECT
CIRCUITRY
MUX
SAMPLE/
HOLD
FIL
TER
FIL
TER
MAIN
CONTROL CIRCUITRY
RESET
CIRCUITRY
ISOLA
TION
B
OUNDARY
4-20mA OUT
4-20mA OUT
4-20mA INPUT
4-20mA INPUT
D
ĆC+
D
ĆC-
AĆC
AĆC
Vcc
+
-
+
-
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