Hypertherm HT4001 Plasma Arc Cutting System - Manual (Page 151)

MAINTENANCE
6-98
HT4001
Instruction Manual 6-25
Note: In all Relay Board Figures, LED ON = LED OFF =
Figure 6-5 Relay Board PCB4 in O
2
Test Preflow
RHF Inj. Wtr
(SV6 in RHF Csl) Plasma OFF
(SV5 near torch) Preflow
(SV2/SV3 in Gas Csl) Plasma Preflow
(SV4B in MV Csl) O2 Cutflow
(SV1A in Gas Csl)
+ 12 VDC
Output
Enable
Relay Board LED Status
Test Preflow Mode – O
2
Figure 6-6 Relay Board PCB4 in N
2
Test Preflow
RHF Inj. Wtr
(SV6 in RHF Csl) Plasma OFF
(SV5 near torch) Preflow
(SV2/SV3 in Gas Csl.)
+ 12 VDC
Output
Enable
Plasma N
2
/O
2
(SV1B in Gas Csl)
Plasma Preflow
(SV4B in MV Csl)
Relay Board LED Status
Test Preflow Mode – N
2