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FusionCol8000-E400 Modular Indirect Evaporative
Cooling System
User Manual
Table 2-5 Signal table
No.
1
2
3
4
5
6
7
8
Issue 04 (2022-06-30)
X501
Smoke sensor power
supply+
Smoke sensor
feedback–
Remote startup/
shutdown+
Remote startup/
shutdown–
Common alarm 1+
Common alarm 1–
Common alarm 2+
Common alarm 2–
Copyright © Huawei Technologies Co., Ltd.
X502
Water sensor
Water sensor
Fresh air damper 24 V
DC
Fresh air damper GND
Fresh air damper U
(feedback)
Fresh air damper Y
(control)
Reserved
Reserved
2 Product Description
X504
Outdoor exhaust air
damper 24 V DC
Outdoor exhaust air
damper GND
Outdoor exhaust air
damper U
(feedback)
Outdoor exhaust air
damper Y (control)
Indoor supply air
damper 24 V DC
Indoor supply air
damper GND
Indoor supply air
damper U
(feedback)
Indoor supply air
damper Y (control)
25
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