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Standalone MMC Hardware Manual
Installation, Operation, & Maintenance
version 15.1
Danaher Motion
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
Danaher Motion 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.
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.
Figure 3-5: Recommended EMC Compliant Connections
Inside a control cabinet, connect the shields of shielded cables at the MMC.
below illustrates shielded cable entering/leaving the cabinet.
MMC
COMMUNICATIONS
ENCODER, ANALOG
DC INPUT/OUTPUT
24V
COM
AC INPUT
POWER
GND
SINGLE-POINT GROUND
SINGLE-POINT GROUND
DC POWER SUPPLY
+
Power
Connector
Capacitor
(.001 uf)
Summary of Contents for Standalone MMC
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