Huawei V100R001 - Conference Management

FusionModule5000 Smart Modular Data Center
Product Description (ECC800)
45
Table 3-19 COM port pin definitions
Pin
Signal
Description
1
RS485+
Two cascaded RS485
communication ports
2
RS485–
3
NC
4
RS485+
5
RS485–
6
GND
7
NC
8
NC
DI and DO Ports
Table 3-20 DI and DO port pin definitions
Pin
Definition
Signal
Description
Status Description
Initial
Status
Remarks
1
+
Dry contact
input signal
⚫
Open: The dry
contact input is
open.
⚫
Closed: The dry
contact input is
closed.
Open
Dry contact
input and
output signal
2
–
3
NO
Dry contract
output signal
⚫
Open: The dry
contact output is
open.
⚫
Closed: The dry
contact output is
closed.
Open
4
COM