55
Connecting serial line RS485
This accessory allows connecting the air conditioning unit to a serial line RS485 supervision network. It must also be used
to install the remote terminal accessory.
Mounting
Connect the accessory to the four-pole socket base at the lower right angle of the module with display and keyboard. Use
the 4-cable connector supplied. Connect to the supervising system as indicated in the drawing below.
The series should be terminated by connecting a 120-ohm 1/4W resistor between terminals TxRx+ and TtxRx-.
Attention:
- Secure the device inside the electric panel so as to avoid accidental disconnection.
- Interconnect after having turned power supply off first.
- Keep the serial connection cables away from the power supply cables.
31
RS485 SERIAL LINE
CONNECTION
5
5
75
85
31
24
1/4w
1000
m
PC485KIT00
120
�
GND
T+
T-
1
N
Posistion of
internal jumper
GND
T+
T-
GND T+ T-
GATEWAY
PC
Maximum distance supervision
1000 m. (insert a 120-ohm 1/4W resistor in the last RS485 connection)
Speed
19.200 bauds
Cable characteristics
2 stranded cables with shielding
Cable section
AWG22 (0.35 mm
2
)
