CHAPTER 4: CONTROLS
MODEL HF2 2 kHz HIGH FREQUENCY RESISTANCE WELDING POWER SUPPLY
4-4
990-057
Sensing Port - Connector Pin Assignments
Pin No.
Wire Color
Description
1
Red
Secondary Weld Current Measurement
2 Red
+12
VDC
3
Red
Secondary Weld Voltage Measurement
4
Red
Weld Transformer Select Line 2 (For MA-600)
5
Red
Weld Transformer Thermo Switch
6
Red
Weld Transformer Select Line 4 (For MA-600)
7
Red
Digital Signal Ground
8
Black
230 VAC Weld Transformer Fan
9 Black
Secondary
Weld
Current Measurement Return
10
Black
Weld Transformer Select Line 1 (For MA-600)
11
Black
Secondary Weld Voltage Measurement Return
12
Black
Weld Transformer Select Line 3 (For MA-600)
13
Black
Weld Transformer Thermo Switch Return
14 Black
Future
Expansion
15 Red
Future
Expansion
16
Red
230 VAC Weld Transformer Fan Return
OUTPUT
The Output Cable feeds high voltage, pulse width modulated, primary weld current to the primary
winding of the HF2 Weld Transformer. The connector attached to the end of the Output Cable is an
AMP 206136-1 (Unitek P/N: 520-115). The mating connector on the HF2 Weld Transformer is an
AMP 206137-1 (Unitek P/N: 550-071).
Pin No.
Wire Color
Description
1
Black
Primary HF2 Weld Transformer
2
Red
Primary HF2 Weld Transformer
4 Green
Chassis
Ground
6
White
Primary HF2 Weld Transformer Return
7
Orange
Primary HF2 Weld Transformer Return
