PRE-INSTALLATION
2-6
Hardware and Installation User Manual
Bypass the programmable control system with an external JOG or
INCH switch during machine loading or setup operations. See
Figure 2-3.
Output
Module
User-supplied
critical loads
which could
cause injury
Outputs from the
programmable controller
Jog
Switch or contact
open in the JOG
or INCH mode
Switch or contact
closed in the jog
or inch mode
Figure 2-3
JOG or INCH Switch
2.3
ENCLOSURE SELECTION
As a minimum, an enclosure for a PLC should provide the following:
Easy access to components
A common ground potential on the cabinet
A secure vertical panel or rails
Conformance to electrical standards
An electromagnetic shield
Access restricted to authorized personnel only
Protection from dust, dirt and moisture in an industrial environment
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