Tweco Merlin 6000 Plasma Cutting CE Slave Power Supply - Manual (Page 40)

APPENDIX A-6 Manual 0-2603
APPENDIX 5-B: LADDER DIAGRAM - 15 vdc
(Rev AF or Later Logic Control PC Board)
3
LOGIC CONTROL BOARD
19
9
24
11
18
8
22
12
K2
SWITCH
RECOGNITION
START/STOP (CNC)
D8
START
INDICATOR
PWM
CONTROL
W
CONTACTOR
D9
J3-9
PWM
ENABLE
PWM DISABLE
(Only after main con-
tactor initially closes)
SENSE BRIDGE
VOLTAGE
<60VDC
TP1
TP4
To disable
this circuit for troubleshooting
short test points together.
HF AND PILOT
CONTACTOR
CSR Indicator
D10
15 VDC SUPPLY
2 1
28 VAC
CENTER TAP
TORCH VOLTAGE/23
CSR (from Current
Control Board)
TS3 TS1 TS2
ALL PC BOARD INPUTS
ACTIVE LOW EXCEPT
J1-24 AND J1-21.
21 22
OVER-CURRENT SHUTDOWN
(From Switching Control)
REFERENCES J1 CONNECTOR REFERENCES J3 CONNECTOR
A-03296
D7
RUN
TS4 TS5
PWM-ON
CONTACTOR
OFF DELAY