142 SCS Series Manual — P/N 15712:L 7/18/16
Ratings and Wiring Diagrams Non-dedicated Smoke Control System Wiring Diagrams
Figure 5.33 EP Damper Control, Non-dedicated System - FSCS Switch Group Type 2
Figure 5.33 depicts an EP damper in a non-dedicated system with the capability of CLOSED control and verification of the OPEN state, switch
group type 2. In the above configuration, the CON
OFF⁄CL
CM is activated. The CON
OFF⁄CL
CM controls a normally open contactor for the
pressure switch power line. When the CON
OFF⁄CL
CM is activated, the normally open contactor is closed. When the contactor closes, power
is supplied to the pressure switch, which cuts the airflow to the damper and closes it. When the CON
OFF⁄CL
CM is deactivated, the EMS is
free to control the damper. The EMS is currently being overridden by the CON
OFF⁄CL
CM.
When power is supplied to the pressure switch, the damper closes. When the damper completely closes, the damper closed limit switch is
CLOSED, indicating that the damper is in the CLOSED position. The VER
ON⁄OP
MM monitors the CLOSED position of the damper closed limit
switch. In this case the VER
ON⁄OP
MM is deactivated because the damper is CLOSED.
Airflow
PRESSURE
SWITCH
SMOKE
DAMPER
CLOSED
1a listed
contact
Power Source
Listed
24 VDC
Power Source
SLC Loop
FCM-1
CON
OFF/CL
CM
(activated)
DEP-NF2A-fs-2.wmf
Power
Return
VER
ON⁄OP
MM
(deactivated)
FMM-1
N/O
COM
Limit Switch
for open
position
ELR-47K
(use 3.9K listed ELR with FZM-1)
Pneumatic
Tubing
*If the SLC device
does not match the
one in this figure,
refer to the SLC
manual appendix,
which contains
wiring conversion
charts for type V
and type H
modules.
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