
Cabling, installing, and configuring the peripheral devices 8-39
Connecting external alarms
Standard 1.0 Option 11 EC Installation and Maintenance Guide November 1999
Note: NO=normally open, NC=normally closed,
CM=common.
Alarm cable
connections
Note: This example shows the alarms connected to normally
open contacts (NO and CM). Another type of alarm may need
to be connected to normally closed contacts (NC and CM).
EC 11
ALM/MOD
NO
CM
NC
NO
Alarm
Device
Alarm
Device
Minor
CM
NC
Major
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