Rockwell Automation 1794-OB8EPXT, 1794-IB16XT, 1794-OB16PXT, 1794-IB10XOB6XT FLEX XT I/O Digital DC Input/Output Modules User Manual
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Publication 1794-IN124A-EN-P - January 2009
1794-TB2, -TB3 and -TB3S Terminal Base Wiring for 1794-OB8EPXT and
1794-OB16PXT
1794-TBN Terminal Base Wiring for the 1794-OB8EPXT
1794-TB3 and -TB3S Terminal Base Wiring for 1794-IB16XT
Wiring Connections for the 1794-OB16PXT (use with 1794-TB2, -TB3, or
-TB3S Terminal Base Units)
Output
Output Terminal
Common Terminal
Output 0
A-0
B-17
Output 1
A-1
B-18
Output 2
A-2
B-19
Output 3
A-3
B-20
Output 4
A-4
B-21
Output 5
A-5
B-22
Output 6
A-6
B-23
Output 7
A-7
B-24
Output 8
A-8
B-25
Output 9
A-9
B-26
Output 10
A-10
B-27
Output 11
A-11
B-28
Output 12
A-12
B-29
Output 13
A-13
B-30
Output 14
A-14
B-31
Output 15
A-15
B-32
+V dc
C-34 thru C-51 (C-34 and C-51 for 1794-TB2)
Common
B-16 thru B-33
Wiring Connections for the 1794-OB8EPXT
Output
1794-TB2, -TB3, TB3S
1794-TBN
Output
Terminal
Common
Terminal
(1)
(1)
1794-TB2, -TB3, -TB3S - A-1, A-3, A-5, A-7, A-9, A-11, A-13 and A-15 are connected together
inside the module to 24V DC common.
Output
Terminal
Common
Terminal
(2)
(2)
1794-TBN - C-1, C-3, C-5, C-7, C-9, C-11, C-13 and C-15 are connected together inside the module
to 24V DC common.
Output 0
A-0
A-1/B-17
B-0
C-1
Output 1
A-2
A-3/B-18
B-2
C-3
Output 2
A-4
A-5/B-19
B-4
C-5
Output 3
A-6
A-7/B-20
B-6
C-7
Output 4
A-8
A-9/B-21
B-8
C-9
Output 5
A-10
A-11/B-22
B-10
C-11
Output 6
A-12
A-13/B-23
B-12
C-13
Output 7
A-14
A-15/B-24
B-14
C-15
+V dc
C-34 thru C-51 (C-34 and C-51 for 1794-TB2, -TBN)
Common
B-16 thru B-33 (B-16 and B-33 for 1794-TBN)
Wiring Connections for 1794-IB16XT (use with 1794-TB3 or -TB3S Terminal
Base Units)
Input
Input Terminal
Voltage Terminal
Common Terminal
(1)
(1)
3-wire devices use input, supply and common; 2-wire devices use input and supply
Input 0
A-0
C-35
B-17
Input 1
A-1
C-36
B-18
Input 2
A-2
C-37
B-19
Input 3
A-3
C-38
B-20
Input 4
A-4
C-39
B-21
Input 5
A-5
C-40
B-22
Input 6
A-6
C-41
B-23
Input 7
A-7
C-42
B-24
Input 8
A-8
C-43
B-25
Input 9
A-9
C-44
B-26
Input 10
A-10
C-45
B-27
Input 11
A-11
C-46
B-28
Input 12
A-12
C-47
B-29
Input 13
A-13
C-48
B-30
Input 14
A-14
C-49
B-31
Input 15
A-15
C-50
B-32
+V dc
C-34 thru C-51
Common
B-16 thru B-33
Wiring Connections for the 1794-IB10XOB6XT
Input
(1)
(1)
Two wire input devices use signal and supply terminals. Three wire devices use signal,
return and supply terminals.
Signal
Return
Supply
Sink Input
Input 0
A-0
B-17
C-35
Input 1
A-1
B-18
C-36
Input 2
A-2
B-19
C-37
Input 3
A-3
B-20
C-38
Input 4
A-4
B-21
C-39
Input 5
A-5
B-22
C-40
Input 6
A-6
B-23
C-41
Input 7
A-7
B-24
C-42
Input 8
A-8
B-25
C-43
Input 9
A-9
B-26
C-44
Source Output
Output 0
A-10
B-27
Output 1
A-11
B-28
Output 2
A-12
B-29
Output 3
A-13
B-30
Output 4
A-14
B-31
Output 5
A-15
B-32
+V dc
C-34 thru C-51 (internally connected together)
Common
B-16 thru B-33 (internally connected together)
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
16
35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
34
Outputs
Commons
(1794-TB3 shown)
Connect -V (Supply Common) to terminal B-16
Connect +V (Supply +Voltage) to terminal C-34
-V
Voltage
In +V
Voltage
Out +V
Voltage
Terminals 35 thru 50 not available on 1794-TB2
A
B
C
Common
-V
Common
(Use B-33 and C-51 for daisy-chaining to next terminal base unit.)
Total current draw through the terminal base is limited to 10A. Separate power
connections to each terminal base may be necessary.
16
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
51
33
34
+V
COM
+V
COM
B
C
Even Numbered I/O Terminals 0 thru 14
Odd Numbered I/O Terminals 1 thru 15
Connect -V (Supply Common) to terminal B-16
Connect +V (Supply +Voltage) to terminal C-34
(Use B-33 and C-51 for daisy-chaining to next terminal base unit.)
Total current draw through the terminal base is limited to 10A. Separate power
connections to each terminal base may be necessary.
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
16
35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
34
Inputs
Commons
(1794-TB3 shown)
Connect V common to terminals B-16
Connect +V to terminal C-34
-V
Voltage
In +V
Voltage
Out +V
Voltage
A
B
C
Common
-V
Common
Use B-33 and C-51 to daisy-chaining to the next terminal base unit