Macurco CM-xx Operation Manual
REV – 1.2.1 [34-2900-0511-6 ] 16 | Page
Figure 3-15 12-Series Alternate Alarm Panel
In this application (above) the Fan or primary relay is used as a low-level alarm relay. The Alarm or secondary relay is used as a
supervisory relay when utilized in the normally closed configuration. The CM-12 monitors all critical functions of the unit
through software diagnostics that continually test and verify its operations. If a problem is found, the unit will switch to a fail-
safe/error mode or trouble condition. In this error mode the Fan* and Alarm relays will be activated indicating the trouble
condition at panel and the CM-12 display will flash the error. See section 4.5.11 Trouble Fan Setting – “tFS” for options.
Figure 3-16 12-Series Horn & Strobe Combo Wiring
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