AB Quality ALLEN-BRADLEY 1791 User Manual page 25

Figure 2.7
Wiring Connections for the 120V ac Analog Block with Current Input and
Customer Supplied Loop Power
RIO
Output
-
User Analog
Output Device
+
Figure 2.8
Wiring Connections for the 24V dc Analog Block with Current Input and
Customer Supplied Loop Power
RIO
Output
-
User Analog
Output Device
+
1
L1
L1
GND
N
NOT
USED
NOT
USED
Current Input
BLU
+
SHD
CLR
in V0
RET
User Analog
in0
in I0
Input Device
GND
in0
in V1
-
RET
in1
in I1
GND
in1
in V2
RET
in2
in I2
GND
User +24V
in2
in V3
RET
ATTENTION: The 249 ohm
in3
in I3
GND input current shunt is rated
in3
+24
at 0.25 Watts. Do not
RET Vdc
exceed this rating.
out0
out0
RET
out1
out1
NOT
USED
30
+
1
+24V dc
Supply
+24
GND
RET
+24
NOT
USED
NOT
USED
Current Input
BLU
+
SHD
CLR
in V0
RET
User Analog
in0
in I0
Input Device
GND
in0
in V1
-
RET
in1
in I1
GND
in1
in V2
RET
in2
in I2
GND
User +24V
in2
in V3
RET
ATTENTION: The 249 ohm
in3
in I3
input current shunt is rated
GND
in3
+24
at 0.25 Watts. Do not
RET Vdc
exceed this rating.
out0
out0
RET
out1
out1
NOT
USED
30
Chapter 2
Installing Block I/O
L2/N
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.
User GND
-
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.
User GND
2-7