Terminal Resistor Setting - Fujitsu AIRSTAGE J-II Design & Technical Manual

1-6.

TERMINAL RESISTOR SETTING

Be sure to set the terminal resistor according to specifications.
Set the terminal resistor for every network segment (NS).
● If terminal resistor is set in multiple devices, the overall communication system may be
damaged.
● If terminal resistor is not set in a device, abnormal communication may occur.
Be sure to set one terminal resistor in a network segment. You can set the terminal resistor
●
„
at the outdoor unit or signal amplifier.
When setting the terminal resistor of a signal amplifier, refer to the installation manual of the
●
„
signal amplifier.
When setting multiple terminal resistors, take note of the following items.
●
„
 How many network segments are there in a VRF system?
 Where will you set the terminal resistors in a network segment?
(Condition for 1 segment: Total number of outdoor and indoor units and signal amplifiers
is less than 64, or the total length of the transmission line is less than 500m)
 How many outdoor units are connected in 1 Refrigerant system?
From conditions
●
„
below.
DIP SW SET5-4 Terminal resistor
OFF
ON
SETTING EXAMPLE
„ „
Terminal resistor : ON
Slave2 Slave1 Master
Terminal resistor : OFF
Slave2 Slave1 Master
Slave2 Slave1 Master
Terminal resistor : ON
NS2 (Network segment 2)
 -  , set outdoor unit DIP switch SET5-4 in accordance with the table
Disable (Factory setting)
Enable
NS1 (Network segment 1)
Refrigerant system1 (Heat Recovery system)
Refrigerant system2 (Heat Recovery system)
Refrigerant system3 (Heat Pump system)
NS3 (Network segment 3)
- (07-56) -
Caution
Remarks
-
NS4 (Network segment 4)
About the setting of
terminal resistor
Outdoor unit (Master unit)
:ON
:OFF
Signal amplifier
Install
Do not install