RS485/RS422
Wieland Electric GmbH | BA000917 | 01/2019 (Rev. B)
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8
RS485/RS422
8.1
RS485/RS422 description
The expansion port RS485/RS422 is created as an expansion board which enables the use
of the next hardware interface of Wieland modems or routers for next signal processing.
This interface is physically connected on RJ45 connector on appropriate modem or rout-
ers.
The expansion port RS485/RS422 can be selected via jumpers interface RS422 or RS485.
Power port can also be selected using jumpers on the board expansion port. Description of
the interface and an external or internal power supply selecting, see chapter "Interface and
power supply selection".
Expansion port RS485/RS422 is possible fitted into PORT1 and PORT2.
8.2
Interface and power supply selection
External or internal power supply of module Expansion port RS485/RS422 can be made by
wiring jumpers J2 and J3 on this module. If an internal power supply of the module is re-
quired, jumpers J2 and J3 must be connected to pins 2 - 3. External power supply is made
by connecting pins 1 - 2 with jumpers J2 and J3.
Interface behaviour of module Expansion port RS485/RS422 can be made by wiring jump-
ers J4, J5 and J6 on this module. If RS485 is required, jumpers J4 and J5 must be con-
nected and jumper J6 disconnected. If RS422 is required, jumpers J4 and J5 must be dis-
connected and jumper J6 connected.
Jumper placement can be seen in the diagram below (module Expansion port
RS485/RS422 from TOP layer). We recommend that internal power supply is only chosen
in the event that it is not possible to ensure external power supply. If internal power supply
is chosen, converter RS485/RS422 is not galvanically separated.
NOTICE
Figure 17: The jumper
(default jumper posi-
tion) cicuitry for exter-
nal supply (left) and for
internal supply (right)
