Huawei ECC800 User Manual page 85

ECC800 Data Center Controller
User Manual (for ECC800-Pro)
COM Port
Figure 3-49 COM port pins
Table 3-74 COM port pin definitions
Pin
1
2
3
4
5
6
7
8
DI and DO Ports
Table 3-75 DI and DO port pin definitions
Pin
1
2
3
Issue 06 (2020-04-22)
Signal
RS485+
RS485–
NC
RS485+
RS485–
GND
NC
NC
Defini Signal
tion Descriptio
n
Dry contact
+
input signal
–
Dry contract
NO
Copyright © Huawei Technologies Co., Ltd.
Status Description
 Open: The dry contact
input is open.
 Closed: The dry
contact input is closed.
 Open: The dry contact
3 Device Description
Description
Two cascaded RS485
communication ports
Initial Descriptio
Status n
Dry contact
Open
input and
output
signals
Open
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