Trane CXAJ series - Page 39

39
Module Control System
Wiring Diagram of Centralized Controller
TRANE ADC_OT03 VER1.00
CN2
SW2
C15
U6
R26
+9~12V
GND
+V
ON
ON
RUN-IN
CN5
PUMP
B
A
+VBA
gnd
13
TH1
CN2
CN6
TH4TH2
TH3
SW2
TH5
TH6
CN1
NEGETIVE
LINE
COMP1
SW1
HT/EV1 COMP2
4WV1
A-HAT
4WV2
B
A
LINE
NEGETIVE
OV-PUMP
B
G
B
G
A
CN5
CN4
A
OV-COMP2
HP1
LP1
OV-COMP1
OV-FAN
M/FAN2
H/FAN1
RUN-IN
AL-OUT
AL-IN
RUN-OUT
ADC_OD_CO1
FLOW
OVHT/HP2
FREZ/LP2
C/H
N-COM
EN-SAVE
TH4
CN6
CN2
TH2
TH1
TH3
SW2
A
G
B
A
CN4
TH5
TH6
4WV1
CN1
SW1
COMP1 COMP2
HT/EV1
A-HAT
4WV2
PUMP
H/FAN1
M/FAN2
A
B
TH1
G
B
LP1
HP1
OV-COMP2
OV-FAN
OV-COMP1
CN2
CN6
FLOW
OV-PUMP
C/H
FREZ/LP2
OVHT/HP2
ADC_OD_CO1
AL-OUT
RUN-OUT
AL-IN
EN-SAVE
N-COM
CN1
NEGETIVE
LINE
COMP1
TH3
TH2TH4
SW2
TH5
TH6
B
G
A
B
G
A
CN4
CN5
SW1
HT/EV1
COMP2
4WV1
PUMP
4WV2
A-HAT
M/FAN2
H/FAN1
RUN-IN
AL-IN
RUN-OUT
AL-OUT
ADC_OD_CO1
LP1
HP1
OV-COMP1
OV-FAN
OV-COMP2
OV-PUMP
FLOW
OVHT/HP2
FREZ/LP2
C/H
N-COM
EN-SAVE
Centralized Controller
MODULE
POWER
SHIELD LAYER
SHIELD LAYERSHIELD LAYER
Groundin
g
MODULE MODULE
Description of ground terminal for RS485 control wire
•
Forbid to be connected to the high voltage 220V ground wire terminal of the iron sheet for
the electric control box.
•
RS485 ground port G is the ground terminal of the DC power supply for the electric control
panel.
Installation requirements of RS485 communication cable
1. Requirements of communication line: RS485 wiring must be AWG 18-22, the line diameter
must be larger than 0.75 mm2, the twisted pair shall be provided with the shielding layer, and
the twist distance shall not be more than 5 cm. It is recommended to use BELDEN, 5320FE.
2. Requirements of hand by hand wiring: each system module is provided with two terminals A
and B for RS485 connection, and the module of the outdoor unit is provided with the terminal
G besides the terminals A and B for connecting the shielding layer of the communication
line. The shielded twisted pair must be wired hand by hand without star connection, i.e. 1 is
connected to 2, 2 is connected to 3, and 3 is connected to 4, which is correct; if 1 is connected
2, 2 is connected to 3, and 2 is connected to 4, it will be wrong.
3. Wiring requirements of shielding layer: after being twisted, the shielding layer is covered
with the adhesive tape to prevent from being connected with 220V ground wire, and one end
of the shielding layer is connected with the earth point G of the outdoor unit control cabinet.
When the module of the outdoor unit is connected, the shielding layer is connected to the
terminal G. Forbid to be connected to 220V ground wire terminal of the iron sheet for the
electric control box.
4. When the network is unstable, install the terminator (shipped with the Centralized Controller)
to the communication ports A and B of the last unit of the network.
Function of centralized controller
Introduction
Single-unit operation: the centralized controller can operate any single unit on the network, for
example, start up and shut down, change the mode, change the set temperature and so on.
Multi-unit operation: the centralized controller can start up and shut down all connected units on