SilentKnight 5499 9A Distributed Power Module - Manual (Page 30)

5499 Distributed Power Module Installation Manual
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5.3 Door Holder Application
In a typical door holder application, the door holder power must be interrupted to
close all fire doors under the following conditions:
• Any active alarm condition.
• AC power failure (to conserve battery power).
To close the fire doors in these situations, wire an N.C. programmable relay from the
FACP in series with the auxiliary power to the door holders as shown in Figure 5-7.
The circuit shown in Figure 5-7 will provide up to 3 amps of door holder power. (See
Section 5.2 if you need more than 3 amps of auxiliary power.) The power in this
example is released when AC power is off for 30 seconds or more, or when the relay
from the fire alarm control panel becomes open. You would have to use the
equivalent of a programmable relay from a fire alarm control panel that is
programmed to open under alarm conditions. See Section 4.8.4 for selecting auxiliary
power options.
Figure 5-7 Door Holder Wiring Example
5499
Fire Alarm Panel
ESL DHX 1224