Manual
Publication 1756-UM009C-EN-P - December 2010 289
Analog I/O Module Specifications Appendix A
1756-IF8
ControlLogix voltage/current analog input module
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
i
i
1756-IF8 Differential Current
A
A
Shield
Ground
Channel 0
Channel 3
Jumper
Wires
2-wire
Transmitter
IN-0
IN-1
IN-2
IN-3
IN-7
RTN
IN-4
IN-5
IN-6
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
i RTN-0
i RTN-1
i RTN-2
i RTN-3
i RTN-7
RTN
i RTN-4
i RTN-5
i RTN-6
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
12
34
56
78
910
1112
1314
1516
1718
1920
2122
2324
2526
2728
2930
3132
3334
3536
+
–
+
–
1756-IF8 Differential Voltage
Shield Ground
Channel 0
Channel 3
IN-0
IN-1
IN-2
IN-3
IN-7
RTN
IN-4
IN-5
IN-6
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
i RTN-0
i RTN-1
i RTN-2
i RTN-3
i RTN-7
RTN
i RTN-4
i RTN-5
i RTN-6
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Shield Ground
· Use this table when wiring your module in differential
current mode.
· All terminals marked RTN are connected internally.
· A 249 Ω current loop resistor is located between IN-x and
iRTN-x terminals.
· If multiple (+) or multiple (-) terminals are tied together, connect
that tie point to a RTN terminal to maintain the module’s
accuracy.
· Place additional loop devices (such as strip chart recorders) at
the A location in the current loop.
· Do not connect more than two wires to any single terminal.
IMPORTANT: When operating in two-channel, High-speed mode, only
use channels 0 and 2.
Table 1.A
This channel Uses these terminals
Channel 0 IN-0 (+), IN-1 (-), i RTN-0
Channel 1 IN-2 (+), IN-3 (-), i RTN-2
Channel 2 IN-4 (+), IN-5 (-), i RTN-4
Channel 3 IN-6 (+), IN-7 (-), i RTN-6
· Use this table when wiring your module in differential
voltage mode.
· All terminals marked RTN are connected internally.
· If multiple (+) or multiple (-) terminals are tied together, connect
that tie point to a RTN terminal to maintain the module’s
accuracy.
· Terminals marked RTN or i RTN are not used for differential
voltage wiring.
· Do not connect more than two wires to any single terminal.
IMPORTANT: When operating in two-channel, High-speed mode, only
use channels 0 and 2.
Table 1.B
This channel Uses these terminals
Channel 0 IN-0 (+), IN-1 (-)
Channel 1 IN-2 (+), IN-3 (-)
Channel 2 IN-4 (+), IN-5 (-)
Channel 3 IN-6 (+), IN-7 (-)
User-provided
Loop Power