Som-4, Drm-4, Notification appliance circuit (nac) – Potter PFC-9000 Series User Manual
Page 42
42
PFC-9000 • 5403535 • REV G • 9/08
S (IN)
24+ (OUT)
SOM-4
24- (OUT)
24+ (IN)
24- (IN)
OUT ( + )
OUT ( - )
SC (IN)
S (OUT)
SC (OUT)
FROM PFC-9000
TO NEXT
DEVICE
10K EOL
DWG# PFC-9000-29A
All wiring shown
is supervised and
inherently power
limited.
UL Listed regulated,
power limited supply
for fire protection
signaling service for
audible devices.
DRM Relay Module
The DRM is a relay module that is controlled by the fire alarm panel and correlated to the inputs of the system. The DRM has two
independent form C relays that activate simultaneously. Both relays must be wired either power limited or non-power limited.
When the device is activated the red LED will latch on and the relays will change position. When the device is being polled the
LED will flash. Contacts are rated 2 Amps at 30 VDC.
Use only FPL, FPLR, or FPLP wiring in accordance with Article 760 of the National Electrical Code.
S (IN)
NO1
DRM-4
COM1
NC1
NO2
COM2
NC2
SC (IN)
S (OUT)
SC (OUT)
FROM PFC-9000
TO NEXT
DEVICE
DWG# PFC-9000-29B
All wiring shown
is supervised and
inherently power
limited.
(FORM “C”
CONTACTS NON-
SUPERVISED)
SET 2
SET 1
All wiring shown on contact
terminals are shown in standby
mode.
Inputs to both sets of Form “C” contacts must be either Power Limited or Non-Power Limited. Do not mix Power Limited
wiring with Non-Power Limited wiring on contact side.
Notification Appliance Circuit (NAC)
NAC installation wiring shall not exceed 50 Ohms