JANOS Help System: [Commands] [Topics] [Tech Support] [Printable Manual] [Search]
COM Serial Port Both the COM and AUX (when present) serial ports use a D-sub DB-9F connector defined to be compatible with a a simple M-F DB9 extension cable and connection to a standard PC serial port. Since the latter is rare these days a USB-to-Serial adapter with DB-9M connector can make the connection. The RS-232 COM port, located at the bottom of the JNIOR next to the LAN Ethernet port, supports a 3-wire serial connection. The default is 115,200 Baud using 8 Data bits, 1 stop bit and no parity. Only software flow control is available. Flow control is disabled by default. ---------COM--------- \ (5) (4) (3) (2) (1) / DB9F Connector Front View \ (9) (8) (7) (6) / ----------------- Pin Assignments Pin 2 - Transmit Out (Tx) Active driver output from JNIOR Pin 3 - Receive In (Rx) from remote system Pin 5 - Ground reference (GND) other - No connection. NOTES The GND is not equivalent to the (-) negative power input in all models except the 412DMX (which requires DC power). This GND floats somewhere between the (+) positive and (-) negative power connections. The JNIOR serial ports are not isolated. Care should be taken not to create unwanted ground loops. SEE ALSO HELP Topics: MODELS, AUX_PORT, IOLOG [/flash/manpages/hardware.hlp:180]