10
FLEX I/O Digital Input and Output Modules w/ Diagnostics
Publication 1794-IN096C-EN-P - August 2015
Connecting Wiring for the 1794-OB16D Module
(using a 1794-TB2, 1794-TB3, or 1794-TB3S Terminal Base)
1. Connect individual output wiring to numbered terminals on the 0-15 row (A) as
indicated in the Wiring Connections for 1794-OB16D table.
2. Connect the associated common for each output to the corresponding terminal
on the 16-33 row (B) as indicated in the Wiring Connections for 1794-OB16D
table. (The common terminals of row (B) are internally connected together.)
3. CV DC power to terminal 34 on the 34-51 row (C). (The power
terminals of row (C) are internally connected together.)
4. Connect DC common (COM) to terminal 16 on the 16-33 row (B).
5. If daisychaining power to the next terminal base, connect a jumper from terminal
51 (+V DC) on this base unit to terminal 34 on the next base unit.
6. If continuing DC common to the next base unit, connect a jumper from terminal
33 (common) on this base unit to terminal 16 on the next base unit.
1794-TB2, 1794-TB3, and 1794-TB3S Terminal Base Wiring for 1794-OB16D
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)
-V (Supply Common) = Terminals B-16 thru B-33
+V (Voltage In) = Terminals C-34 thru C-51
-V
Voltage
In +V
Voltage
Out +V
Voltage
A
B
C
(Use B-33 and C-51 for daisy-chaining to next terminal base unit)
Common
-V
Common
Terminals 35 thru 50 not available on 1794-TB2
