Johnson Controls Metasys IFC-200 - Wire Requirements

Hardware Installation—IFC-200 Hardware Installation Procedures 47
Wire Requirements
Each of the various types of circuits within an IFC-200 Fire Control
System has a specific type of wire that must be used in order to ensure
proper operation. In addition, the wire gauge of a particular circuit is
contingent on the length of that circuit. Use the table below to determine
the specific wiring requirements for each circuit.
Note: If the SLC loop is run in conduit with indicating appliance circuits,
employ only electronic sounders, such as the MA/SS-24. This
greatly reduces the risk of encountering problems caused by using
more electronically noisy indicating appliances, such as electro-
mechanical bells or horns.
Table 12: IFC-200 Wire Requirements
Circuit Type Circuit Function Wire Requirements Distance
(Feet)
Typical Wire Type
SLC
(Power
Limited)
Connects to Intelligent
and Addressable
Modules
Twisted-shielded pair,
12 to 18 AWG. 40 ohms
maximum per length of
Style 6 and 7 loops.
40 ohms per branch
maximum for Style 4 loops.
10,000
8,000
4,875
3,225
Belden 9583 (12 AWG)
Belden 9581 (14 AWG)
Belden 9575 (16 AWG)
Belden 9574 (18 AWG)
Untwisted, unshielded wire,
in conduit or outside of
conduit.
1,000 12-18 AWG
RS-485
(power
limited)
Connects to LCD-80 or
to Annunciator Control
System Modules
Twisted-shielded pair.
18 AWG minimum.
6,000 (max) Belden 9575
(16 AWG)
RS-232
(power
limited)
Connects to PRN-3 or
P40 Remote Printers,
CRT-1, and to PC
Twisted-shielded pair.
18 AWG minimum.
50 (without
modem)
Belden 9575
(16 AWG)
M500MJ,
M501MJ
M502MJ
(power
limited)
Initiating Device Circuit 12-18 AWG. Maximum IDC
wire resistance is 20 ohms.
To meet
20 ohms
12-18 AWG
M510CJ
(power
limited)
Indicating Appliance
Circuit
12-18 AWG. MPS-24A: At
alarm current level, no more
than a 1.2 volts drop at the
end of the circuit.
To meet
1.2 volt drop
12-18 AWG
24 VDC Power
Runs
(power
limited)
To Annunciators; to
M510CJs;
12-18 AWG. Size wire so
that no more than 1.2 volts
drop across wire run from the
supply source to end of any
branch.
To meet
1.2 volt drop
12-18 AWG
NR45-24
Remote Secondary
Power Source
12 AWG in conduit. 20 (max) 12 AWG