1. Connect one end of the network cable to the RS485-OUT port on the
temperature and humidity sensor.
2. Connect the other end of the network cable to the COM1/AIDI_1, COM3/
AIDI_3, COM5/AIDI_5, or COM7/AIDI_7 port on the UIM20A expansion
module.
– Temperature and humidity sensors can be cascaded through the RS485-IN and
RS485-OUT ports. A maximum of eight temperature and humidity sensors can be
cascaded.
– A maximum of four temperature and humidity sensors can be connected to the
UIM20A expansion module. Temperature and humidity sensors need to be
connected to the COM1/AIDI_1, COM3/AIDI_3, COM5/AIDI_5, and COM7/AIDI_7
ports on the UIM20A expansion module in sequence.
----End
4.3.6.3 Connecting a Monitoring Cable to the Hydrogen Detection System
Prerequisites
The RS485 monitoring cable is prepared.
Procedure
Step 1 Connect one end of a common network cable to the hydrogen detection system
RJ45 RS485 port.
Step 2 Connect the other end to the COM port on an ECC800-Pro collector or a UIM20A
expansion module.
----End
4.3.6.4 Connecting a Monitoring Cable to the Smoke Sensor
Prerequisites
A monitoring cable required is prepared.
Context
When connecting the smoke sensor and the ECC800-Pro collector or the UIM20A
expansion module, you need to perform the following steps to prepare a special
monitoring cable.
Procedure
Step 1 Prepare an RJ45 connector on one end of the network cable by following to the
instruction in Preparing a Monitoring Cable.
Step 2 Short-circuit core wires 1 and 8 on the other end of the network cable.
Step 3 Connect the core wires of the network cable to the cables for the smoke sensor,
based on the mappings in Table 4-41.
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. 117
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