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JP7: COM2 use RS-232 or RS-422/485 Select
Options
RS-232 (default)
RS-485 Transmit Only(*1)
RS-485 by RTS (*1)
RS-422/485 Full Duplex (*2)
NOTE:
*1: 2-wires RS-485 function
*2: 4-wires point-to-point full duplex function
4-wires point-to-point full duplex RS-422/485
Typical RS-485 2-wires Mutildrop Network
3.11 Ethernet Connector
The HS-7280 provides two RJ-45 connectors for 10/100/1000 Based
LAN. Please refer to the following for its pin information.
JP13: Onboard LAN1 Enabled/Disabled Select
Options
Enabled (default)
Disabled
CN13/CN14: RJ-45 Connector
PIN Description PIN Description
1
MDI0+
3
MDI1+
5
N/C
7
MDI2+
9
MDI3+
14
Settings
Open
Short 1-2, 3-4, 5-7, 8-10
Short 1-2, 3-4, 7-9, 8-10
Short 1-2, 3-4, 6-8
Settings
Open
Short
2
MDI0-
4
MDI1-
6
330Ω pull 3.3V
8
MDI-2
10
MDI3-
9
1
10
2
1
2
10
1
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