Huawei ECC800 User Manual page 77

ECC800 Data Center Controller
User Manual
COM Port
Figure 3-41 COM port pins
Table 3-60 COM port pin definitions
Pin
1
2
3
4
5
6
7
8
DI and DO Ports
Table 3-61 DI and DO port pin definitions
Pin Definition
1 +
–
2
Issue 07 (2020-03-16)
Signal
RS485+
RS485–
NC
RS485+
RS485–
GND
NC
NC
Signal
Description
Dry contact
input signal
Copyright © Huawei Technologies Co., Ltd.
Status Initial Status
Description
 Open: The Open
dry contact
input is
open.
 Closed: The
dry contact
input is
3 Device Description
Description
Two cascaded RS485
communication ports
Remarks
Dry contact
input and output
signal
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