
1-12
+24VDC Power Connections for Series 16i/18i/21i CNCs and
Power Mate i Motion Controllers
Note
This information applies only to the Series 16i/18i and 21i CNCs and
Power Mate i Motion Controllers. It does not apply to the Series 15i
CNC. For information on the Series 15i CNC, please refer to Page 1-16.
The Series 16i/18i and 21i CNCs and Power Mate i Motion Controllers do not contain built-in power
supplies. They must be powered by an external +24VDC power supply.
Most machine tools use an external +24VDC power supply for machine I/O devices. To save space and
reduce electrical hardware, the same power supply could be sized to include the CNC hardware
requirements. In other applications, it may be desirable to provide a separate +24VDC power supply to the
CNC-related hardware. The separate +24VDC power supply would be isolated from the +24VDC power
supply used for machine I/O devices.
CAUTION
Regardless of the method used to supply power, proper device mounting and
grounding, good wiring practices, and recognized methods of noise
suppression must always be observed. Failure to do so could result in
incorrect operation or machine failures.
The North American Operator Panel for i Series CNCs contains built-in hardware to provide for switching
the external +24VDC power supply. This will simplify installation for the machine tool builder. The
switched +24VDC output is controlled by the Control ON and OFF pushbuttons provided on the Operator
Panel. The switched +24VDC power supply should be used for all GE Fanuc devices required to be turned
on in synchronization with the CNC control. This includes I/O Model A racks, I/O Link Connection Units,
and Separate Feedback Detectors. Connector PL1 on OPND1 (the circuit board behind the pushbutton
assembly) provides screw clamp terminal block type connections for the incoming +24VDC power supply,
and +24VDC @ 8 Amps Maximum switched output (see 44C742964).
When used with the Series 16i/18i/21i controls, the Operator Panel may be ordered with Cable Kit
44C742962-G01. All cables in the kit are fully assembled. This kit contains the following items:
Table 1-7. Cable Kit 44C742962-G01
Item Description
44C742962-006 +24VDC power supply to OPND1 Connector PL-1 for incoming +24VDC.
44C742962-005 Switched +24VDC from OPND1 PL-1 to the Connection Unit.
44C742974-001 Connection Unit to CNC or LCD Unit.