Rockwell Automation Publication 1794-IN102D-EN-P - July 2018 9
FLEX I/O AC Digital Input Modules
For 1794-TBN – Connect the associated 120V AC power lead (L1) of
the input device to the corresponding odd-numbered terminal on the
34...51 row (C) for each input as indicated in the Wiring Connections
for 1794-IA8 table. (The 120V AC power terminals of row (C) are
internally connected together.)
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.
Wiring Connections for 1794-IA8
1794-TB2, 1794-TB3, 1794-TB3S 1794-TBN
Input Input Terminal 120V AC Supply Input Terminal 120V AC Supply
Input 0 A-0 A-1
(1)
/C-35
(1) A-1, 3, 5, 7, 9, 11, 13, and 15 on the 1794-TB2, 1794-TB3, and 1794-TB3S are internally connected in the module to 120V AC L1.
B-0 C-1
(2)
(2) C-1, 3, 5, 7, 9, 11, 13, and 15 on the 1794-TBN are internally connected in the module to 120V AC L1.
Input 1 A-2 A-3
(1)
/C-36 B-2 C-3
(2)
Input 2 A-4 A-5
(1)
/C-37 B-4 C-5
(2)
Input 3 A-6 A-7
(1)
/C-38 B-6 C-7
(2)
Input 4 A-8 A-9
(1)
/C-39 B-8 C-9
(2)
Input 5 A-10 A-11
(1)
/C-40 B-10 C-11
(2)
Input 6 A-12 A-13
(1)
/C-41 B-12 C-13
(2)
Input 7 A-14 A-15
(1)
/C-42 B-14 C-15
(2)
A = Input terminals (Even-numbered terminals 0...14)
B = Common terminals
C = Power terminals (C-34 and C-51 on 1794-TB2; C-34 to C-
51 on 1794-TB3 and 1794-TB3S)
B = Even-numbered input terminals 0...14,
AC common terminals 16 and 33
C = Power terminals C-34 and C-51, and
odd-numbered input terminals 1...15
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