Rockwell Automation 1769-OF4VI Compact I/O Isolated Analog Modules - Manual (Page 24)

Publication 1769-UM014B-EN-P - May 2010
2-8 Installation and Wiring
DIN-rail Mount
The module can be mounted using the following DIN rails:
35 x 7.5 mm (EN 50 022 - 35 x 7.5) or 35 x 15 mm (EN 50 022 - 35 x 15).
Before mounting the module on a DIN rail, close the DIN rail latches. Press
the DIN rail mounting area of the module against the DIN rail. The latches
will momentarily open and lock into place.
Replace a Single Module
Within a System
The module can be replaced while the system is mounted to a panel (or DIN
rail). Follow these steps in order:
1. Remove power.
2. On the module to be removed, remove the upper and lower mounting
screws from the module (or open the DIN latches using a flat-blade or
Phillips screwdriver).
3. Move the bus lever to the right to disconnect (unlock) the bus.
4. On the right-side adjacent module, move its bus lever to the right
(unlock) to disconnect it from the module to be removed.
5. Gently slide the disconnected module forward. If you feel excessive
resistance, check that the module has been disconnected from the bus,
and that both mounting screws have been removed (or DIN latches
opened).
ATTENTION
Remove power before removing or inserting this module.
When you remove or insert a module with power applied,
an electrical arc may occur. An electrical arc can cause
personal injury or property damage by:
 sending an erroneous signal to your system’s field
devices, causing unintended machine motion.
 causing an explosion in a hazardous environment.
Electrical arcing causes excessive wear to contacts on both
the module and its mating connector and may lead to
premature failure.
TIP
It may be necessary to rock the module slightly from front
to back to remove it, or, in a panel-mounted system, to
loosen the screws of adjacent modules.