Nelson NS20A - Maintenance Instructions; Part Number Designation

NS20A & NS20N Heavy Duty Gun Page 10 Revision 1.20 2/19/08
MAINTENANCE INSTRUCTIONS
Part Number Designation
The Nelson Heavy Duty handgun has been designed for use with various Nelson Stud Welding Systems. The
basic construction of the gun remains the same - only the control cable and trigger switch assembly change for
proper interconnection with the control unit. The correct gun number may be determined per the following
table:
Heavy Duty
Gun Part
Number
751-535-000 751-535-100 751-535-500 751-693-000
For Use With
Series 6000 (TR-2400)
Series 5000 (TR-1600)
with 4 wire control
Series 3000 (NS-20AHD)
with 3 wire control
Series 6000 (TR-2400)
Series 5000 (TR-1600)
with 2 wire control
Nelweld Power
Sources
with 2 wire Control
Control Cable
Description
6 pin – 4 wire 4 pin – 3 wire 3 Pin 2-Wire 3 Pin 2-Wire
Control Cable
Part Number
721-194-000 721-194-001 721-215-000 721-215-000
Control
Connector
Type
Cannon R & S Hubbell Hubbell
Control
Connector
Part Number
714-083-002 714-061-000 714-174-000 714-174-000
Control
Connector
Boot
N/A N/A 714-174-002 714-174-002
Trigger
Switch
Assembly
709-028-100 709-028-100 709-028-200 709-028-200
Connector
Pin-out
Pin Description
1 No Connection
2 Red (To Red Coil Lead)
3 White (To Trigger)
4 Black (To Trigger)
5 Green (To Green Coil Lead)
6 No Connection
Pin Description
X No Connection
Y Green (To Green Coil Lead)
Z Black (To Trigger)
Small
Pin
White (To Trigger)
Pin Description
Silver White
Brass Black
Center No Connection
Pin Description
Silver White
Brass Black
Center No Connection