Extron electronic MKP 2000 SIS Operation, RS-232 Links, Ethernet Link, Host-to-MKP Instructions

SIS Operation

RS-232 Links

The MKP’s rear panel 3-pole, 3.5 mm, Host RS-232 connector (figure 4-1) can be connected to the RS-232 serial port output of a host device such as a computer running the HyperTerminal utility, an RS-232 capable PDA, or a control system. This connection makes software control of the control panel possible. The rear panel Switcher connector can be connected to the Remote or RS-232 port of a matrix switcher.

The default protocol for both ports is as follows:

•	9600 baud*			•	no parity
•	8-bit, 1 stop bit			•	no flow control
HOST	Tx	Pin Function
	Rx	TX	Transmit data
RS-232
	GND	RX	Receive data
SWITCH	Tx
	Rx	Gnd Signal ground
RS-232
	GND

Figure 4-1 — RS-232 connector pin assignments

*The default baud rate is 9600, but this can also be changed, using the MKP’s web pages, to 19200, 38400, or 115200 baud to match the switcher’s baud rate. See Port (RS-232) Settings in chapter 5,

HTML Operation, to change the baud rate.

Routing matrix switcher commands

When the MKP is connected to the matrix switcher via its Switcher RS-232 port, the MKP can redirect SIS matrix switcher commands received on the Host RS-232 port to the matrix switcher.

If the MKP receives a valid matrix switcher SIS command on its Host RS-232 port, it redirects the command to its Switcher RS-232 port only if the MKP is set to Pass-through mode. See the pass-through port redirect command set on page 4-8 to set the Pass-through mode.

Ethernet Link

The rear panel LAN connector on the MKP can be connected directly to a host computer (for set-up) or a matrix switcher (for switcher control) or to an Ethernet LAN or WAN (to which a host computer, other MKPs and a matrix switcher can also be connected).

•Connection directly to a host computer requires a crossover cable.

•Connection via an Ethernet LAN requires a patch (straight) cable.

See TP cable termination in chapter 2, Installation to create crossover and patch cables.

Default IP address

To access the MKP via the Ethernet port, you will need the Extron IP address. If the address has been changed to an address comprised of words and characters, the actual numeric IP address can be determined using the ping (ICMP) utility. If the address has not been changed, the factory-specified default is 192.168.254.253.

Host-to-MKP Instructions

The switcher accepts SIS (Simple Instruction Set) commands through the Host RS-232 port and Ethernet port. SIS commands consist of one or more characters per command field. They do not require any special characters to begin or end the command character sequence. Each switcher response to an SIS command ends with a carriage return and a line feed (CR/LF = ), which signals the end of the response character string. A string is one or more characters.

MKP-Initiated (Unsolicited) Messages

When a local event such as a front panel operation occurs, the switcher responds by sending a message to the host. The switcher-initiated messages are listed below (underlined).

(C) Copyright 2004, Extron Electronics MKP 2000, Vx.xx

The switcher initiates the copyright message when it is first powered on or when connection via Internet protocol (IP) is established. Vx.xx is the firmware version number.

Password:

The switcher initiates the password message immediately after the copyright message when the controlling system is connected using TCP/IP or Telnet and the switcher is password protected.

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