Rockwell Automation Publication 1794-IN102D-EN-P - July 2018
13
FLEX I/O AC Digital Input Modules
2.
For 1794-TB2, 1794-TB3, or 1794-TB3S
– Connect the associated
120V AC common (L2) of the isolated supply to the corresponding
odd-numbered terminals on the 0...15 row A for each input as indicated
in the Wiring Connections for 1794-IA8I table.
For 1794-TBN
– Connect the associated 120V AC common lead (L2)
of the isolated supply to the corresponding odd-numbered terminal
1...15 on the 34...51 row (C) as indicated in the Wiring Connections for
1794-IA8I table.
IMPORTANT
Individual isolated 120V AC L1 power leads must be run externally to
each of the input devices.
Wiring Connections for 1794-IA8I
1794-TB2, 1794-TB3, 1794-TB3S
1794-TBN
Input
Input Terminal
120V AC L2
Common
Input Terminal
120V AC L2
Common
Input 0
A-0
A-1
B-0
C-1
Input 1
A-2
A-3
B-2
C-3
Input 2
A-4
A-5
B-4
C-5
Input 3
A-6
A-7
B-6
C-7
Input 4
A-8
A-9
B-8
C-9
Input 5
A-10
A-11
B-10
C-11
Input 6
A-12
A-13
B-12
C-13
Input 7
A-14
A-15
B-14
C-15
A = Even-numbered terminals 0...14 for customer
connections; corresponding odd-numbered 120V AC
common L2 terminals 1...15 for customer connections from
isolated power supply.
B = Even-numbered terminals 0...14 for
customer connections;
C = Odd-numbered 120V AC common L2
terminals 1...15 for customer connections
from isolated power supply.