Campbell Scientific AM16/32B Relay Multiplexer - Manual (Page 38)

AM16/32B Relay Analog Multiplexer
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0
"4 X 16" Mode
COM H (ODD)
COM L
COM H (EVEN)
COM L
ODD H
ODD L
EVEN H
EVEN L
SHIELD SENSOR SHIELDS COM
CR23X/
CR800/
CR850/
CR1000
21X/
CR7 CR10(X)
CR3000/
CR5000
EX E E VX
H H H H
L L L L
AG
H H H H
L L L L
G
FIGURE
The CR5000 and CR3000 also have current excitation channels which allow a
the excitation current is known, it is not
current a
Consider
6-5. Four wire half bridge hookup and measurement
resistance measurement. Because
necessary to measure the voltage across a fixed resistor to determine the
s in FIGURE 6-5. See Section 5.3, General Programming
ations, for an example.
"4 X 16" Mode
COM H (ODD)
COM L
COM H (EVEN)
COM L
ODD H
ODD L
EVEN H
EVEN L
SHIELD SENSOR SHIELDS COM
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0
CR23X/
CR800/
CR850/
CR1000
21X/
CR7 CR10(X)
CR3000/
CR5000
EX E E VX
AG
H H H H
L L L L
6-6. Full bridge measurement
G
FIGURE
6.4 Full Bridge Measurements
Sensor to Multiplexer Wiring — With panel switch set to “4x16” mode,
excitation, ground, and the two signal leads may be connected to one input
SET (FIGURE 6-6).
Multiplexer to Datalogger Wiring — COM terminals are connected to a
datalogger excitation channel, a differential analog input channel, and an
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