Huawei iMaster NetEco V600R021C10 Device Installation And Commissioning Manual page 306

iMaster NetEco
Device Installation and Commissioning Guide (Data
Center)
Pay attention to the negative and positive polarities of the power supply. If the
polarities are connected incorrectly, the device may be burned.
Figure 7-12 Connecting cables
(1) PE
(4) Output ports for
hydrogen sensor 1 to
hydrogen sensor 4
(7) RS485
Table 7-18 Pin mapping for the RS485 port
Pin
Pin 1 (orange-white)
Pin 2 (orange)
Pin 3 (green-white)
Pin 4 (blue)
Pin 5 (blue-white)
Issue 02 (2021-05-12)
D ANGER
Copyright © Huawei Technologies Co., Ltd.
(2) AC IN
(5) Hydrogen
concentration alarm
port, fan alarm port, and
hardware fault port
(reserved ports)
Signal
D+
D-
12V+
NC
NC
7 Device Maintenance
(3) Output ports for fan
1 to fan 4
(6) RS485+, RS485-,
GND, and idle ports
(reserved ports)
Function
RS485+
RS485-
12+ input
-
-
295