AB Quality ALLEN-BRADLEY 1791 User Manual page 26

Analog block i/o input/output modules
Table of Contents

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Chapter 2
Installing Block I/O
RIO
Output
User Analog
Output Device
RIO
Output
User Analog
Output Device
2-8
Figure 2.9
Wiring Connections for the 120V ac Analog Block with Current Input and
Block Supplied Loop Power
1
L1
GND
N
NOT
USED
NOT
USED
BLU
SHD
CLR
in V0
RET
in0
in I0
GND
in0
in V1
RET
in1
in I1
GND
in1
in V2
RET
in2
in I2
GND
in2
in V3
RET
in3
in I3
GND
in3
+24
-
RET
Vdc
out0
out0
RET
out1
out1
NOT
+
USED
30
Figure 2.10
Wiring Connections for the 24V dc Analog Block Module with Current
Input and Block Supplied Loop Power
1
+24
GND
RET
+24
NOT
USED
NOT
USED
BLU
SHD
CLR
in V0
RET
in0
in I0
GND
in0
in V1
RET
in1
in I1
GND
in1
in V2
RET
in2
in I2
GND
in2
in V3
RET
in3
in I3
GND
in3
+24
-
RET
Vdc
out0
out0
RET
out1
out1
NOT
+
USED
30
L2/N
L1
Loop Powered
Current Input
i
User Analog
Input Device
i
+24V dc loop power supplied
at terminal 25 on block
ATTENTION: The 249 ohm
input current shunt is rated
at 0.25 Watts. Do not
exceed this rating.
+
-
+24V dc
Supply
Loop Powered
Current Input
i
User Analog
Input Device
i
+24V dc loop power supplied
at terminal 25 on block
ATTENTION: The 249 ohm
input current shunt is rated
at 0.25 Watts. Do not
exceed this rating.
Analog signals must be within the
10V common mode voltage range
which is referenced to the analog
input common (GND). Typically, this
is accomplished by connecting to
user ground. If an input channel
floats outside of this range, invalid
input readings will result.
Analog signals must be within the
10V common mode voltage range
which is referenced to the analog
input common (GND). Typically, this
is accomplished by connecting to
user ground. If an input channel
floats outside of this range, invalid
input readings will result.

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