G&L MMC-A2, Hardware Manual

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CE and EMC Guidelines
164 MMC Hardware Manual G & L Motion Control Inc.
11.8 Using CE/EMC and Non-CE/EMC Modules
There are several issues that must be considered when using CE/EMC
compliant and Non-CE/EMC compliant Modules. This document addresses
these issues.
Module Identification
-
To determine whether a module is CE/EMC or Non-
CE/EMC, look at the gray Unit Tag located on the side of the plastic module
case. CE/EMC modules will have “CE” or “EMC” printed near the “MAX.
AMBIENT TEMP.” specification. Non-CE/EMC will not have “CE” or
“EMC” printed in this location.
Grounding - Due to differences in shielding requirements, it is extremely
important to follow proper shielding guidelines for a given module. Failure
to do so may result in intermittent operation in noisy environments.
For modules that have an SPG terminal and/or one or more SHIELD
terminal, perform the following:
•
For CE/EMC modules, do not connect the SPG terminal or SHIELD termi-
nals to the system’s Single Point Ground
•
For Non-CE/EMC modules, connect the SPG terminal, or a SHIELD ter-
minal, to the system’s Single Point Ground
CE/EMC CSM and RSM Modules
-
Using a CE/EMC CSM, RSM, or
CSM/CPU (PiC90) with certain Non-CE/EMC analog modules may cause
intermittent operation. Follow these guidelines for determining the type of
CSM, RSM, or CSM/CPU that should be used in a particular rack:
•
If your rack contains one or more Non-CE/EMC modules that perform D/A
conversion or provide an Encoder interface, you must use a non-CE/EMC
CSM, RSM, or CSM/CPU (PiC90).
IMPORTANT
Failure to follow these guidelines may result in undesired system
performance.
NOTE
CE indicates compliance to both the EMC and low voltage directives.
EMC indicates compliance to the EMC directive.