Miller Electric Legend AEAD-200-LE - Manual (Page 32)

TM-428 Page 28 Miller Legend
6-11. Optional Remote Control Board PC3 Testing Information
Ref. ST-800 698-A / ST-115 941-L / SA-138 247
Be sure plugs are secure before
testing. See Section 6-12 for spe-
cific values during testing.
1 Remote Control Board PC3
2 Receptacle RC1
Test Equipment Needed:
1
2
6-12. Optional Remote Control Board PC3 Test Point Values
PC3 Voltage Readings
a) Tolerance –
±
10% unless
specified
b) Reference – to circuit com-
mon (lead 33) unless noted
Receptacle Pin* Value
RC1 1 (A) Circuit common
2 (B) Circuit common
3 (C) +50 volts dc input at power/idle rpm; 100 volts dc input at weld rpm
4 (D) +12 volts dc input with respect to pin 5 at power/idle or weld rpm
5 (E) Chassis ground (lead 33)
6 (F) 59 to 6.8 volts dc output with respect to pin 1 from min to max of remote control with remote contac-
tor control switch closed, 130 volts dc output with remote contactor control switch open
7 (G) Circuit common
8 (H) Command reference output, +4.5 volts dc output with respect to pin 7
9 (J) 0 volts dc output with remote contactor control switch closed, +15 volts dc output with remote con-
tactor control switch open
10 (K) 0 to +4.5 volts dc input from min to max of Fine Amperage control R1 at power/idle rpm
*Letter(s) in parenthesis ( ) is pin letter prior to Serial No. KA840710.