Tweco ArcMaster 401MST - Manual (Page 39)

ARCMASTER 401MST POWER SOURCE
Manual 0-5287 3-9 INSTALLATION, OPERATION AND SETUP
9 Contactor Control
Local Control
Remote Control
Contactor Control either enables the weld output or assigns this function to a remote device. Refer to 3.14
Special Function for more info.
10 Positive Welding 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.
11 Negative Welding 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
Loose welding terminal connections can cause overheating and result in the male plug being fused in
the terminal.
12 Intelligent Fan Control
The intelligent cooling system is designed to reduce dust and foreign material build-up, while providing optimum
cooling. Fan speed reduces approximately 30 seconds after machine is turned on and increases when internal
components reaches operating temperature.
13 14 Pin Remote Control Socket
The 14 pin Remote Control Socket is used to connect Remote Control devices or wire feeders that use a
14 pin connection to the welding Power Source. To make connections, align keyway, insert plug, and rotate
threaded collar fully clockwise.
Pin Function Description
A 24VAC
B Contactor Connect A&B -> contactor enable
C +10VDC Remote Ctrl (Max) 10 VDC for remote potentiometer supply
D Remote Ctrl return/common (Min) Common
E Remote Demand/Wiper Remote control demand signal. Voltage: 0<=Vin<=10V
F Amperage output signal Output current signal. 1Vout/100Aout
G 24/115VAC Common 24/115VAC common and chassis ground
H Output voltage signal Voltage feedback. 1Vout/10Varc
I 115VAC
J Contactor Enable Connect I&J --> contactor enable
K Chassis ground
M Arc established Relay contact between M & N will close while welding is active
N Arc established
Table 3-2 14 Pin Interconnection Control Plug Configuration, 401MST