What is Resistance in A Fire Alarm??
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return, the IDC, changing its resistance to affect the amount of current flow, changes the voltage seen by the panel on the screw terminals. This two-way realationship of voltage pushing the current and the resistance affecting the current can be seen in the book "Make It Work - Conventional Fire Alarms".
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approximately 10 kilo-ohms, which reduces to a few ohms as the temperature increases beyond 100°C.
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