Rockwell Automation Allen-Bradley 1794-IB16D - 1794-IA8 120 V AC 8 Input Module; 1794-IA8 I 120 V AC 8 Input Module

112 Rockwell Automation Publication 1794-UM061B-EN-P - March 2020
Appendix B Simplified Schematics of FLEX I/O Digital Modules
1794-IA8 120V AC 8 Input Module
1794-IA8I 120V AC 8 Input Module
Typical Simplified Schematic for Input 0
and a 1794-TB2, 1794-TB3, 1794-TB3S, or (1794-TBN) Terminal Base
Flexbus
Interface
Input
Filter
Opto
Isolation
C-34
A-1 (C-1)
A-0 (B-0)
B-16
Input
Device
L1
85…132V AC
Common L2
30231
40945
Flexbus
Interface
Input
Filter
Opto
Isolation
A-0
A-1
Input
Device
85…132V AC
Typical Simplified Schematic for Input 0
and a 1794-TB3, 1794-TB3S, 1794-TB2, or (1794-TBN) Terminal Base
(B-0)
(C-1)
L1
Common L2
Note: To maintain isolation, separate AC sources must be used
with each channel. Auxiliary terminal strips are required for all
terminal base units.