3
CONTROLS & DISPLAYS:
For precise definitions of Control & Display operation, refer to the manual for the Fire Alarm Control Panel that the Annunciator
is being connected to.
Controls
Displays
System Reset, Signal Silence,
AC On, Common Trouble, Signal Silence,
Buzzer Silence, Lamp Test.
8 Circuit Status LED’s.
WIRING INSTRUCTION:
The
RS-485 Wiring
to the FW-RA-LED Module is
recommended to be
Twisted Shielded Pair
as
shown in the diagram. The wire gauge may be;
22 AWG up to
2000 ft.
20 AWG up to
4000 ft.
18 AWG up to
8000 ft.
The RS-485 wiring from the Fire Alarm Control
Panel to the Annunciator(s) must be point-to-point
from the FA Panel to the first Annunciator, then the
next Annunciator, and so on.
No star-wiring or T-
tapping is allowed.
Each RAM-208 Annunciator
Module has a
120 ohm End-of-Line Resistor
on
its RS-485 Output terminals. This is removed on
all except the last wired Module.
The 24 VDC field wiring needs to be of an
appropriate gauge for the number of annunciators
and the total wiring run length. See the
Specifications
section
“Current Drain for Battery
Calculations”
, and calculate the
Maximum
current
for all Annunciators summed together ...
NOTE:
Accidentally connecting any of the 24
VDC wires to the RS-485 wiring could
result in damage to the Annunciator
and/or to the Fire Alarm Control Panel that it is connected to !!!
Maximum for
MAXIMUM WIRING RUN TO LAST ANNUNCIATOR
MAX. LOOP
all Annunciators
RESISTANCE
18AWG
16AWG
14AWG
12AWG
Amperes
ft
m
ft
m
ft
m
ft
m
Ohms
0.30
470
143
750
229
1200
366
1900
579
6
0.60
235
71
375
114
600
183
850
259
3
0.90
156
47
250
76
400
122
570
174
2
1.20
118
36
185
56
300
91
425
129
1.5
1.50
94
29
150
46
240
73
343
105
1.2
1.70
78
24
125
38
200
61
285
87
1.0
