Assembly and Installation
Chapter 3
312
Figure 3.10
Ground Connections at Enclosure Wall
Scrape paint
on both sides
Ground lug
Nut
Star washer
Equipment
Grounding
Conductor
Enclosure Wall (Outside)
Star washer
Bolt
10020
Enclosure Wall (Inside)
Switch Group Assembly
Located near the lower left side of the I/O Chassis are numbered switches in a
Switch Group Assembly (Figure 3.11). Switch 1 must be set ON or OFF to
determine output response to a fault. A fault can be considered any malfunction
that is detected by the Controller, which causes the operation to shut down. The
two switch settings indicate the following (Figure 3.12):
ON - Outputs are left in their last state, either energized or de-energized,
when a fault is detected.
OFF - Outputs are de-energized when a fault is detected.
Use the tip of a ballpoint pen to set Switch 1. Do not use a pencil because the
tip may break off and jam the switch.
NOTE: Switch 1 does not determine output behavior if AC line power fails or
if the Processor is placed in the TEST, PROGRAM, REMOTE TEST or
REMOTE PROGRAM modes. In these cases, outputs are turned OFF.
Switches 2-8 are not used for the Mini-PLC-2/15 Controller and can have any
setting.
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