Simplex 4100U Application Guide

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Regardless of the method, the basic concept behind controlling smoke is to use differences in air
pressure to minimize the spread of smoke and, if possible, vent it from the building.
You cannot confine smoke by simply closing all access ways (such as doors and vents) to the
room that has the fire in it. Even with these passages closed off, smoke can disperse throughout a
building via cracks, holes made for pipes and electrical wires, and spaces around doors and
windows. Smoke is driven through these small openings by the expanding gases from the fire.
Smoke can also be driven onto other floors by the “stack effect,” which causes air to rise in
buildings. The stack effect is caused by the difference in the interior and exterior temperature of
the building. The figure below shows how smoke can disperse throughout a building:
Figure 1-1. Smoke Infiltrating Rooms Adjacent to the Fire
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Controlling Smoke Movement
Basic Concept
Area On Fire
Adjacent Room
Adjacent Room
SMOKE
Second Floor
First Floor
Adjacent Room
Adjacent Room
Adjacent Room

Simplex 4100U Specifications

General

Control Panel Type	Addressable Fire Alarm Control Panel
Display	LCD
Power Supply	120/240 VAC, 50/60 Hz
Max Signaling Line Circuits (SLC)	2
Operating Temperature	0°C to 49°C (32°F to 120°F)
Humidity Range	10% to 93% non-condensing
Network Capability	Yes
Communication Protocol	RS-232, RS-485
Battery Backup	24 VDC
NAC Outputs	4
Signaling Line Circuits (SLCs)	2
Power Supply Current	3.0 A
Max Notification Appliance Circuits (NAC)	4
Max Releasing Circuits	4
Max Relay Circuits	4
Communication Ports	RS-232, RS-485