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The first device in a network connects directly to the bridge
and the others are wired sequentially in a daisy chain fashion.
Refer to Fig. 11 for an illustration of communication bus
wiring.
COMMUNICATION BUS WIRE SPECIFICATIONS —
The communication bus wiring is field-supplied and field-
installed. It consists of shielded three-conductor cable with
drain (ground) wire. The cable selected must be identical to the
Carrier Network communication bus wire used for the entire
network. See Table 3 for recommended cable.
Table 3 — Recommended Cables
MANUFACTURER
Alpha
American
Belden
Columbia
NOTE: Conductors and drain wire must be at least 20 AWG
(American Wire Gage), stranded, and tinned copper. Individual con-
ductors must be insulated with PVC, PVC/nylon, vinyl, Teflon, or
polyethylene. An aluminum/polyester 100% foil shield and an outer
jacket of PVC, PVC/nylon, chrome vinyl, or Teflon with a minimum
operating temperature range of –20 C to 60 C is required.
CONNECTION TO THE COMMUNICATION BUS
1. Strip the ends of the red, white, and black conductors of
the communication bus cable.
2. Connect one end of the communication bus cable to
the bridge communication port labeled COMM2 (if
connecting on a secondary bus).
DRAIN WIRE (TYP)
1 2 3
BYPASS
CONTROLLER
CABLE PART NO.
2413 or 5463
A22503
8772
02525
BLK (TYP)
WHT (TYP)
RED (TYP)
1 2 3
ZONE
CONTROLLER
Fig. 11 — Communication Bus Wiring
When connecting the communication bus cable, a color
code system for the entire network is recommended to
simplify installation and checkout. See Table 4 for the
recommended color code.
Table 4 — Color Code Recommendations
SIGNAL TYPE
+
Ground
–
3. Connect the other end of the communication bus cable
to the terminal block labeled CCN in the bypass
controller. Following the color code in Table 4,
connect the Red (+) wire to Terminal 1. Connect the
White (ground) wire to Terminal 2. Connect the Black
(–) wire to Terminal 3.
4. Connect additional devices in a daisy chain fashion,
following the color coded wiring scheme in Table 4.
Refer to Fig. 11.
NOTE: The communication bus drain wires (shield) must
be tied together at each device. If the communication bus is
entirely within one building, the resulting continuous shield
must be connected to ground at only one single point. If the
communication bus cable exits from one building and enters
another building, connect the shields to ground at a light-
ning suppressor in each building where the cable enters or
exits (one point only).
1000 FT. MAXIMUM
6 5 4
SYSTEM
PILOT
11
COMMUNICATION
BUS WIRE COLOR
Red
White
Black
1 2 3
ZONE
BRIDGE
CONTROLLER
(RECOMMENDED)
PLUG PIN
NUMBER
1
2
3
GND
1 2 3 4
COMM 2
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