User manual

Weld Control Selector Guide - Page 28

CONTACTOR OUTPUT CONFIGURATION

Contactor Selection

There are two types of contactor signals that various power supply manufacturers use. A "Closing Contact

or Contactor" and a “115VAC Contactor” signal. Once the power supply contactor is closed, the welding

leads become electrically live and are referred to as being “live” or “hot”.

For the Closing Contactor type, the weld control simply touches the two contactor leads together (providing

a continuity signal to the power supply) like a light switch. ALL Cobramatic wire feeders and Weld Controls

are shipped in this conguration (Figure A). Since no voltage is applied to the leads in tis conguration, it

is safe to handle and there is no risk of personal injury from electrocution.

Figure A

For the 115VAC Contactor type, the weld control must send 115VAC into the power supply to close the

contactor. In order to obtain this conguration from a Cobramatic wire feeder or Weld Control, the internal

wiring or each must be modied as shown (Figure B).

Figure B

If a 115VAC signal is required, remove the four screws from both sides of control box, and remove

cover. For Cobramatic open left door. Locate white and black wire on #3 and #4 of terminal strip J6.

Move white wire to #3 and black wire to #4 of terminal strip J5. The unit will now supply 115VAC on

the black (hot) and white (neutral) wires.

WARNING: Disconnect the WC-1 & Cobramatic from all power sources before changing contactor.

WHITE

BLACK

CLOSING

CONTACTS

CONNECTION

COBRAMATIC / WC-1

MAIN BOARD

1 43

115 VAC