Chapter 1: Introduction
10 VM-1 User Guide
Control/Indicator Description
All Call Minus Pressing the All Call Minus button broadcasts a live voice message
to areas that are not configured to receive evacuation or alert
signals. Pressing the button a second time exits the All Call Minus
mode. The LED turns on when the system is in All Call Minus mode.
Ready To Page
LED flashes during a preannouncement tone and is steady when the
system is ready to page.
Paging Volume
LED shows the audio level of the person speaking into the
microphone.
System operation
The basic function of the VM-1 control panel is to monitor status changes in the
life safety system and to activate outputs according to the site-specific software.
Status change signals, also called events, are classified as follows:
• Alarm (highest priority): Events that signal fire alarms or other life-threatening
emergencies
• Supervisory: Events that signal off-normal conditions with sprinkler and
extinguishing systems and other equipment related to property safety
• Trouble: Events that signal faults within the system
• Monitor (lowest priority): Events that signal the operation of ancillary
equipment
During normal operation (no events), the VM-1 control panel displays the Normal
screen (see Figure 2 on page 4). When a point in the automatic fire detection
system signals a status change, the VM-1 control panel:
• Posts the event message for the point that signaled the change into the
appropriate event message queue and displays the off-normal screen (see
Figure 3)
• Turns on the corresponding system status LED
• Turns on the panel buzzer to the pattern for the highest priority active event
• Displays the most recent, highest priority event message (see Figure 3)
• Activates common relays and programmed outputs
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