FLEX I/O AC Digital Output Modules 9
Publication 1794-IN103D-EN-P - July 2018
5. Press firmly and evenly to seat the module in the terminal base unit. The module
is seated when the latching mechanism (2) is locked into the module.
Connecting Wiring for the 1794-OA8 or 1794-OA8K
1. For 1794-TB2, 1794-TB3, or 1794-TB3S – Connect individual output wiring
to even numbered terminals on the 0…15 row (A) as indicated in the Wiring
Connections for 1794-OA8 and 1794-OA8K table.
2. For 1794-TBN or 1794-TBNF – Connect individual output wiring to even
numbered terminals on the 16…33 row (B) as indicated in the Wiring
Connections for 1794-OA8 and 1794-OA8K table.
3. For 1794-TB2, 1794-TB3, or 1794-TB3S – Connect the associated V AC
common (L2) lead of the output device to the corresponding odd numbered
terminal on the 0…15 row (A) for each output as indicated in the Wiring
Connections for 1794-OA8 and 1794-OA8K table; or to the corresponding
terminal on the 16…33 row (B). The V AC common (L2) terminals of row (B)
and the odd numbered terminals of row (A) are internally connected together.
For 1794-TBN or 1794-TBNF – Connect the associated V AC common (L2)
lead of the output device to the corresponding odd numbered terminal on the
34…51 row (C) for each output as indicated in the Wiring Connections for
1794-OA8 and 1794-OA8K table. The odd numbered terminals of row (C) are
internally connected together to V AC L2 common.
4. Connect V AC power L1 to terminal 34 on the 34…51 row (C).
5. Connect V AC common L2 to terminal 16 on the 16…33 row (B).
6. If daisychaining V AC power (L1) to the next terminal base, connect a jumper
from terminal 51 (V AC L1) on this base unit to terminal 34 on the next base
unit.
7. If continuing V AC common (L2) to the next base unit, connect a jumper from
terminal 33 (V common L2) on this base unit to terminal 16 on the next base
unit
.
Total current draw through terminal base connection is limited to 10 A.
Separate power connections to each terminal base may be necessary.
ATTENTION: If multiple power sources are used for 1794-OA8I, do not exceed
the specified isolation voltage.
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