Huawei ECC800 User Manual page 79

ECC800 Data Center Controller
User Manual
COM Port
Figure 3-43 COM port pins
Table 3-65 COM port pin definitions
Pin
1
2
3
4
5
6
7
8
DI and DO Ports
Table 3-66 DI and DO port pin definitions
Pin
1
2
3
Issue 02 (2019-02-28)
Signal
RS485+
RS485–
NC
RS485+
RS485–
GND
NC
NC
Definition Signal
Description
+ Dry contact
input signal
–
NO Dry contract
Copyright © Huawei Technologies Co., Ltd.
Description
Two cascaded RS485
communication ports
Status Description
 Open: The dry
contact input is
open.
 Closed: The dry
contact input is
closed.

Open: The dry
3 Device Description
Initial Remarks
Status
Open Dry contact
input and
output signal
Open
70