Rockwell Automation 1769-ASCII Compact I/O ASCII Module - Manual (Page 17)

Rockwell Automation Publication 1769-UM012B-EN-P - January 2014 17
Compact I/O ASCII Module Chapter 1
Replace a Module
The module can be replaced while the system is mounted to a panel or DIN rail.
1. Remove power.
2. Remove the upper and lower mounting screws from the module to be
removed (or open the DIN latches with a screwdriver).
3. Move the bus lever to the right to disconnect (unlock) the bus.
4. Move the bus lever on the right-side adjacent module 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, verify that the module is disconnected from
the bus and mounting screws are removed (or DIN latches opened).
If needed, rock the module slightly from front to back to remove it, or, in a
panel-mounted system, to loosen the screws of adjacent modules.
6. Before installing the replacement module, verify that the bus lever on the
replacement module and the right-side adjacent module are unlocked
(fully right) position.
7. Slide the replacement module into the open slot.
8. Connect the modules together by locking (fully left) the bus levers on the
replacement module and the right-side adjacent module.
9. Replace the mounting screws (or snap the module onto the DIN rail).
Ground the Module This product is intended to be mounted to a well-grounded mounting surface
such as a metal panel. Additional grounding connections from the module’s
mounting tabs or DIN rail (if used) are not required unless the mounting surface
cannot be grounded. See Industrial Automation Wiring and Grounding
Guidelines, publication
1770-4.1 , for additional information.
ATTENTION: Remove power before removing or inserting this module. When
you remove or insert a module with power applied, an electrical arc can 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. Worn contacts can create electrical resistance.