Miller Electric S-21E Technical Manual page 25

ceptacle RC2 with respect to circuit common to start the
motor and 0 volts dc should be present when the gun
trigger is released to stop the motor. If +24 volts dc are
not present at pin A when the gun trigger is pressed, re-
place Spot/Burnback Board PC2.
D. Contactor Control Circuit
When the gun trigger is pressed and +19 volts dc are
present at pin D of receptacle RCl with respect to DC
Figure 8-2. Optional SpotlBurnback Board PC2 Component Locations And Information
S-2iE
Spot Time
DIP Switch
Si
circuit common, a contactor control output voltage of
+24 volts dc should be present at pin B of receptacle
RC2 with respect to circuit common. When the gun trig-
ger is released, 0 volts dc should be present at pin B af-
ter a delay of 0 to 0.25 seconds depending on the time
set on Burnback Potentiometer R26. If +24 volts dc are
not present at pin B when the gun trigger is pressed or 0
volts dc are not present when the gun trigger is released,
replace Spot/Burnback Board P02.
SA-125 969-C
TM-1571 Page 21