Field Connection Terminal Strip; Low Voltage Terminal Strip (Tb1) - Carrier 48/50PG C03-14 Operation And Service Manual

Low Voltage Terminal Strip
(TB1 on PG03−16 size and TB2 on PG20−28 and
PM16−28 size units)
This circuit board provides a connection point between the major
control boards and a majority of the field-installed accessories. (See
Fig. 43 and Table 26.)
17
J10
SEPARATION OF CIRCUITS TO EACH 24V TRANSFORMER MUST BE MAINTAINED
1 2 3 4 5 6
14
J11
7 8 9 10 R Y1 Y2 W1 W2 G
Fig. 43 − Low−Voltage Terminal Strip
Table 26 – Field Connection Terminal Strip
The circuit breakers for the low voltage control transformers,
interface connection for the Carrier Comfort Network (CCN)
communication, and interface connection for the Local Equipment
Network (LEN) communications are also located on the low
voltage terminal strip.
7
7
RUN TEST
J12
T55
FIRE SHUTDOWN
C X 1 2 1 2
76
J13
8
(+) (COM) (-) SHIELD
FAN STATUS
CCN
3 1 2
LEN
CCN