MR-23006-AT Remote Multiplex Annunciator Panel Wiring and Installation Manual
3
Wiring Instruction
T
he
RS-485 Wiring
to the
MR-2306-AT
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 MR-2306-AT 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.
WARNING:
Accidentally connecting any of the 24 VDC wires to the RS-485 wiring
will result in damage
to
the annunciator and/or to the fire alarm control panel to which it is connected.
Total
Maximum
Current for all
Annunciators
Maximum Wiring Run to Last Annunciator
Max Loop
Resistance
18AWG
16AWG
14AWG
12AWG
0hms
Amperes
ft.
m
ft.
m
ft.
m
ft.
m
Ohms
0.12
1180
360
1850
567
3000
915
4250
1296
15
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
