HMS Netbiter EasyConnect User Manual page 16

Connections
2.4.3 RS-485 Serial Interface (3-pin Connector)
The RS‐485 serial interface can be used to connect Modbus devices.
Pin
A
B
COM
2.4.4 RS-232 Serial Interface (3-pin Connector)
The RS‐232 serial interface can be used to connect a single Modbus device.
Pin
Rx
Tx
GND
2.4.5 Ethernet Connectors (RJ-45)
WAN:
LAN:
Link activity indicators
Protective Earth
!
Do not connect the LAN and WAN ports to the same physical network.
Netbiter EasyConnect Gateway User Manual
3-pin RS-485 connector
A B COM
Function
RS-485 Line A
RS-485 Line B
ISO GND (Isolated ground)
3-pin RS-232 connector
Function
Rx Receive input
Tx Transmit output
Signal ground
For connecting to the Internet and Netbiter Argos.
For EtherNet/IP, Modbus TCP, and Remote Access.
WAN
LAN
Rx Tx GND
GPS antenna connector (Netbiter EC350 only)
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Doc: HMSI-168-92 Rev: 3.10