Common Connections; Connecting The Gateway To The Power Supply; Connecting The Gateway To The Air Conditioning System - HMS Networks Intesis IN770AIR00XO000 User Manual

Hitachi VRF with KNX, Serial and IP support

5.2.2. Common Connections

5.2.2.1. Connecting the Gateway to the Power Supply

The power supply connector is a green pluggable terminal block (3 poles) labeled as Power.
IMPORTANT
• Use SELV-rated NEC class 2 or limited power source (LPS) power supply.
• Connect the gateway's ground terminal to the installation grounding.
• A wrong connection may cause earth loops that can damage the Intesis gateway and/or any other
system equipment.
Apply the voltage within the admitted range and of enough power:
• For DC: 12 .. 36 VDC (+/-10%), Max: 250 mA
• For AC: 24 VAC (+/-10 %), 50-60 Hz, Max: 127 mA
Recommended voltage: 24 VDC, Max: 127 mA
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.

5.2.2.2. Connecting the Gateway to the Air Conditioning System

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 be respected.
NOTICE
See the wiring diagram in the gateway connectors figure:
(page 10).
Page 12 of 37
General view of all gateway connectors
USER MANUAL Version 1.0.0
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