SilentKnight 5129 Digital Alarm Communicator Transmitter - Manual (Page 17)

Panel Description and Installation
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3.7 AC Monitoring
The 5128/29 features an AC monitoring circuit. The communicator will report AC trouble when AC has been
below 85 percent of nominal for a programmed amount of time. The 5128 AC monitoring can be performed
with a dry contact active high voltage input (see Section 3.7.1). The Model 5129 can monitor AC voltage
directly (see Section 3.7.3).
3.7.1 Voltage Input—Active High
If the fire control panel has an active high AC trouble voltage output (18 to 30 VDC), attach this output directly
to the low AC channel input on the 5128/29. (See Figure 3-6.)
3.7.2 Dry Contact
If the fire control panel monitors its AC input and has a contact closure AC trouble output, connect the AC
monitor input of the 5128/29 through the normally open contacts of the FACP (see Figure 3-6). Select “Active
Low” in programming Step 23.
Figure 3-6 AC Monitoring Configurations Through P5
Active High Input Configuration Dry Contact Input Configuration
Supervised
Power Limited Supervised
Power Limited