Huawei ECC800 User Manual page 76

ECC800 Data Center Controller
User Manual
COM Port
Figure 3-40 COM port pins
Table 3-58 COM port pin definitions
Pin
1
2
3
4
5
6
7
8
DI and DO Ports
Table 3-59 DI and DO port pin definitions
Pin
1
2
Issue 05 (2019-09-16)
Signal
RS485+
RS485–
NC
RS485+
RS485–
GND
NC
NC
Definition Signal
Descriptio
n
+ Dry contact
input signal
–
Copyright © Huawei Technologies Co., Ltd.
Description
Two cascaded RS485
communication ports
Status Initial
Descriptio Status
n

Open: Open
The dry
contact
input is
open.
 Closed:
The dry
3 Device Description
Remarks
Dry contact
input and
output signal
66