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MTX-DIN Family
www.mtxm2m.com
2015/10 v2.3
Page
44
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103
MTX M2M® by MATRIX ELECTRONICA S.L.U
4.2.3
Main RS232/RS485/RS422 interface (ASC0)
The MTX-DIN modems have a standard RS232/RS422/RS485 main serial interface connected to the
ASC0 module’s UART. The operating mode of this port can be configured by hardware through the
internal jumpers JPc1 and JPc3. To access them you must open the device enclosure. Below you can
find the board overlay to locate these jumpers:
The following table shows the jumpers’ positions to choose between different port modes:
Mode
JPc1
JPc3
RS232 (4 wi re)
JP 1-2: Open
JP 3-4: Open
JP 5-6: Cl os ed
JP 7-8: Cl os ed
JP 1-2: Open
RS485 (no termi na ti on)
JP 1-2: Open
JP 3-4: Open
JP 5-6: Open
JP 7-8: Open
JP 1-2: Cl os ed
RS485 (120Ω termi na ti on)
JP 1-2: Cl os ed
JP 3-4: Open
JP 5-6: Open
JP 7-8: Open
JP 1-2: Cl os ed
RS422 (no termi na ti on)
JP 1-2: Open
JP 3-4: Open
JP 5-6: Cl os ed
JP 7-8: Open
JP 1-2: Cl os ed
RS422 (120Ω termi na ti on)
JP 1-2: Cl os ed
JP 3-4: Cl os ed
JP 5-6: Cl os ed
JP 7-8: Open
JP 1-2: Cl os ed