Rockwell Automation 1771-IFE/C INSTL.INSTRUCTIONS ANALOG INPU - Manual (Page 7)

Analog Input Module 7
Publication 1771Ć5.45 - July 1997
- Jumper all unused channels to module
common to reduce noise.
Source Ground
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
Channel 9
Channel 10
Channel 11
Channel 12
Channel 13
Channel 14
Channel 15
Channel 16
Module Common
Module Common
Module Common
Module Common
Module Common
1771ĆWG
Field Wiring
Arm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Attention: Analog input signals must be within +14.25V referenced
to module common. This input signal includes any common mode
voltage present between either input terminal and module common.
If an input terminal exceeds this range, channelĆtoĆchannel
crosstalk can cause invalid input readings and invalid underrange
or overrange bits.
The 1771ĆIFE module does not supply loop power for the input device.
The user must supply loop power for loopĆpowered input devices.
+
–
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
+
_
- Tie power supply grounds together to
minimize ground loops.
Note: Refer to transmitter manufacturers
specifications for power supply connections.
2ĆWire
Transmitter
Power
Supply
NOTE:
- All module commons are electricalĆ
ly tied together inside the module.
2ĆWire
Transmitter
Connection Diagram for 16 SingleĆended Inputs and TwoĆWire Transmitters
- Jumper all unused channels to module
common to reduce noise.
Source Ground
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
Channel 9
Channel 10
Channel 11
Channel 12
Channel 13
Channel 14
Channel 15
Channel 16
Module Common
Module Common
Module Common
Module Common
Module Common
1771ĆWG
Field Wiring
Arm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Attention: Analog input signals must be within +14.25V referenced
to module common. This input signal includes any common mode
voltage present between either input terminal and module common.
If an input terminal exceeds this range, channelĆtoĆchannel
crosstalk can cause invalid input readings and invalid underrange
or overrange bits.
The 1771ĆIFE module does not supply loop power for the input device.
The user must supply loop power for loopĆpowered input devices.
+
–
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.
+
_
- Tie power supply grounds together to
minimize ground loops.
Note: Refer to transmitter manufacturers
specifications for power supply connections.
NOTE:
- All module commons are electricalĆ
ly tied together inside the module.
Power
Supply
4ĆWire
Transmitter
Power
Supply
4ĆWire
Transmitter
Connection Diagram for 16 SingleĆended Inputs and FourĆWire Transmitters