Automation Connection (Lx Models); Typical Application - Miller Maxstar 300 LX Owner's Manual

4-9. Automation Connection (LX Models)

F F E E
D
G
J J
C C
H
I
B B
A
A - Closure to D starts the weld cycle. Opening closure stops weld cycle. Durning 2T operation, a momentary closure (greater than 100 ms, but
less than 3/4 seconds) starts and stops weld output.
B - Closure to D turns on gas. This input will override Postflow, but if a Preflow time is entered, the Preflow cycle will time out before arc initia-
tion.
C - Closure to D must be maintained at all times. If the closure between pins C and D is broken, an output disable occurs, Postflow begins to
time out, and HELP 13 will be displayed on the meters.
Outputs are isolated open-collector transistors.
Final Slope - output is on when in Final Slope.
Pulse Lockout - output is on when in Initial Amperage, Initial Slope, Final Slope, Final Amperage, and when the pulse frequency is less than 10
Hz.
Arc On - output is on when the contactor is on and there is less than 50 load volts.

4-10. Typical Application

Typical 10-Pin Output
Collector
Emitter
Socket
A Start/Stop
B Gas
C Output Disable
D Chassis ground
E Final slope − collector
F Final slope − emitter
G Pulse lockout − collector
H Pulse lockout − emitter
ST-802 137-A ST-802 137-A
I Valid arc − collector
J Valid arc − emitter
Definitions Of Inputs And Outputs
Inputs
Outputs
Coil resistance plus R
should be choosen to
CR1
limit current to 75 mA
R
Socket Information For 10-Pin Receptacle RC2
CR1
+
User supplied power
up to 27 volts DC peak
−
To User Equipment
OM-2222 Page 19