OWNER’S MANUAL
© 1996 MILLER Electric Mfg. Co.
April 1996 FORM: OM-181 408A
Effective With Serial No. KG152485
ATC-24
1. Specifications
115 To 24 Volts AC Power Supply Adapter
For Connecting GMAW Wire Feeder To Welding Power Source
24 Volts AC, 8 Amperes Output; Nominal 110 Volts AC Input Power
Overload Protection; 14
-
Socket Wire Feeder Receptacle
Overload Protection; 14
-
Socket Wire Feeder Receptacle
ST-801 589
Includes 17-Pin Plug With 6 ft (1.8 m) Interconnecting Cord
2. Safety Symbol Definitions
Means Warning! Watch Out! There are possible hazards
with this procedure! The possible hazards are shown in
the adjoining symbols.
Have only trained and qualified persons install, operate,
or service this unit. Call your distributor if you do not un-
derstand the directions. For WELDING SAFETY and
EMF information, read wire feeder and welding power
source manuals.
Beware of electric shock from welding electrode or wiring.
Touching the electrode while in contact with the work or
ground can cause electric shock. Always wear dry
gloves. Keep all panels and covers closed.
Wear safety glasses with side shields.
3. Connections And Circuit Breaker CB1
ST-801 589
1 115 Volts AC/Remote Contac-
tor 17-Pin Plug
Use to make 115 volts ac/remote
contactor connections to welding
power source (see Section 5 for pin
data).
2 Remote 14 Receptacle
Use to make 24 volts ac input pow-
er connections to wire feeder (see
Section 4 for pin data).
3 Circuit Breaker CB1
CB1 protects adapter from damage
due to overload.
If CB1 opens, the wire feeder does
not work. Reset breaker.
1
2
3
OM-181 408 Page 2
4. Remote 14 Receptacle Information
Pin* Pin Information
A 24 volts ac with respect to socket G.
AJ
B Contact closure to A completes 24 volts ac contactor control circuit.
AJ
B
K
I
C Reference; +10 volts.
C
L
NH
D
M
G
D Remote control circuit common.
D
M
G
E
F
E Wiper; 0 to 10 volts dc.
E
G Circuit common for 24 volts ac circuit.
*The remaining pins are not used.
5. 17-Pin Plug Information
17-Pin Plug
Pin* Pin Information
B System ground (0 volt).
C Pref (0−15 volts).
B
M
A
D Weld level (+15 volts).
B
M
C
N
L
P
T
A
E Contactor start/stop.
C
N
L
D
RS
K
E
J
P
T
H 115 volts ac.
E
G
J
F
H
J 115 volts ac return.
N Reference inhibit.
P Start/start inhibit.
*The remaining pins are not used.
6. Installation Onto Wire Feeder
Ref. ST-143 460-B
Y Disconnect power before
installing.
1 Adapter
2 Wire Feeder
3 Spool Support
Install adapter into spool support
using existing hardware.
3/8 in
3
1
2
OM-181 408 Page 3
7. Moving Jumper Plug To Match Wire Feeder To Welding Power Source
ST-801 594
Y Turn off welding power
source and wire feeder. Un-
plug unit from feeder and
power source.
The ATC-24 is factory set to use a
standard PD22, PD22P12, or PD60
wire feeder with an older model
400SM or 630SMP with a 17-pin re-
ceptacle. If a remote voltage control
option is used on the wire feeder or
if a 400SMT with a 17-pin recep-
tacle is used, then move the jumper
plug as follows:
Remove wrapper from unit.
Find connector and the three free-
hanging jumper plugs in the wiring
harness.
For 17-pin Model 400SM or
630SMP used with a PD22,
PD22P12, or PD60 with optional re-
mote voltage control:
1 Disconnect jumper plug
labeled “400SM w/front panel
control” from the receptacle.
2 Connect jumper plug labeled
“400SM w/remote control” to
receptacle.
3 Reinstall wrapper.
For 17-pin Model 400SMT used
with a PD22, PD22P12, or PD60
with or without optional remote
voltage control:
1 Disconnect jumper plug la-
beled “400SM w/front panel
control” from the receptacle.
2 Connect jumper plug labeled
“400SMT” to receptacle.
3 Reinstall wrapper.
Resume operation. For use with
competitive welding power
sources, call PowCon Technical
Service.
1
2
3
4
5
6
7
8
73
84
6
5
2
1
3 7
4 8
2
1
6
5
RC2A
RC2B
RC2C
400 SM
W/FRONT
PANEL CONTROL
400 SMT
CONTROL
W/REMOTE
400 SM
8. Troubleshooting
Trouble Remedy
No weld output. Be sure welding power source Power switch is On.
Check cord connections or replace cords, if necessary.
Reset circuit breaker CB1 (see Section 3).
Check welding gun and/or wire feeder.
Check position of jumper plug (see Section 7).
OM-181 408 Page 4
SB-181 419
Figure 8-1. Circuit Diagram
9. Parts List
12
ST-801 591
3
4
5
6
7
8
9
10
11
12
13
14
Part
No.
Item
No.
Description (Qty)
1 +143 283 Wrapper (1).
2 131 515 Label, warning (1). . . . .
3 Nameplate (1). . . . . . . . . . . . .
4 011 244 Circuit Breaker, 2A 240VAC (1). . . . .
5 143 278 Insulator (1). . . . .
6 143 485 Transformer (1). . . . .
7 136 190 Nut, 10-32 (4). . . . .
8 143 281 Enclosure (1). . . . .
9 006 393 Relay, 24VAC DPDT (1). . . . .
10 143 976 Connector w/Sockets (1). . . .
11 010 325 Bushing, .840 ID x .875mtg hole (1). . . .
12 600 797 Cable, 16 8/c (order by ft) (7ft). . . .
13 116 964 Connector, str rlf sz 20-22 (1). . . .
14 181 431 Connector, circ 17pin (1). . . .
113 751 Connector, 8skt plug (1). . . . . . . .
127 961 Connector, skt 16ga (3). . . . . . . .
079 534 Connector, skt 14-18ga (3). . . . . . . .
+When ordering a component originally displaying a
precautionary label, the label should also be ordered.
BE SURE TO PROVIDE MODEL AND SERIAL NUMBER
WHEN ORDERING REPLACEMENT PARTS.
Figure 9-1. Complete Assembly
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