Edgeport Industrial Installation Guide (90000409 Rev. C) – Page 3
Figure 1: Two Position DIP Switch
1 2
DS1:
h
ON signal ground short to chassis
ground
i
OFF signal ground isolated from chassis
ground
DS2:
not used
Configuring the DIP Switches
Two Position Switch
The two position DIP switch, located on the back
panel, connects the signal ground to chassis
ground.
IMPORTANT
: Do not connect signal ground
to chassis ground on more than one location in
order to prevent ground loops and potentially high
currents (figure 1).
Eight Position Switch
The Edgeport/2i also has two sets of eight position DIP
switches, located on the back panel next to their corresponding
serial port. Figure 2 shows what each switch selects in the ON
and OFF positions. Consult the diagrams in figure 3 for various
configuration options. For more configuration information, go to
the documentation section of our web site at
www.ionetworks.com/support. After configuration, you may
proceed to “Edgeport Driver Installation” on page 8.
If the drivers are not already installed, go to "Edgeport Driver Installation” starting on page 8.
Figure 2: Eight Position DIP Switch
1 2 3 4 5 6 7 8
h
ON
i
OFF
1. echo disabled 1. echo enabled
2. half duplex 2. full duplex
3. terminating 3. no terminating
resistor resistor
4. ---------- 4. set to OFF
5. set to ON 5. ----------
6. set to ON 6. ----------
7. not used 7. not used
8. not used 8. not used
Figure 3: Various Configurations for the Edgeport/2i DIP Switches
i
i
o
i
h
h
X X
Option #1: RS-422 to RS-422
o
h
h
i
h
h
X X
Option #2: RS-485 Half Duplex
End Unit with Terminating Resistor
o
h
i
i
h
h
X X
Option #3: RS-485 Half Duplex
Middle Unit
i
h
h
i
h
h
X X
Option #5: RS-485 Full Duplex
End Unit, Slave
i
i
i
i
h
h
X X
Option #6: RS-485 Full Duplex
Middle Unit, Master
i
i
h
i
h
h
X X
Option #4: RS-485 Full Duplex
End Unit, Master
i
h
i
i
h
h
X X
Option #7: RS-485 Full Duplex
Middle Unit, Slave
Key:
h
on
o
user’s chioce
i
off X doesn’t matter
