Thermal Arc 250S DC CC, Operating Manual

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24
Socket Pin Function
1 Earth (Ground)
2
Torch Switch Input (24V) to energize weld current.
(connect pins 2 & 3 to turn on welding current)
3 Torch Switch Input (0V) to energize weld current
(connect pins 2 & 3 to turn on welding current)
4
Connect pin 4 to pin 8 to instruct machine that a remote current control device
is 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)
3 Positive Terminal
Welding current flows from the Power Source via heavy duty Dinse type terminal. It is
essential, however, that the male plug is inserted and turned securely to achieve a sound
electrical connection.
4 Negative Terminal
Welding current flows from the Power Source via heavy duty Dinse type terminal. It is
essential, however, that the male plug is inserted and turned securely to achieve a sound
electrical connection.
CAUTION 2
Loose welding terminal connections can cause overheating and result in the male plug
being fused in the bayonet terminal.
5 ON/OFF Switch
This switch connects the Primary supply voltage to the inverter when in the ON position.
This enables the Power Supply.
WARNING 6
When the welder is connected to the Primary supply voltage, the internal electrical
components maybe at primary potential with respect to earth.
6 Input Cable
The input cable connects the Primary supply voltage to the equipment.
SMART Logic Switch (Not Shown)
Manual slide switch mounted on the back panel selects for proper input voltage. If this slide
is not set to the position that matches the input voltage from the electrical source the Smart
Logic circuit will inhibit welding power source output. The digital meter will show primary
input error code.