1-1
Features
IM CA500-01EN
1
2
3
4
5
6
7
Index
Chapter 1 Features
1.1 System Configuration and Block Diagram
System Configuration
PC
Field instrument
DC voltage, DC
current, resistance,
TC, RTD, pulse
CA500
USB interface
(communication)
PC
Field instrument
CA550
USB interface
(communication/mass
storage)
USB interface
(HART/BRAIN modem)
HART/BRAIN
communication
RJ sensor (sold separately)
RJ sensor (sold separately)
DC voltage, DC
current, resistance,
TC, RTD, pulse
Block Diagram
CPU
CPU
DC/DC
DC/DC
CPU
+TC-A
H
L
H
L
+LOOP
mA
FUNCTION 2 part
DC/DC
ADC
Power Source/Communication Port
ADC
OUTPUT
DC/DC
Input
circuit
PTC
ADC
Setting
FRQ
OHM
DCV
DCA
-TC-A
Current detection
FUNCTION 1 part
DCV
DCA
TC-A
TC-A
250Ω
OUTPUT
DCA
OHM
FRQ
BATT.
USB B
R.J.
INPUT
Power
source
control
Display
Power AMP
Communication
modem
Constant voltage source
Frequency counter
Shunt resistance
Reference
voltage source
Current voltage
conversion
Excess volatge / excess
current protection