49
CCN Communication Bus —
The PremierLink
t
controller connects to the bus in a daisy
chain arrangement. Negative 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
controllers 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 required every 1000 ft.
NOTE
: Carrier device default is 9600 baud.
Communications Bus Wire Specifications:
The CCN
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 25 for recommended cables.
Table 25 – Recommended Cables
MANUFACTURER
CABLE PART NO.
Alpha
2413 or 5463
American
A22503
Belden
8772
Columbia
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 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. Do not run communication
wire in the same conduit as or next to any AC voltage
wiring.
* Teflon is a registered trademark of DuPont.
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
communication 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 26 for the recommended color code.
Table 26 – Color Code Recommendations
SIGNAL TYPE
CCN BUS WIRE
COLOR
CCN PLUG PIN
NUMBER
+
Red
1
Ground
White
2
---
Black
3
Connect the CCN (+) lead (typically RED) to the unit’s
TB1--12 terminal. Connect the CCN (ground) lead
(typically WHT) to the unit’s TB1--14 terminal. Connect
the CCN (--) lead (typically BLK) to the unit’s TB1--16
terminal. See Fig. 64.
CCN Bus
J2-1
J2-2
GND (WHT)
12
14
TB1
J2-3
– (BLK)
16
TB1
TB1
PL
+ (RED)
C08276
Fig. 64 -- PremierLink Controller CCN Bus
Connections
Summary of Contents for 50TCQD
Page 5: ...5 C14192 Fig 2 Unit Dimensional Drawing 14 Size Unit ...
Page 6: ...6 C14193 Fig 2 Unit Dimensional Drawing 14 Size Unit cont ...
Page 10: ...10 C10365 Fig 6 Roof Curb Details ...
Page 17: ...17 a50 9707 Fig 26 Typical 50TCQ Control Wiring Diagram ...
Page 18: ...18 a50 9708 Fig 27 Typical 50TCQ Power Wiring Diagram 208 230V 3 Phase 60Hz unit shown ...
Page 43: ...43 a50 9710 Fig 50 PremierLinkt Controller Wiring Schematic ...
Page 51: ...51 a50 9711 Fig 66 RTU Open Controller System Wiring Diagram ...
