Dedicated Smoke Control System Wiring; Overview; Dedicated Damper Control - Simplex 4100U Application Manual

Dedicated Smoke Control System Wiring

Overview

Dedicated
Damper Control
(Per Installation Instructions, 574-876)
Dedicated Smoke Control System wiring is usually straightforward. The Smoke Control System is
the only source for commands to the fans and dampers, and therefore bypass and cut-off relays are
not needed. The following sections illustrate some examples of dedicated fan and damper control.
Damper control is a basic function of the Simplex Smoke Control System. Interconnections to
motorized dampers are shown in Figures 4-2 and 4-3.
The figure below shows dedicated motorized damper control using a 4090-9120 6-Point I/O
Module. Both relay outputs are used, one to control opening the damper and the other to control
closing it.
The wiring between the 6-Point I/O Module and the control relays is unsupervised, so the module
must be mounted within three feet of the relays/dampers in accordance with NFPA 72.
Note: The wiring to the limit switches is supervised and limited to 500 ft. (152 m).
INPUT 1
INPUT 2
IDNet +
IDNet -
OPEN POSITION
LIMIT SWITCH
N/O
COMM
N/O
COMM
CLOSED POSITION
LIMIT SWITCH
6.8 K 1/2 W EOLR
Figure 4-2. Dedicated Motorized Damper Control Using a 6-Point I/O Module
+24V 1A @ 30 VDC
FROM or
FACP 1/4 A @ 120 VAC
0V
COMM
N/O
COMM
N/O
SMOKE DAMPER
4-6
POWER
SOURCE
LISTED
CONTROL
RELAY
(N/O)
DAMPER
CLOSED
POWER
DAMPER
OPEN
POWER
RETURN
Continued on next page
LISTED
CONTROL
RELAY
(N/O)