G&L MMC-A2, Hardware Manual

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Installation, Operation, & Maintenance
G & L Motion Control Inc. MMC Hardware Manual 19
the appendices are included with modules that have replaceable
components.
3.5 System Wiring Guidelines
The MMC relies on electrical signals to report what is going on in the
application and to send commands to it. In addition, signals are constantly
being exchanged within the system. The MMC is designed for use in
industrial environments, but some guidelines should be followed.
3.5.1 Recommended Signal Separation
G&L Motion Control continues to recommend separation of low
level signals (encoder, analog, communications, fast DC inputs)
from high voltage (110 Vac, 220 Vac, 440 Vac, etc.) or high current
lines (such as motor armature cables). Maintain at least one inch of
separation around signals.
Figure 3-5 below illustrates the recommended connections when
using EMC compliant products. Note that a capacitor is connected
to the 24 VDC supply. To prevent excessive conducted emissions
from a DC power source (typically 24 V) used for digital I/O, a
1000 picofarad capacitor should be used. Connect the capacitor
from the +24 VDC to COMMON at the distribution terminals.