Hypertherm THC ArcGlide - Manual (Page 114)

114 ArcGlide THC Instruction Manual 806450
2 – Installation
Pierce: This is an optional output from the THC and input to HPR supplies. This signal informs the plasma system that
the unit is piercing and the plasma system should maintain the high shield gas preflow during the pierce. This
signal is used to improve the piercing capability of HPR plasma systems only.
Hold: This is an optional output from the THC and input to the plasma system. For a single torch installation, this signal is
optional but recommended. The CNC should activate this signal to delay plasma torch ignition until all active
torches in a multiple torch configuration have completed their IHS sequence and are in position and ready to
fire. At this point, all active torches will return an active IHS Complete signal to the CNC and the CNC
should remove all Hold Ignition input signals and allow all active plasma torches to ignite simultaneously. This
signal can also be used to save cycle time by performing gas preflow during the IHS sequence.
Start: This output from the THC is used to start the plasma system. This signal is a maintained signal. The plasma system
will continue to power the plasma cutting torch until this signal is removed. When the Start signal is removed
the plasma system begins to ramp down and turn off the torch power.
Spare output: This is an extra output for future use.
Remote On: This is an optional output signal from the ArcGlide THC that can be used to turn ON or OFF capable
plasma systems. On capable systems, such as the HPR plasma systems, deactivating this signal will remove
the high power input to the plasma system and will turn off the gas and torch cooling pump. See
Hypernet
plasma interface board (141162) on page 228 for more information.
1/50th Arc Voltage: This analog input to the THC provides the arc voltage feedback used for automatic height control.
The signal is scaled so that 5 VDC equals an arc voltage of 250 VDC. The positive side of this voltage
should be connected to chassis ground. To provide high accuracy, this voltage should have an effective
output resistance of 2 KΩ or less.