4.4 Quad Channel Input Module
4.4.1 Functions of the Quad Channel Input Module
Each Quad Channel Input Module is used to power and monitor up to 4 detectors. For a list of
available Crowcon detectors, see Appendix D.
The first channel on each Quad Channel Input Module can be connected to a gas detector, or to a
maximum of 20 chained conventional loop-powered fire detectors and manual call points. The
remaining channels can be used only with 4-20mA.
Figure 5 gives a general view of the Quad Channel Input Module. Figure 18 (Appendix B) shows the
electrical connections between the Quad Channel Input Module and the detectors.
The detectors are connected to Inputs 1, 2, 3 and 4 labelled items A, B, C and D in Figure 5.
Figure 5: Quad Channel Input Module
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