UNITROL Solution 9480 – DC Secondary Control Specifications

WELDING MODESSPOT, SEAM, ROLL-SPOTOperates selected welding mode
COUNTERCounts welds or finished parts0 – 65,500Production control
KEYBOARD KEYLOCKPrevents program changesEliminates unauthorized changes
RETRACTOperates RETRACT solenoidSets large or small electrode opening
DUAL HEATTwo independent weld schedules from the 75 in memoryWelding two thickness combinations in one handling
SQUEEZE TIMEDwell before firing0-99 cyclesFire after electrodes are closed
WELDMain weld heat0-99 cycles
0-99% heat
Main heat for all welding programs
HOLD TIMEDwell after welding0-99 cyclesAllows nugget to cool
SCHEDULE MEMORYInstant recall of complete welding schedules75 complete schedulesInstant setup for welding of common metal combinations
IMPULSATIONRepeats WELD portion of sequence0-99 pulses
0-99 cool cy
Drive a weld deeper into the each part, used on thicker metal welding
PREHEATHeat sequence before weld0-99 cycles
0-99% heat
Controls heat when welding heavy parts
UPSLOPERamps heat from selected starting point to WELD heat0-99 cycles
0-99% initial
Helps with poor fit-up of parts and one method for galvanized steel welding.
DOWNSLOPERamps head from WELD heat percent to selected end heat0-99 cycles
0-99% final
Controlled heat ramp for heavy material welding and controlled cool ramp
POSTHEATHeat sequence after weld0-99 cycles
0-99% heat
Control heat cracking; Smooth transition between impulses
QUENCH & TEMPERCool and reheat at end of welding sequence0-99 cycles
0-99% heat
Reduces brittleness in high carbon steels
REPEATAutomatic opening & closing of tips while initiation is closed0-99 cyclesAllows “automatic” operation of welder on long rows of repetitive welds
WATER SAVER DRIVEROperates water saver solenoid1 minuteTurns water off 1 minute after last weld
TIP FORCECalculate needed pressure0-9,999 lbFast setups for WELD and FORGE
PRECOMPRESSION, POSTCOMPRESSIONTimed high pressure before first heat0-99 cycles ON
0-99 cy delay
Lowers surface resistance at start of weld for consistency
FORGE DELAYTimed delay of high pressure0-99 cyclesReduces nugget internal cracking

UNITROL Solution 9480 – DC Secondary Control Specifications


DIFFERENTIAL PRESSURE TRANSDUCER9381-05Starts weld when program- selected TIP FORCE is reached1-9,999 lb WELD
1-9,999 lb FORGE
Precision TIP FORCE at
beginning of each weld. Verification at end of weld
24VDC OUTPUT9381-30SUPPLY 24VDC FOR VALVESDrives 24VDC solenoid valves on welder
9181-16 (single)
Keypad set of WELD and FORGE forces from program lines0-99 psiEliminates manual pressure regulator setting
WELD CURRENT MONITOR9181-22BWarns each weld if current is out of range. Locks electrodes closed0-250,000AQuality control of every weld
Serial port for data exportRS-232 RS-485Data logging of welding current and tip force


  1. Single or Two-level foot switch operation, single or dual schedule select.
  2. Dual hand switch anti-tiedown, single or dual schedule select.


Contact Weld Systems Integrators

Weld Systems Integrators (WSI) is your complete source for standard and custom resistance welders, consumables, spare and replacement parts and value added services. We offer WORLDWIDE shipping from our Warrensville Heights, OH location.

CONTACT Weld Systems Integrators, or REQUEST A QUOTE on standard IN-STOCK inventory or fully custom welding equipment. To speak with a WSI team member, please give us a call at 844-WSI-WELD or +1-216-475-5629.

Welding Controls  |  UNITROL from Weld Systems Integrators

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