Owner`s manual

Connectors for System Control
Control Port (RS-232) Connector (DB-9F)
The Control Port is designed to connect directly to any control system or computer that has a standard RS-232 serial port.
A cable (not supplied) is needed to connect the Control Port to the control system or computer serial port. The Control Port has a DB-
9-F (female) connector – the connector pinout is defined below. Typically, only three wires are needed: TX, RX, and Ground. If your
serial port expects handshake inputs (on CTS, DSR, and/or DCD), you may be able to either change your port configuration to ignore
these signals, or you may provide either the 5V or 12V signals from the Vaux Control connector to drive them active.
Pin Vaux Control Port Signal Direction Standard Computer Port
1 5VDC (note 1) -> DCD (Data Carrier Detect)
2 DATA_OUT -> RXD (Receive Data)
3 DATA_IN <- TXD (Transmit Data)
4 PAGE_PB_IN (note 2) <- DTR (Data Terminal Ready)
5 Signal Ground — Signal Ground
6 12VDC (note 1) -> DSR (Data Set Ready)
7 [do not use] <- RTS (Request To Send)
8 [do not use] -> CTS (Clear To Send)
9 SYS_ACTIVE_OUT (note 3) -> RI (Ring Indicator)
· Typical Connections: Data-In (TXD), Data-Out (RXD), and Signal Ground.
· Minimal Connections: Data-In (TXD), and Signal Ground (for commands only)
· The DB-9 shield rim (the “D”) is connected to signal ground.
· Note 1: If CTS, DSR, or DCD is needed by your serial port, connect to the 5V or 12V signal (1-mA max load).
· Note 2: for IP switchers and LE-400A: PAGE_PB_IN (see I/O Port description, below); for other systems: do not use
· Note 3: for IP switchers and LE-400A: SYS_ACTIVE_OUT (see I/O Port desc, below); for other systems: do not use
The serial port requires 38400-baud, 8 data bits, no parity, 1 stop bit, with Xon/Xoff flow control
enabled. 38400 is recommended, but 1200 to 115200 is available via a configuration command.
The baud-rate may field-configured to 9600-baud for control systems that cannot communicate at 38400.
To set 9600-baud:
Turn off switcher, press and HOLD the Memory-Erase pushbutton,
Turn switcher back on, holding button until PROG light goes off, then release button. The PROG light will
flash and then the light-bar will indicate system is running -- serial port is now at 9600-baud.
To return to 38400-baud, you must use the config command (*PW,250), or restore factory settings:
While system is running, press and release the Memory-Erase pushbutton. The PROG light will turn on
for a couple of seconds while settings are restored, and then the light-bar will indicate system is
running -- serial port is now at 38400-baud, and all other factory settings are restored (initial turn-on volumes...).
The baud-rate setting is saved in non-volatile memory.
Lattis Matrix Switcher 44 Software Version 7.3.0.0