MTX-DIN Family
www.mtxm2m.com
2015/10 v2.3
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MTX M2M® by MATRIX ELECTRONICA S.L.U
4.2.4
Secondary RS232/RS485/RS422 interface (ASC1)
The MTX-DIN modems have a standard RS232/RS422/RS485 secondary serial interface connected to
the ASC1 module’s UART. The operating mode of this port can be configured by hardware through
the internal jumpers JPc2 and JPc4. 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:
d
Mode
JPc2
JPc4
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