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4 Axis

Wiring Guide

Unless otherwise noted, all circuits permitted to be in same conduit. Check local codes for additional restrictions. Twisted shielded
cable provides a degree of protection and immunity to electrical noise interference (RFI/EMI) compared to twisted pair or untwisted
wire. If shielded cable is used, connect the shield to the panel enclosure (out and return) and to the dedicated shield terminations in
the bases only.

Note: If shielded cable is utilized, the shield connection must be a continuous circuit around the loop and must not be in
contact with any other earth/ground point (including electrical back boxes).

If running NAC and/or 24 VDC circuits in the same conduit as other signals, you can reduce problems by exclusively using electronic
sounders instead of electronically noisy notification appliances (such as electromechanical bells or horns).

Circuit Type

Circuit

Function

Wire Types

Maximum

Distance

Typica

l Wire

Size

(AWG)

Comments

SLC
(power limited)

Connects to
intelligent
modules and
smoke
detectors

Twisted Unshielded Pair
* Maximum resistance is

dependent on SLC
loop loading (see note
#1)

12,500 feet
(see note #1)

12-18

AWG

If multiple loops are inside the same conduit it is acceptable to use
twisted unshielded wire as SLCs will not interfere with one another. It is
acceptable to run other signals inside the same conduit however, it’s
recommended that the other wires are either twisted or twisted shielded.
The Axis

panels contain loop power technology. The SLC circuits are

capable of driving high current loads in alarm, which affects the load
characteristics including V/I drops along the wire length. Therefore, it is
important to utilize Advanced loop calculator in determining wire gauge
and length.

Twisted Shielded Pair

12,500 feet
(see note 1)

12 -18

AWG

Shield must only be connected to earth ground at one location - at the
fire panel.

Untwisted, Unshielded
Pair

1,000 feet
(see note 1)

It’s not recommended to mix inside conduit with other signals unless
other signals use either twisted or twisted shielded wire.

PBUS
EIA-485
(power limited)

Connects
peripheral
modules to
AX-CTL
base card

Twisted Unshielded or
Twisted Shielded

5000 feet

18-20

AWG

Twisted unshielded or twisted shielded wire is acceptable whenever the
PBUS is wired internal and/or external to the fire panel enclosure. Must
install a 150 ohm resistor at end of the PBUS wire run. When using
shielded wire, you must install a 2.2

fd non polarized capacitor from

shield to ground at one end and terminate shield to panel ground at other
end.

EIA-232
(power limited)

Connects to
printers or
PC

Shielded

50 feet

18-20

AWG

NACs
(power limited)

Connects to
horns,
strobes,
solenoids,
etc.

Twisted Shielded,
Twisted Unshielded,
Untwisted Unshielded.

4000 feet
(see note 2)

12-22

AWG

If supporting highly inductive/noisy loads use twisted shielded wire.

Network
EIA-485
(power limited)

Ad-NeT-
PluS peer-
to-peer
network

Twisted Shielded or
Fiber Optic Cable

5000 feet
Class B

66000 feet
Class X (A)
(5000 ft
between
Nodes)

18-20

AWG

Fiber Optic – 16,404 ft between nodes max. Jacket material must be
rated for application.
Note that network node to node communications are optically isolated
and each node has an independent ground fault detection circuit. To
insure prevention of earth “ground loops”, the shield must be terminated
at one node and not both. This is accomplished internally at each node
via dedicated shield terminals.
Each network node module has isolated outgoing and incoming network
wiring terminals. Connect from the “OUT” terminal on the first node to
the “IN” terminal on the next node (A, B and Shield).

Shield

B
A

Shield
B
A

I
N

Shield
B
A

Telephone
Riser (power
limited)

Firefighter
Telephone
communicati
ons1 to 6
channels for
firefighter
phones

Twisted Shielded Pair

4000 feet
(see note 3)

18-20

AWG

Audio Riser
(power limited)