Huawei NetCol5000-A - Page 77

NetCol5000-A 42 kW Air Cooled In-row Precision Air
Conditioner
User Manual
3 Installation Guide
Issue 01 (2017-07-27)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
69
Figure 3-41 Connecting the outdoor unit on/off signal cable (RS485 connection)

(Dry contact connection) Connect one end of the cable to points 1 and 2 on the external
signal port X301 and the other end to ports 1 and 2 on the outdoor unit.