APPENDIX F: RELAY TIMING DIAGRAMS
UB25 LINEAR DC RESISTANCE WELDING CONTROL
F-2 990-665
END OF WELD
When welding, the relay output signal will start 0-150 milliseconds after the end of the HOLD period and
will stay energized for 350-450 milliseconds. * The relay will still close in case of an aborted weld.
* If another weld is initiated within this time, the END OF WELD relay will be reset at the start
of the next weld.
ALARM
The relay output signal will start when the Control senses certain ALARM conditions (with the exception
of OUT OF LIMITS alarms) and will stay energized until the ALARM state is cleared by pressing the
RUN button (refer to Appendix E, LCD Display Messages).
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