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2-13. Safety Circuits
-continued
A fourth safety circuit halts hammer firing in the event of a hammer master clear, HMC, or the loss
of the hammer reset pulse, HRS. When HMC is low, the output of the one millisecond one-shot,
U16, is normally kept high while being triggered by HRS pulses. Whenever HRS pulses stop or
HMC goes high, the one-shot resets within one millisecond and hammer firing stops.
Figure 2-34. Safety Circuits
P6040/P6080 Principles of Operation
2-67
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