Network Technologies SM-8X4-HDA RS232 Control, Remote Connection, Baud Rate, Unit Address

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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 DB-9 connector on the unit are as follows:

RS232 Connector (DB-9 FEMALE)

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 DB-9 female connector, pins 4 (DSR) and 6 (DTR) are shorted and pins 7 (CTS) and 8 (RTS) are shorted. Therefore, host handshaking is bypassed and TXD and RXD are the only active signals. A straight through DB-9 cable (not null modem) will work for most CPUs. To daisy chain multiple units, use NTI Matrix-Y-1 "Y" cables, except for the last unit connected. (see Fig 6). For a pinout of the Matrix-Y-1 cable, see page 31. For straight through cable pinouts applicable to various terminal types, see page 30.

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 Matrix-Y-1 "Y" cables (sold separately- pin out is on page 28). By setting the appropriate unit address with the keypad, each unit can be given a unique address (1-15). Then the unit will only respond to commands on the bus if its address is embedded in the command. To set the unit address select MENU on the front panel keypad. Then select 2 for SET UNIT ADDRESS and then type the address number (1-15) and (ENTER).

RS232

Matrix-Y-1

Matrix-Y-1

Matrix-Y-1

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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Contents SM-8X4-HDA Trademark Table of Contents Table of Figures Materials Default User Name and PasswordsIntroduction CablesFeatures and Functions FrontViewofVEEMUX-AInstallation Connect the SourcesConnect the Devices +L- R+RConnect RS232 Connect to the EthernetPower Up Plug in and power upEscape back to the main display Used to enter numbers. # Control OptionsFront Panel LCD with Keypad Control Output user number can be enteredMenu Button Volume ControlMemory Functions Saving ConnectionsScan Mode Baud Rate RS232 ControlRemote Connection Unit AddressCommand Protocol Command Good Response Description StringSerTest- RS232 Interface Test Program Main OptionsEthernet Operations Setup OptionsMatrix Operations Telnet 192.168.1.1 Command Reply DescriptionTelnet Interface NTI AUDIO/HD Video Matrix Switch Enter the Password Web InterfaceVideo Switch Web interface Video SwitchAudio Switch Web interface Audio SwitchSetup Pages Web interface SetupWeb interface Serial Setup Input NamesScan Mode Output NamesUpdate Firmware Web interface Update FirmwareHelp Change PasswordUpdate Web Server LogoutDevice Discovery Tool Device Discovery ToolKeypad Features And FunctionsInfrared Control LCD DisplayPower on with SYS, in or OUT keys Power on with 2 key How To Use The IRTChange the Switch Change Output Port Change Input PortSet Configuration Troubleshooting the IRT Battery ReplacementSpecifications Replace slide cover on unitPinouts for typical DCE to DTE cable for CPU connection RS232 Connection CablesPinout of RS232 port on VEEMUX-A Arrows indicate signal direction Safety StatementsWiring Schematic of Matrix-Y-1 cable Pinout for Matrix Y-1 CableRack Mounting Instructions Mount the VEEMUX-A to a rackSpecifications Problem TroubleshootingWarranty Information Solution