Interface Board Status Lights During Normal Power-Up - Hypertherm Command THC Instruction Manual

MAINTENANCE

Interface board status lights during normal power-up

The following LEDs and test points are located on the interface board. See Figure 5-8.
LED Signal function
D1 Power
D2 Shield Relay
D5 Plasma Start
D6 Ohmic Contact
Test Points TP1 (ground) and TP2 (+) allow the measurement of the isolated electrode-to-work voltage divided by 82.
HT4400 and HPR installation
Note: Instructions to install the plasma interface PCB into the
HT4400 power supply are included in section 3h.
Instructions to install the plasma interface PCB into the
HPR power supply are included in
section 3i.
The plasma interface enclosure is not used for the
HT4400.
5-16
11
Status
On
Normally On – Off when arc initiates.
On when plasma start signal to the power supply is active.
Normally Off – On when torch is in contact with the plate.
Figure 5-8 Interface board
CommandTHC for X-Y Table Instruction Manual