Carrier WeatherMaster 50HC14 Installation Instructions Manual page 51

Refer to the PremierLink™ Controller Installation, Start-up,
and Configuration Instructions for additional information on
configuring the PremierLink controller for Door Switch timer
function.
POWER EXHAUST (OUTPUT) — Connect the accessory
Power Exhaust contactor coil(s) per Fig. 75.
Power Exhaust
PEC GRA
TAN
Fig. 75 — PremierLink Controller Power Exhaust
Output Connection
CCN COMMUNICATION BUS — The PremierLink con-
troller connects to the bus in a daisy chain arrangement. Nega-
tive pins on each component must be connected to respective
negative pins, and likewise, positive pins on each component
must be connected to respective positive pins. The controller
signal pins must be wired to the signal ground pins. Wiring
connections for CCN must be made at the 3-pin plug.
At any baud (9600, 19200, 38400 baud), the number of con-
trollers is limited to 239 devices maximum. Bus length may not
exceed 4000 ft, with no more than 60 total devices on any
1000-ft section. Optically isolated RS-485 repeaters are re-
quired every 1000 ft.
NOTE: Carrier device default is 9600 baud.
Communications Bus Wire Specifications
Communication Bus wiring is field-supplied and field-
installed. It consists of shielded 3-conductor cable with drain
(ground) wire. The cable selected must be identical to the CCN
Communication Bus wire used for the entire network.
See Table 22 for recommended cable.
Table 22 — Recommended Cables
MANUFACTURER
Alpha
American
Belden
Columbia
TB3 PL
J8-3
15
CTB
THERMOSTAT
C
The CCN
—
CABLE PART NO.
2413 or 5463
A22503
8772
02525
NOTE: Conductors and drain wire must be at least 20 AWG,
stranded, and tinned copper. Individual conductors must be
insulated with PVC, PVC/nylon, vinyl, Teflon, or polyeth-
ylene. 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. Do not run communication wire in the same conduit
as or next to any AC voltage wiring.
The communication bus shields must be tied together at
each system element. 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 communi-
cation bus cable exits from one building and enters another
building, the shields must be connected to the grounds at a
lightning suppressor in each building (one point only).
Connecting CCN Bus
NOTE: When connecting the communication bus cable, a
color code system for the entire network is recommended to
simplify installation and checkout. See Table 23 for the recom-
mended color code.
Table 23 — Color Code Recommendations
SIGNAL TYPE
+
GROUND
–
Connect the CCN (+) lead (typically RED) to the unit's
TB3-12 terminal. Connect the CCN (ground) lead (typically
WHT) to the unit's TB3-14 terminal. Connect the CCN (–)
lead (typically BLK) to the unit's TB3-16 terminal. See
Fig. 76.
CCN Bus
+ (RED)
GND (WHT)
– (BLK)
Fig. 76 — PremierLink Controller CCN Bus
51
CCN BUS WIRE CCN PLUG PIN
COLOR NUMBER
Red 1
White 2
Black 3
TB3
12
TB3
14
TB3
16
Connections
PL
J2-1
J2-2
J2-3