Fire Alarm Connection; One & Two Stage Operation; Bell Cut Operation - Mircom QX-5000 Series Installation And Operation Manual

Fire Alarm Connection

Fire Alarm Connection
The interface between the QX-5000 and the fire alarm control panel is via three to five wire-pair connections. These
include:
Signal Wiring (X2)
Two fire alarm control panel indicating / signalling circuits are connected as previously shown. Both are configured
as strobe (non-coded) signal circuits. One is configured as silenceable and the other as non-silenceable. this gives
complete alarm condition status to the QX-5000. If both are activated after having been off, there is a first alarm in
the system; this tells the QX-5000 to start its one minute inhibit if it is enabled. If the silenceable signal is de-
energized, then there is a signal silence condition. If the silenceable signal is re-energized then there has been a
subsequent alarm. If both signals are de-energized, the fire alarm has been reset.
Trouble Contacts
The QIF-5000B provides a trouble contact. This presents a 3.9K, 1/2W end-of-line resistor when there are no QX-
5000 troubles, and an open-circuit if there are troubles. This is connected to an initiating circuit on the fire alarm
control panel that is configured as a trouble-only circuit.
GA Contact
Used only with a two-stage system (described below).
Bell Cut Relay
Used only if audible devices (bells and horns) are installed on the main fire alarm panel; described in QRM-1001
Bell Cut Instructions.
Note: The supervision of the QIF-5000B trouble contacts, silenceable signal & non-silenceable signal wiring
is performed by the fire alarm, while the supervision of the general alarm contact wiring is performed
by the QIF-5000B.
One & Two Stage Operation
The QX-5000 is capable of operating with both one and two-stage fire alarm control panels. This is enabled via the
QIF-5000B's general alarm contact input (see previous page). This input is DC supervised by the QIF-5000B via a
3.9K, 1/2W end-of-line resistor. It is wired as follows:
Single Stage System
The QIF-5000B GA contact terminals are permanently shorted be a length of 22 AWG wire. This forces the QX-5000
to always produce evacuation tones during an alarm condition.
Two Stage System
The QIF-5000B GA contact terminals are connected to a common alarm relay contact on the fire alarm control panel
with a Mircom MP-300 ELR. The fire alarm must be configured so that the common alarm relay is only activated
when in second-stage evacuation mode. If the fire alarm cannot support this operation, then it cannot be used with
the QX-5000 in a two stage operation.

Bell Cut Operation

The bell cut operation is available when both QX-5000 speaker zones and fire alarm audible signal zones (bells or
horns) are used. This option requires that the fire alarm control panel supports a bell cut initiating circuit. This is a
supervised input which, when shorted, disables all audible signals. The optional QRM-1001 Bell Cut Relay Module
is installed into the QX-5000 Audio Cabinet, plugged into J6 on the QIF-5000B using cable assembly MD-622. This
module is wired as shown in the LT-647 QRM-1001 Instruction sheet that is provided with the QRM-1001.
When the system is operating in alarm and is non-silenced and the operator pages from the QMP-5100B/5101
microphone, or warden pages, the QX-5000 activates the QRM-1001 relay sending the "bell-cut" signals to the fire
alarm. The fire alarm will silence any audible signals for the duration of the paging.
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