Thermal Arc 185 AC, Service Manual

Page: 27 / 122

4-1
ARCMASTER 185 ACDC 200 ACDC
May 22, 2006
SECTION 4:
OPERATOR CONTROLS
4.01 ArcMaster 185/200 ACDC Controls
360
180
15
420
5
4
3
2
1
6
9
8
7
Figure 4-1: ARC MASTER 185/200ACDC Power Source
1. Control Knob: This control sets the selected weld pa-
rameter, rotating it clockwise increases the param-
eter that is indicated on the digital meter. Pushing the
knob inward displays the actual welding voltage.
2. Remote Control Socket: The 8 pin Remote Control
Socket is used to connect remote current control de-
vices to the welding Power Source. To make connec-
tions, align keyway, insert plug, and rotate threaded
collar fully clockwise.
2 1
5 4 3
6 7 8
Front view 8-Socket Receptacle
1 2 3 4 5 6 7 8
5k Ohms
GND
Figure 4-2: 8-Socket Receptacle
Socket
Pin
Function
1 Earth (Ground)
2
Torch Switch Input (24V) to (connect pins 2
& 3 to turn on welding current)
Torch Switch Input (0V) to energize weld
3 current (connect pins 2 & 3 to turn on
welding current)
Connect pin 4 to pin 8 to instruct machine
that a remote current control device is
4
connected (12V DC supply)
5
5k ohm (maximum) connection to 5k ohm
remote control potentiometer
6
Zero ohm (minimum) connection to 5k ohm
remote control potentiometer
7
Wiper arm connection to 5k ohm remote
control potentiometer
8
Connect pin 4 to pin 8 to instruct machine
that a remote current control device is
connected (0V)
Table 4-1: Socket Pin Functions