Connection Procedure For The Ac Unit; Connection Procedure For Modbus - HMS Networks Intesis IN770AIR00 O000 Series User Manual

Samsung NASA with KNX, Serial and IP support
IMPORTANT
• When using a DC power supply: Respect the polarity labeled on the power connector for the
positive and negative wires.
• When using an AC power supply: Ensure the same power supply is not powering any other
device.
IMPORTANT
• Use SELV-rated NEC class 2 or limited power source (LPS) power supply.
• Respect the polarity.
• Connect the gateway's ground terminal
• A wrong connection may cause earth loops and damage the Intesis gateway and/or other system
equipment.

5.2.2. Connection Procedure for the AC Unit

Connect the Samsung air conditioning network bus (R1/R2) to the gateway using the B1 and B2 poles of the
AC-Port B.
IMPORTANT
Samsung NASA AC network allows automatic and manual addressing. For the proper communication
of this Intesis gateway, a Samsung installer must set up the indoor and outdoor units' manual
addressing through the remote controller or DIP switches (for indoor units) and through DIP
switches (for outdoor units).
IMPORTANT
Samsung NASA indoor units must be configured to accept central control. To do so, segment 5 of the
installation option code must be set to 1.
IMPORTANT
Observe polarity
NOTE
See the Wiring diagram (page

5.2.3. Connection Procedure for Modbus

For Modbus TCP:
Connect the Modbus TCP Ethernet cable to the gateway's Ethernet Port. The correct cable to use depends on
where the gateway is connected:
• Connecting directly to a Modbus TCP device: use a crossover Ethernet UTP/FTP CAT5 or higher cable.
• Connecting to a hub or switch of the LAN of the building: use a straight Ethernet UTP/FTP CAT5 or higher
cable.
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to the installation grounding.
10).
Connection
USER MANUAL Version 1.0.6