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NTI AUDIO/HD VIDEO MATRIX SWITCH
RS232 Control
Remote Connection
The RS232 Interface is designed to control the switch via serial (RS232) daisy chain connection from any host computer or other controller with an RS232 communications port. There is, however, a restriction that must be followed:
A program must be used that will send an entire command line all at once, not character by character. (The HyperTerminal program in WINDOWS cannot be used, as it sends each character one at a time.)
The pin outs for the
RS232 Connector
PIN SIGNAL FUNCTION
1 | None | no connection |
2 | TXD | Transmit Data (RXD at host) |
3 | RXD | Receive Data (TXD at host) |
4 | DSR | Data Set Ready |
5 | GND | Signal Ground |
6 | DTR | Data Terminal Ready |
7 | CTS | Clear to Send |
8 | RTS | Request to Send |
9 | none | no connection |
On the
Baud Rate
The unit powers up with a default baud rate of 9600 and a fixed data protocol of 8 data bits, no parity and 1 stop bit. The baud rate can be changed by pressing the MENU button on the front panel keypad. Then select 1 for SET BAUD RATE and select the desired baud rate of 9600, 2400, 1200 or 300. A data protocol of 8 data bits, no parity, and 1 stop bit is used for communications.
Unit Address
To allow multiple units to be controlled from a single CPU port, the RS232 control interface is designed to allow "daisy chaining" up to 15 units using the NTI
RS232 | |||
CPU Serial Port |
|
|
|
RS232 | RS232 | RS232 |
NTI | NTI | NTI |
SWITCH | SWITCH | SWITCH |
First Unit | Second Unit | Last Unit |
Figure 7- RS232 connection with Matrix-Y-1 cable
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