Rockwell Automation Publication 1794-IN102D-EN-P - July 2018 11
FLEX I/O AC Digital Input Modules
the 34...51 row (C) as indicated in the Terminal Base Wiring for 1794-
IA16 table.
2. For 1794-TB3 or 1794-TB3S – Connect the associated 120V AC
power lead (L1) of the input device to the corresponding terminals on
the 34...51 row (C) for each input as indicated in the Te r m i n a l B a s e
Wiring for 1794-IA16 table. (The 120V power terminals of row (C) are
internally connected together.)
For 1794-TBN – An external terminal strip is needed to distribute
120V AC power (L1) to each device.
3. Connect 120V AC power (L1)to terminal 34 on the 34...51 row (C).
4. Connect 120V AC common (L2) to terminal 16 on the 16...33 row (B).
5. If daisychaining power to the next terminal base, connect a jumper from
terminal 51 (+120V AC L1) on this base unit to terminal 34 on the next
base unit.
6. If continuing AC common to the next base unit, connect a jumper from
terminal 33 (120V common L2) on this base unit to terminal 16 on the
next base unit.
Terminal Base Wiring for 1794-IA16
Input
Input Terminal
1794-TB3, 1794-TB3S
Input Terminal
1794-TBN
120V AC Supply (L1)
(1)
Input 0 A-0 B-0 C-35
Input 1 A-1 C-1 C-36
Input 2 A-2 B-2 C-37
Input 3 A-3 C-3 C-38
Input 4 A-4 B-4 C-39
Input 5 A-5 C-5 C-40
Input 6 A-6 B-6 C-41
Input 7 A-7 C-7 C-42
Input 8 A-8 B-8 C-43
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