P/N 06-236530-001 1-17 August 2013
1-6 ISOLATOR MODULES
Isolator modules are automatic switches that open a segment of the signaling line circuit when
a short-circuit fault is detected in that segment. The remainder of the signaling line circuit
continues to function normally and is unaffected by the short-circuit fault. The isolator modules
will close and resume normal operation when the short-circuit fault is removed.
Isolator module, P/N 74-200012-002, is supplied with a plastic cover plate for mounting to a
single-gang electrical box. Isolator module, P/N 74-200012-004, is designed to mount in the
electrical box for the Model 6SB detector base.
Figure 1-24. Isolator Modules
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Underwriters
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