G&L MMC-A2, Hardware Manual

Page: 23 / 192

Installation, Operation, & Maintenance
G & L Motion Control Inc. MMC Hardware Manual 15
supplied via the MMC in this example. If the drive has its own
external 24 VDC supply, the +24 V line would not be connected.
Figure 3-4: Example of 24 VDC Power Distribution to an MMC System
The DC power source is connected to the MMC system through a
3-pin connector. It plugs into the power connector of the MMC.
The ground from the power source and ground from the MMC must
be connected to the Single-Point Ground (SPG).
Devices connected to the hardware may have their own power
sources for input data or output control signals. You can use other
wiring setups, provided that each one is:
• at the correct voltage and current levels for the module and
the device.
• connected to the same Single-Point Ground that the MMC
uses.
MAIN
DISCONNECT
AC
PLANT GROUND
+24V
COM
MMC
Analog
+24V
COM Motor
Power
L1
L2
GND
EXTERNAL
24VDC
POWER SUPPLY
+
SINGLE POINT
GROUND (SPG)
GROUND from another
CONTROL CABINET
CHASSIS
GROUND
Interfaced
MMC-SD Drive