Table of Contents
Advertisement
5-6.
Automation Connection (For 28-Pin Receptacle If Present)
A. Basic Automation Mode
Use this mode when only the basic functions of the automation board are required. These functions include Start/Stop, Valid Arc Indication, Gas Con-
trol, High Frequency Arc Start Disable, and Remote Memory Select. The welding power source functions as a standard unit. Automation 2 mode should
be used when an externally controlled pulse waveform is needed, or if the welder's amperage is affected by noise injected into the cabling between
the remote equipment and the welder.
3
8
7
14
13
12 11
19
18
20
24 23
25
27
28
Signal
Pin
Direction
1
Input
Start/Stop = Maintained connection to pin 8 starts the weld cycle. Opening connection stops weld cycle. For
momentary closure operation, set unit to 2T. A momentary closure greater than 100 ms, but less than 3/4 of a second
starts and stops weld output.
3
Input
Gas Control = This input is used to control the gas flow outside the settings of the preflow and/or postflow set on the
machine. Connection to pin 8 turns on gas.
4
Output
Valid Arc Indication = Paired with Pin 9. This output is used to signal external fixtures that the machine has detected a
valid arc. Pin is closed to pin 9 when the output is on and there is less than 65 load volts. Electrical specifications: Open
collector transistor maximum values 27 volts DC peak @ 75mA. (See Section 5-5 for typical application).
5
Output
Scaled Actual Welding Voltage = +1 volt DC per 10 volts of output w/reference to pin 11.
6
Output
Scaled Actual Welding Amperage = +1 volt DC per 100 amperes of output w/reference to pin 11.
7
Output
+15volts DC with respect to pin 11 (Pin A of 14 pin)
8
Output
Reference PIN = This pin is the signal reference for pins 1, 2, 3, 10, 15, 16
9
Output
Valid Arc Indication Reference = Paired with Pin 4. Connect to user's external voltage supply common. (See Section
5-5 for typical application).
10
Input
Memory Select = Used to select between memory numbers. Used in conjunction with pin 15 and 16. (See Sections 5-7
and 14-1.)
11
Output
Amperage Control Reference = for pins 5, 6, 7, 17 and 18. (Pin D of 14 pin)
12
Output
Welders Chassis = Earth ground. Connected only if common potentials are needed between user equipment and the
welder.
13
Output
Arc Length Control Lockout = Paired with Pin 14. Used to send signal to an automatic voltage control to ignore the
voltage during certain situations. Pin is closed to pin 14 when weld cycle is in Initial Amperage, Initial Slope, Final Slope,
Final Amperage, and Pulsed Background time. Electrical specifications: Open collector transistor maximum values 27
volts DC peak @ 75mA. (See Section 5-5 for typical application).
14
Output
Arc Length Control Lockout Reference = Paired with Pin 13. Connect to user's external voltage supply common (See
Section 4-17 for typical application).
15
Input
Memory Select = Used to select between memory numbers. Used in conjunction with pins 10 and 16. (See Sections 5-7
and 14-1.)
16
Input
Memory Select = Used to select between memory numbers. Used in conjunction with pins 10 and 15. (See Sections
5-7 and 14-1.)
17
Input
Amperage Control = 0 to +10 volts DC with respect to pin 11. The 10 volts represents the amperage value set on ma-
chines meter. (Pin E of 14 pin)
Continued on next page
OM-275857 Page 22
.
A complete Parts List is available at www.MillerWelds.com
2
1
6
5
4
9
10
17
15
16
22
21
26
Pin Information For 28-Pin Receptacle RC28
804746-B / 218716-A
Advertisement
Table of Contents
Troubleshooting
