Operating instructions

1892 1335 - Orion Radio Modem Operating Instructions - v2.9 / Aug 2009 33
Serial Port A: User Data and AT Command interface
RJ45 8-way female connector
The interface is soft-configured to be RS232, RS422 or RS485 using command ATB2.
RJ45 pin no: 1 2 3 4 5 6 7 8
RS232 NC NC DTR** 0V RD out TD in* CTS out RTS in
†
RS422 NC NC DTR** 0V
RD out - (Z)
TD in +
(A)
RD out + (Y)
TD in -
(B)
RS485 NC NC DTR** 0V Data i/o (B) NC Data i/o (A) NC
*Also Data In for Data Sampling Mode (TR)
** DTR must be high or o/c to operate; DTR low holds the Orion in a power-off state
†
Also assert (pull to low or 0V) to transmit for Data Sampling Mode (TR)
Serial Port B: Telemetry (I/O, SCADA) and AT command Interface
RJ45 8-way female connector
The interface operates only on RS232.
Serial B 1 2 3 4 5 6 7 8
RS232 N/C N/C N/C 0V Rdout Tdin CTSout RTSin
Serial Connection to PC
To connect a GUI to the Orion, use a cable of this pattern between the COM port of the PC
and Serial Port B. (Serial Port A cannot be used for this purpose).
To use AT commands (for example, using a terminal or PC terminal emulator), use a cable of
this pattern between the PC and either Serial Port A (configured for RS232) or Serial Port B.
Figure 11 - PC to Serial Port cable
This cable cannot be used with Serial Port A if it is configured for RS422 or RS485 working:
in this case, the PC must be connected to it with the corresponding connections shown in the
table above, and must communicate with it using the matching protocol.