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FLEX I/O Digital DC Output Modules
Publication 1794-IN094C-EN-P - July 2015
3. Make sure the pins on the bottom of the module are straight so they will align
properly with the connector in the terminal base.
4. Position the module (4) with its alignment bar (5) aligned with the groove (6) on
the terminal base.
5. Press firmly and evenly to seat the module in the terminal base unit. The module
is seated when the latching mechanism (7) is locked into the module.
Connecting Wiring for the 1794-OB8, 1794-OB8EP, 1794-OB16, and
1794-OB16P
1. Connect individual output wiring to numbered terminals on the 0-15 row (A) as
indicated in the table below (1794-OB8 – Terminals 0...7; 1794-OB16 and
1794-OB16P – terminals 0...15; 1794-OB8EP – even numbered terminals
0...14).
2. Connect the associated -V output common to the corresponding terminal on the
16-33 row (B) for each output as indicated in the table below. (Commons are
internally connected together.)
1794-OB8EP
– connect associated output common to odd-numbered terminals
on row A or associated terminals on row (B).
3. CV DC power to terminal 34 on the 34-51 row (C).
4. Connect -V DC common to terminal 16 on the 16-33 row (B).
5. If daisychaining power to the next terminal base, connect a jumper from terminal
51 (+V DC) on this base unit to terminal 34 on the next base unit.
6. If continuing -V DC common to the next base unit, connect a jumper from
terminal 33 (common) on this base unit to terminal 16 on the next base unit.
WARNING:
If you insert or remove the module while backplane power is on,
an electrical arc can occur. This could cause an explosion in hazardous
location installations. Be sure that power is removed or the area is
nonhazardous before proceeding.