Huawei iMaster NetEco V600R021C10 - Connecting the Fresh Air Unit Monitoring Cable; Connecting a Monitoring Cable to the Fresh Air Unit

Step 2 (Optional) Connect PDU2000 cascading cables. Use a common network cable to
connect port COM1 or COM2 on the PDU2000 to port COM1 or COM2 on another
PDU2000.
NO TE
● A maximum of four PDU2000s can be cascaded.
● If PDU2000s are cascaded, you need to connect only one PDU2000 to the ECC800-Pro
collector.
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4.3.11 Connecting the Fresh Air Unit Monitoring Cable
4.3.11.1 Connecting a Monitoring Cable to the Fresh Air Unit
Prerequisites
A network cable used for monitoring is prepared.
Procedure
Step 1 Connect core wires 1 (orange-white) and 2 (orange) at one end of the network
cable to pins 81 and 83 of the fresh air unit controller respectively.
NO TE
Pin 81 is dened as RS485+, and pin 83 is dened as RS485–.
Figure 4-59 Positions of pins 81 and 83
Step 2 Connect the other end of the network cable to the COM port on the ECC800-Pro
collector or the UIM20A expansion module.
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iMaster NetEco
Device Installation and Commissioning Guide (Data
Center) 4 Connecting Monitoring Cables to Devices
Issue 02 (2021-05-12) Copyright © Huawei Technologies Co., Ltd. 132