
SCS Series Manual —
P/N 15712:L 7/18/16
129
Non-dedicated Smoke Control System Wiring Diagrams
Ratings and Wiring Diagrams
Figure 5.20 Fan Control, Non-dedicated System - FSCS Switch Group Type 5
Figure 5.20 depicts a fan in a non-dedicated system with the capability of
ON
control and verification of the
ON
state, switch group type 5. 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
ON⁄OP
MM monitors the
OPEN
position of the sail switch, which would indicate when the fan is
ON
. In this
case the VER
ON⁄OP
MM is deactivated 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
.
Switch group type 6 is for a fan that would require the capability of
ON
control and verification of both the
ON
and
OFF
states. Since it is pos-
sible to determine this information from both switch group type 4 or switch group type 5, switch group type 6 would only be necessary for
redundancy in verifying the state of the fan. For example, if switch group type 4 is used instead of switch group type 6, the
OFF
state of the
fan would be verified when the monitor module is activated and the
ON
state of the fan would be verified when the monitor module is deac-
tivated. Utilizing switch group type 4 or 5 also saves the use of an additional monitor module. Switch group type 6 would use two monitor
modules to provide the same verification as types 4 or 5.
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
VER
ON/OP
MM
(deactivated)
fa
n-
nf
5
-f
s
-2
.wm
f
SLC Loop
FAN OFF
Energy
Management
System
Listed
24 VDC
Power Source
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.