APPENDIX B: ELECTRICAL AND DATA CONNECTIONS
HF-2500A HIGH FREQUENCY WELD CONTROL
990-371 B-7
Pin Signal Name Description
32
CURRENT_STOP
Interrupts weld current ( < 100 μs from current_stop trigger to end-of-
weld current with debounce set to 0)
33
RELAY_1
Relay 1 output, dry contact, programmable
Contact rating: 24 VDC/AC, 1 amp
34
RELAY_1R
35
RELAY_2
Relay 2 output, dry contact, programmable
Contact rating: 24 VDC/AC, 1 amp
36
RELAY_2R
37
RELAY_3
Relay 3 output, dry contact, programmable
Contact rating: 24 VDC/AC, 1 amp
38
RELAY_3R
39
RELAY_4
Relay 4 output, dry contact, programmable
Contact rating: 24 VDC/AC, 1 amp
40
RELAY_4R
41-59
Not Active Not active
60
CHASSIS GROUND Chassis ground
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