OM-275857 Page 26
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Complete Parts List is available at www.MillerWelds.com
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 the
weld cycle is in Initial Amperage, Initial Slope, Final Slope, Final Amperage,
and Pulsed Background time. Electrical specifications: Open collector transis-
tor maximum values 27volts DC peak @ 75mA. See Section 5-5 .
14
Output
Arc Length Control Lock-
out Reference
Paired with Pin 13. Connect to user’s external voltage supply common. See
Section 5-5 .
15
Input
Memory Select
Used to select between memory numbers. Used in conjunction with pin 10
and 16. See Sections 5-7 and 10.
16
Input
Memory Select
Used to select between memory numbers. Used in conjunction with pin 10
and 15. See Sections 5-7 and 10.
17
Input
Amperage Control
0 to +10 volts DC with respect to pin 11. The 10 volts represents the amper-
age value set on machines meter (Pin E of 14 pin).
18
Output
+10 Volts DC
With respect to pin 11 for use with an external potentiometer to vary the signal
into pin 17 (Pin C of 14 pin).
19
Input
High Frequency Arc Start
Disable
Disables the arc starter from being activated when connected to pin 8.
20
Input
Welder Control Select
Connect to pin 8 to activate this mode.
23
Output
Final Slope Sequence
Indication
Paired with Pin 24. Pin is closed to pin 24 when in Final Slope. Electrical
specifications: Open collector transistor maximum values 27 volts DC peak @
75mA. See Section 5-5 .
24
Output
Final Slope Sequence Indi-
cation Reference
Paired with pin 23. Connect to user’s external voltage supply common. See
Section 5-5 .
All other pins not used.
C. User Controlled Automation Mode (Pin 25 Connected To Pin 8) Automation 2
This mode includes all the basic functions of the automation board, plus gives the welder the option to control the pulse or AC waveforms, or to
minimize the noise that can be injected into the welder from the control and cables. These functions include Start/Stop, Valid Arc Indication, Gas
Control, High Frequency Arc Start Disable, and Emergency weld stop.
A complete Parts List is available at www.MillerWelds.com
A. User Controlled Automation Mode (Pin 25 Connected To Pin 8) Automation 2
804746-B / 21816-A
1
4
9
15
21
26
28
25
20
14
8
3
2
7
6
5
13
12
11
10
19
18
17
16
24 23
22
27
2-5.
Remote Memory Select Inputs (For 28-Pin Receptacle If Present)
1
4
9
15
21
26
28
25
20
14
8
3
Pin
Signal
Direction
Description
Pin Information For 28–Pin Receptacle RC28
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 momen-
tary closure greater than 100 ms, but less than 3/4 of a second starts and
stops weld output.
2
Input
Emergency Weld Stop
Used to remotely stop the weld outside the normal welding cycle (i.e. light cur-
tains or external E-Stop). Connection to pin 8 must be maintained at all times.
If the connection is broken, output stops, Postflow begins, and will be dis-
played on the meters.
Summary of Contents for Dynasty 400
Page 78: ...OM 275857 Page 68 275852 H Figure 12 2 Dynasty 400 Circuit Diagram Page 2 of 2...
Page 80: ...OM 275857 Page 70 Figure 12 4 Maxstar 400 Circuit Diagram Page 2 of 2...
Page 81: ...OM 275857 Page 71 275854 G Figure 12 5 Dynasty 800 Circuit Diagram Page 1 of 2...
Page 82: ...OM 275857 Page 72 275854 G Figure 12 6 Dynasty 800 Circuit Diagram Page 2 of 2...
Page 83: ...OM 275857 Page 73 Figure 12 7 Maxstar 800 Circuit Diagram Page 1 of 2...
