Rockwell-automation 1771-IFE/C INSTL.INSTRUCTIONS ANALOG INPU Manual de usuario Pagina 8

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Analog Input Module8
Publication
17715.45 - July 1997
Source Ground
-
Unused channels must have their + and
 inputs jumpered together and tied to
module common to reduce noise.
1771WG
Field Wiring Arm
Attention: Analog input signals must be within +
14.25V referenced
to module common. If an input channel exceeds this range,
channeltochannel crosstalk can cause invalid input readings and
invalid underrange or overrange bits.
NOTE:
The 1771IFE module does not supply loop power for the input device.
The user must supply loop power for looppowered input devices.
+
Channel
1+
Channel 1
Channel 2+
Channel 2
Channel 3+
Channel 3
Channel 4+
Channel 4
Channel 5+
Channel 5
Channel 6+
Channel 6
Channel 7+
Channel 7
Channel 8+
Channel 8
Module Common
Not used
Not used
Not used
Module Common
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Configuring
the module for dif
ferential inputs does not provide isolation.
-T
ie power supply grounds together to
minimize ground loops.
Note:
Refer to transmitter manufacturers
specifications for power supply connections.
+
Power
Supply
2Wire
Transmitter
Power
Supply
2Wire
Transmitter
The sensor cable must be shielded. The shield must:
extend the length of the cable, but be connected only at the 1771 I/O chassis
extend up to the point of termination
Important:
The shield should extend to the termination point, exposing just enough cable to
adequately terminate the inner conductors. Use heat shrink or another suitable
insulation where the wire exits the cable jacket.
Connection
Diagram for 8 Differential Inputs and T
woW
ire T
ransmitters
Source Ground
-
Unused channels must have their + and
 inputs jumpered together and tied to
module common to reduce noise.
1771WG
Field Wiring Arm
Attention: Analog input signals must be within +
14.25V referenced
to module common. If an input channel exceeds this range,
channeltochannel crosstalk can cause invalid input readings and
invalid underrange or overrange bits.
NOTE:
The 1771IFE module does not supply loop power for the input device.
The user must supply loop power for looppowered input devices.
+
Channel
1+
Channel 1
Channel 2+
Channel 2
Channel 3+
Channel 3
Channel 4+
Channel 4
Channel 5+
Channel 5
Channel 6+
Channel 6
Channel 7+
Channel 7
Channel 8+
Channel 8
Module Common
Not used
Not used
Not used
Module Common
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Configuring
the module for dif
ferential inputs does not provide isolation.
-T
ie power supply grounds together to
minimize ground loops.
Note:
Refer to transmitter manufacturers
specifications for power supply connections.
+
The sensor cable must be shielded. The shield must:
extend the length of the cable, but be connected only at the 1771 I/O chassis
extend up to the point of termination
Important:
The shield should extend to the termination point, exposing just enough cable to
adequately terminate the inner conductors. Use heat shrink or another suitable
insulation where the wire exits the cable jacket.
Power
Supply
4Wire
Transmitter
Power
Supply
4Wire
Transmitter
Connection
Diagram for 8 Differential Inputs and FourW
ire T
ransmitters
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