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7 EXPANSION PORT RS485/RS422
7.1
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 physi-
cally connected on RJ45 connector on appropriate modem or routers.
The expansion port RS485/RS422 can be selected via jumper 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".
NOTICE
Expansion port 8 RS485/RS422 is only possible at PORT1 and PORT2.
7.2
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 required, 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 behavior of module Expansion port RS485/RS422 can be made by wiring jumpers J4, J5
and J6 on this module. If RS485 is required, jumpers J4 and J5 must be connected and jumper J6
disconnected. If RS422 is required, jumpers J4 and J5 must be disconnected and jumper J6 con-
nected.
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 possi-
ble to ensure external power supply. If internal power supply is chosen, converter RS485/RS422 is
not galvanically separated.
Figure 17: Jumper circuitry (default jumper position) for external supply (left) and for internal supply (right)
1 Jumper J3
Figure 18: Jumper circuitry (default jumper position) for RS485 (left) and RS422 (right)
3 Jumper J4
5 Jumper J6
Wieland Electric GmbH | BA000917 | 08/2021 (Rev. C)
1
2
3
4
Expansion port RS485/RS422
2 Jumper J2
5
4 Jumper J5
1
2
25
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