IG-150-EN version 04; 03/10/16
38
Hardware General instructions
ekor.rps
2.5. RS485 connection detail between some units
Although there is an internal connection in the unit
between 1 and 2 pin and between pin number 3 and 4, if
a connection is done on the bus side, as it is shown in the
gure, a unit can be removed without causing a loss in the
chain continuity.
1
2
3
5
6
7
7
7
8
3
2
4
2
2
2
2
1
Computer
2
Screen
3
Network end R 120 Ohms
4
DB9 Female type rear connector (in the unit)
5
Screened twisted pair
6
Last unit
7
ekor.rps unit
8
Rest of DB9 connector terminals without inner connection
Figure 2.10. RS485 connection
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