Miller Millermatic 350P Technical Manual page 43

23
Current
Transformer
CT1
T1 Primary
Current
Feedback
Current Feedback
Ribbon Cable
RS485
Cable
16
Wire Feed
Motor M1
17
Tach/Pulse
Board PC6
RS485
Cable
18
Optical Tach
Board PC7
Millermatic 350
24
Main
Transformer
T1
26
Stabilizer
Z1
28
Negative (−)
Weld Output
Receptacle
Work
Voltage Feedback
Voltage Feedback
22
Spool Gun
Receptacle
RC2
19 20
User Filter Board
Interface PC9
Board PC3

25
Output
Diodes
D1, D2
27
Hall
Device
HD1
28
Positive (+)
Weld Output
Receptacle
Electrode
21
MIG Gun
Receptacle
RC1
AC Or DC Control Circuits
 
1 Or 3 Power
Weld Current Circuit
Optional
16 Wire Feed Motor M1
Feeds wire at speed set by Control
board PC1.
17 Tach/Pulse Board PC6
Provides speed signal to wire feed
motor and feedback signal to User
Interface board PC3.
18 Optical Tach PC7
Measures wire feed motor speed
and provides feedback signal to
Tach/Pulse board PC6.
19 User Interface Board PC3
Sets process parameters for welding
applications.
20 Filter Board PC9
Filters input signals from receptacles
RC1 and RC2 to User Interface
board PC3.
21 MIG Gun Receptacle RC1
Connects gun trigger circuit to weld
power source.
22 Spool Gun Receptacle RC2
Connects spool gun motor, trigger,
wire feed speed control circuits, and
push-pull guns to welding power
source.
23 Current Transformer CT1
Provides current feedback to PC1
from the primary of T1 for control cir-
cuit timing and to limit primary cur-
rent.
24 Main Transformer T1
Energized by on/off switching action
of PM1 and PM2, and supplies pow-
er to weld output circuit.
25 Output Diodes D1, D2
Rectify output of T1.
26 Stabilizer Z1
Smooths out welding current.
27 Hall Device HD1
Provides weld or secondary current
feedback signal to PC1.
28 Positive (+) And Negative (−)
Weld Output Receptacles
Provide weld output and allow
changing of output polarity.
TM-1327 Page 39