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ioPAC 8500 Hardware
Installation
2-12
Port Trunking
The ioPAC 8500 RTU controller has a Port Trunking function (active backup mode) that can convert two
LAN-port IP addresses into one virtual IP address for easy SCADA integration and Ethernet redundancy. In the
following diagram, both LAN ports on each ioPAC RTU controller are connected to a managed switch on an
Ethernet network running SCADA software. For more details regarding configuration setup, refer to the ioPAC
RTU Software User’s Manual.
Serial Connectivity
Connecting to a Serial Device
The ioPAC RTU is equipped with two 3-in-1 serial ports that support RS-232/422/485, making it more
convenient to connect field serial devices.
Pin RS-232
RS-422 and 4-wire RS-485
2-wire RS-485
1
DCD
TxD-(A)
–
2
RXD
TxD+(B)
–
3
TXD
RxD+(B)
Data+(B)
4
DTR
RxD-(A)
Data-(A)
5
GND
GND
GND
6
DSR
–
–
7
RTS
–
–
8
CTS
–
–
9
RI
–
–