Huawei NetCol5000-A021HN12D 20020E1 Quick Manual page 17

1. Connect signal cables.
• (RS485 connection) Connect one end of the signal cable to ports 1, 2 and 3 of the terminal
with the X302 silk screen on the electrical control box, and connect the other end to ports 3, 4
and 5 on the outdoor unit.
• (Dry contact connection) Connect one end of the signal cable to ports 1 and 2 of the terminal
with the X301 silk screen on the electrical control box, and connect the other end to ports 1
and 2 on the outdoor unit.
2. Connect the two terminals of the water sensor cable to ports 7 and 8 of the terminal with the
X301 silk screen on the electric control box.
3. Bind the cables with cable ties.
RS485 connection
Top cabling
8.4
Connecting the Humidity and Temperature Sensor Outside the Cabinet
The humidity and temperature sensor must be
1.5 m above the floor. Connect the T/H sensor
outside the cabinet and the T/H sensor at the
return air side in series, and bound with cable
ties or other fasteners. Each smart cooling
product supports three humidity and
temperature sensors in cold aisles and the
other three in hot aisles at most.
Bottom cabling
16
Dry contact connection
Top cabling
For the
cold aisle
Bottom cabling
For
the
hot
aisle