Lincoln Electric IM10163 FLEX FEED 74 HT - Manual (Page 37)

A-30
INSTALLATION FLEX FEED™ 74 HT
RELAY CONNECTIONS
The Flex Feed ™ 74 HT includes a DPDT relay for
switching power for accessories. The relay closes
whenever the gas solenoid turns on.
The ratings of the relay are:
Normally Open 30 amps @ 277 VAC 20 amp @ 28 VDC
Normally Closed 2 amps @ 480 VAC 3 amps @ 28 VDC
To make connections to the relay:
1. Turn power OFF at the welding power supply.
2. Remove the (4) screws securing the roof with a
5/16” nut driver.
3. Remove the (4) screw securing the User Interface
with a 5/16” nut driver.
4. Remove the plastic plug button at the rear of the
feeder and replace with an appropriate electrical
bushing. Route the wires through the bushing to the
relay.
5. Reassemble.
FIGURE A.44
NORMALLY CLOSED
CONTACTS
NORMALLY OPENED
CONTACTS
24
3 7
8
6