15 (37)
Kemppi OY
7.4. Cut-off card connection
• The PipeRoot process demands very quick response in the secondary current. This response is delivered by connector
X2
7.5. Analog (current and secondary voltage measurements)
• Primary current is measured by current transformer on the main circuit card
• Current transformer signal is rectified on processor card (V15-V18) and converted to voltage signal by resistors (R118,
R93, R94, R117, R164 and R165). This signal is then divided, filtered, amplified and brought to the fast analog- to digi-
tal converter (N7)
• FPGA reads the measured primary current from A:D-converter data output
• FastMig X measures secondary voltage two different ways; differentially from wire feed unit and direct from power
supply output. Differential voltage signal is brought to power source by connector X010. This connector leads the sig-
nal to processor card connector X11
• The secondary voltage signal is scaled down, filtered and amplified before it goes to A:D-converters inputs
• FPGA reads the secondary voltage measurements from A:D-converters outputs
7.6. Machine size jumpers J1, J2
Power source X 450 has a jumper fitted between connector X9:2, 5
7.7. Primary current limit
• Primary current voltage signal is brought to the over-current comparator (N3). If primary current is too high the over-
current comparator switch off the power source power stage
7.8. Leds
Led Description
H1 State of the microcontroller
H2 State of the microcontroller
H3 State of the microcontroller
H8 FPGA’s configuration
H9 Auxiliary voltages 15 V
H10 Auxiliary voltages 5,3 V
H11 Auxiliary voltages 1,2 V
H12 Auxiliary voltages 5 V
H13 Auxiliary voltages 2,5 V
H14 Auxiliary voltages 3,3 V
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