Section 3: Installation
Spirit II User’s Manual
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3-22
CNC Machine Interface Connections
Perform the following steps to properly interface the Spirit system with a CNC cutting
machine. See the system schematic for additional information.
Plasma Start Input
The power supply requires a contact closure between P8 pins 3 and 4 to commence the
cutting or marking sequence. The sequence is terminated when the contacts are
opened. The contacts should be rated for 24VDC - 7.3mA.
Plasma Cut/Mark Input
The power supply requires a contact closure between P8 pins 1 and 2 to put the system
in plasma marking mode. Opening the contacts puts the system in cutting mode. The
operating mode should be selected prior to applying a start signal. The contacts should
be rated for 24VDC - 7.3mA.
Arc Hold Input
The power supply requires a contact closure between P8 pins 10 and 11 to inhibit arc
starting even though a plasma start signal has been applied to the unit. When the
contacts are opened, the arc is initiated. This feature is used to decrease cycle time by
allowing pre-cut gas and contact sequencing to occur simultaneously with initial torch
height positioning. The contacts should be rated for 24VDC - 7.3mA.
Motion Output
The power supply provides a maintained contact closure output between P8 pins 12
and 14 as long as an arc is maintained between the torch and the workpiece. The
motion contacts are rated for 24VDC – 10mA.
Remote On/Off Input
The power supply requires a maintained contact closure between P8 pins 5 and 6 to
energize the system from a remote location, provided that the OFF Button on the
plasma console is released. The contacts should be rated for 24VAC – 10mA.
Opening the contacts deenergizes the system. If the remote on/off feature is to be
used, remove the jumper between positions 1 and 2 on the J17 connector on the
microprocessor DSP board.
Power Supply Ready Output
The power supply provides a maintained contact closure output between P8 pins 7 and
8 when the system is ready to cut or mark. The contacts are open during gas purge or
when an error occurs. The contacts are rated for 24VDC – 10mA.
RS-422 Serial Communication Link
An RS-422 serial communication link can be connected between the plug on the rear of
the plasma console and a CNC machine or automatic height control system. All
process parameters can be controlled via the RS-422 communication link. Also, cutting
or marking information such as initial height, cutting or marking height, recommended
arc voltage, and recommended travel speed can be transmitted from the plasma
console to the CNC machine or height control. See Appendix B for additional serial
communication information.
