Appendix a – sci protocol and interface – SIGMA MRX Series User Manual
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APPENDIX A – SCI PROTOCOL AND INTERFACE
A8
JUMPER SELECTION
SERIAL PORT COMMUNICATION FORMAT
RS-232 SELECTION
JP2, 9 position jumper with header attached, factory default.
RS-422/485 SELECTION
JP1, 9 position jumper, move header from JP2 to this position for RS-422/485.
J4, RS-422/RS-485 selector, factory default is RS-422
J5, Delete for RS-422 and RS-232 (factory default), Add for RS-485
J6, Delete for RS-422 and RS-232 (factory default), Add for RS-485
Reserved Function
JP3, programming interface for U6 (factory reserved)
9 PIN 'D' RS-422/485 WIRING
PIN
#
FUNCTION
∗
DIRECTION
1
Ground
----
2
Transmit A
Output ( TX Data - )
3
Receive B
Input ( RCV Data + )
4
Receive Common
----
5
N/C
----
6
Transmit Common
----
7
Transmit B
Output ( TX Data + )
8
Receive A
Input ( RCV Data - )
9
Frame Ground
----
∗
(Same as standard: ANSI/SMPTE 207M/1984)