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Chapter 3
About the FLEX I/O Diagnostic Output Module
30
Wiring Output Loads
You can use the 1794-OB16D diagnostic module with the 1794-TB2, 1794-TB3,
or 1794-TB3S terminal base units.
0
1
2
3
4
5
0
1
2
3
4
5
Output Channel 0-15
16
17
18
19
20
21
22
-V
0
1
2
3
4
5
Common
34
35
36
37
38
39
Voltage
Terminals 35 thru 50 not available on 1794-TB2
In +V
Voltage (24V dc)
User power can be wired to the (+) voltage and common terminals directly, or
power can be daisy chained from the FLEX I/O terminal base units on the DIN
rail. Output channels are not isolated from one another. All 16 channels share a
common return (group isolation from FLEX I/O system-side logic voltages).
Output
Device
24V DC
External User
Power Supply
6
7
8
9
10
11
12
13
6
7
8
9
10
11
12
13
23
24
25
26
27
28
29
6
7
8
9
10
11
12
Common
40
41
42
43
44
45
46
47
(1794-TB3 shown)
FLEX TB2/3/3S
Terminal Base
Output
A0-A15
Common
B17-B32
V+
C34
V-
B16
Rockwell Automation Publication 1794-UM061B-EN-P - March 2020
14
15
A
14
15
30
31
32
33
B
-V
13
14
15
Common
48
49
50
51
C
Voltage
Out +V
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