Connection Procedure For The Ac Unit; Connection Procedure For Modbus - HMS Networks Intesis IN770AIR00XO000 User Manual

Hitachi VRF 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 Hitachi air conditioning network bus (H-Link) to the gateway using the A1 and A2 poles of the
AC-Port A.
NOTE
There is no polarity to observe.
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.
NOTE
Some devices detect the difference automatically and adjust themselves.
NOTE
When commissioning the gateway for the first time, DHCP will be enabled for 30 seconds. During
that time, if there is a DHCP server, an IP address will be automatically assigned to the gateway. If
there is no DHCP, you can type an IP address of your choice. After that time, the default IP address
192.168.100.246 will be automatically set.
IMPORTANT
If communicating through the LAN of the building, contact the network administrator and make sure
traffic on the used port is allowed through all LAN paths.
Page 12 of 38
to the installation grounding.
10).
Connection
USER MANUAL Version 1.0.6