Hypertherm HD3070 Plasma Arc Cutting System w/ Automatic Gas Console - Manual (Page 183)

5-58 HD3070 with Automatic Gas Console Instruction Manual
16
MAINTENANCE
Relay Board LED Status Indicators
Power Supply
The power supply relay board (1XPCB4) is an interface between solenoid valves, relays, the main contactor, and
the control board (1XPCB3). An ON or OFF condition is sent from the control board through REC1 at the bottom of
the relay board, which switches 1 of the relays on 1XPCB4 to on or off. The corresponding solenoid or external
device is then energized or deenergized (output is sent via REC3 or REC4 at the top of the relay board). Figure 5-4
shows the relay locations on 1XPCB4 as well as the light emitting diode indicators (LEDs). Figure 5-5 shows the
relay board LED on/off status during system test and run modes.
Listed below are the pin assignments for REC3 and REC4 of relay board 1XPCB4:
REC3 Pin # Description
1 & 2 HV Transformer (T1 in Remote HF Console)
3 & 4 Pilot Arc Relay CR1
5 & 6 Main Contactor CON1
7 & 8 Surge Relay CR4
9 & 10 Extra Output
11 & 12 Torch Ignition CRD
13 & 14 Blowout Counter
15 & 16 120 VAC (Input)
REC 4 Pin # Description
1 & 2 O
2
& N
2
Select
3 & 4 H35 & N
2
Select
5 & 6 Air & N
2
Select
7 & 8 Message Number
9 & 10 Shield Operate Valve
11 & 12 Shield Preflow Valve
13 & 14 Not used
15 & 16 Plasma On/Off Valve