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Central Control Device (Touch Screen Controller)
When using a relay for the circuit on the equipment side of the state output
IMPORTANT
Be sure to connect freewheeling diodes to both ends of the relay coil. (A relay with a built-in diode is recommended.)
35 mA or less
35 mA or less
Wiring connections
This section shows wiring connection examples with the indoor units, power meter interface, digital I/O interface, and remote
monitoring PC.
Air conditioning unit group settings
• Indoor units can be set together for each group unit.
• Groups 1 to 64 correspond to the central control addresses 1 to 64 of the indoor units.
• There is a LINK 1 and a LINK 2 for each TU2C-LINK communication line.
If only U Series outdoor units are connected, each line has 128 groups. LINK1 and LINK2 together have 256 groups and 256
zones.
When outdoor units other than the U Series are connected, each line has 64 groups. LINK1 and LINK2 together have 128
groups and 128 zones.
*When an outdoor unit other than the U series is connected to either line, it is set when an outdoor unit other than the U series
is connected on both lines.
Interface connection
Connect the power meter interface and the digital I/O interface to the RS-485 cable line. For details of the connection method
refer to the interface installation manual.
When using the power meter, connect the power meter separately for each device.
• Multi air conditioners for buildings
• Light Commercial
• Room Air Conditioner (home) (RAC TU2C-LINK I/F connection * For use outside Japan only)
• Air to Water Heat Pump (Hot water supply)
• Air to Water Heat Pump (Air conditioning)
• Air to Water Heat Pump (Air conditioning and Hot water supply)
• General purpose device control interface, External device
18
-EN
(Locally procured)
DO1
DO2
Output common
External power
supply
X2
X1
Installation Manual
Customer's equipment
X2
(digital input)
X1
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