
128
SCS Series Manual —
P/N 15712:L 7/18/16
Ratings and Wiring Diagrams
Non-dedicated Smoke Control System Wiring Diagrams
Figure 5.19 Fan Control, Non-dedicated System - FSCS Switch Group Type 4
Figure 5.19 depicts a fan in a non-dedicated system with the capability of
ON
control and verification of the
OFF
state, switch group type 4. In
the above configuration, the CON
ON⁄OP
CM is deactivated. The CON
ON⁄OP
CM is wired in parallel with the EMS; when wired in parallel with
the EMS the CM must be a relay module. When the CON
ON⁄OP
CM is deactivated, the EMS is free to control the fan. In this case the EMS is
OFF
, so no power is being supplied to the fan. When no power is supplied to the fan, the fan is
OFF
and the sail switch is
CLOSED
, indicating
no airflow in the duct. The VER
OFF⁄CL
MM monitors the
CLOSED
position of the sail switch, which would indicate when the fan is
OFF
. In this
case the VER
OFF⁄CL
MM is activated because the fan is
OFF
due to the EMS. When the CON
ON⁄OP
CM is activated, the CON
ON⁄OP
CM over-
rides whatever state the EMS is in and closes the normally open contactor, thus supplying power to the fan and turning it on.
FRM-1
COM
N/O
.
Power Source
1a listed
contactor
Service
Disconnect
Switch
ELR-47K
(use 3.9K listed ELR with FZM-1)
Listed
Sail
Switch
N/O
COM
N/C
Power Return
Listed
24 VDC
Power Source
VER
OFF/CL
MM
(activated)
fa
n-
nf4
-f
s
-2
.w
m
f
SLC Loop
FAN OFF
Energy
Management
System
FMM-1
CON
ON/OP
CM
(deactivated)
*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.