Connecting the T/H Sensor Outside the Cabinet
Context
T/H sensors outside the cabinet are configured to detect the temperatures of cold/hot aisles. They can be flexibly installed on the server cabinet based on onsite situation. It is recommended that the T/H sensors be deployed near heat sources in the hot aisle, or in places which lacks cooling air in the cold aisle. The T/H sensors outside the cabinet must be near the smart cooling product to sense the temperature of the outlet air, and must be away from the air exhaust vents of other smart cooling products.
Procedure
- Connect the T/H
sensors outside the cabinet and the T/H sensors at the return air
side in series. Figure 3-58 shows how to route the
cables.
- The T/H sensors inside the cabinet are secured at the return air side and their IN ports are connected to the main control board. When connecting the T/H sensors outside the cabinet, connect the OUT port of one T/H sensor inside the cabinet to the IN port of the next T/H sensor outside the cabinet. Connect all T/H sensors in series in this way.
- The T/H sensors should be 1.5 m above the ground (33 U).
- Each smart cooling product supports a maximum of ten T/H sensors.
- Set the DIP switches of T/H sensors. Figure 3-59 shows a T/H sensor. Table 3-13 shows how to set the DIP switches for T/H sensors.
Table 3-13 DIP switch setting on a T/H sensor
Location Display Name
Address
DIP Switch Sequence No.
1
2
3
4
5
6
Air return side
Return air 2 temp/humid
1
ON
OFF
OFF
OFF
OFF
OFF
Cold aisle
Cold aisle 1 temp/humid
11
ON
ON
OFF
ON
OFF
OFF
Cold aisle 2 temp/humid
12
OFF
OFF
ON
ON
OFF
OFF
Cold aisle 3 temp/humid
13
ON
OFF
ON
ON
OFF
OFF
Cold aisle 4 temp/humid
14
OFF
ON
ON
ON
OFF
OFF
Cold aisle 5 temp/humid
15
ON
ON
ON
ON
OFF
OFF
Hot aisle
Hot aisle 1 temp/humid
21
ON
OFF
ON
OFF
ON
OFF
Hot aisle 2 temp/humid
22
OFF
ON
ON
OFF
ON
OFF
Hot aisle 3 temp/humid
23
ON
ON
ON
OFF
ON
OFF
Hot aisle 4 temp/humid
24
OFF
OFF
OFF
ON
ON
OFF
Hot aisle 5 temp/humid
25
ON
OFF
OFF
ON
ON
OFF
- The default addresses of T/H sensors purchased from Huawei are 1.
- Keep the last RS485_R toggle switch at OFF.
- After the addresses are set, power on the device. On the display's home screen, choose , and set the sensors in the aisles corresponding to the addresses to Enable. Otherwise, the sensors will not work.
