Network Technologies ST-2U RS232 Control, RS232 Connections and Configuration, Remote Connection

NTI NODEMUX SERIES UNIVERSAL KVM SWITCH

PLEASE NOTE: It is necessary to configure a Sun CPU such that the Sleep Mode is not enabled. If a Sun CPU goes into sleep mode either automatically or manually, the user must reboot the Sun CPU in order to resume use of the Sun CPU.

To disable the Sleep Mode, perform the following steps:

1.Select "Power Manager"

2.Look for "Device Idle Time Before Power Saving Starts"

3.Select "Always ON"

4.Look for "Override Device Idle Time For:"

5.Make sure neither "Monitors" nor "Disks" are selected

RS232 CONTROL

(Optional)

RS232 Connections and Configuration

Remote Connection

RearViewofST-2U-RS

RS232

OFF 12345678 ON

VIDEO2 VIDEO1 MONITOR

CPU2 CPU1 USER

6	5	6	5	6	5
4	3	4	3	4	3
2	1	2	1	2	1

PWR

The RS232 Interface is designed to meet the RS232C standard and can be controlled from any host CPU or other controller with an RS232 communications port. A straight through DB-9 cable (not null modem) will work for most CPUs.

Baud Rate

The baud rate of the host CPU can be changed by using the menus in the RMTEST program (see "RS232 Interface Test Program" below). The desired baud rate of 9600, 2400, 1200, or 300 may be set. A data protocol of 8 data bits, no parity, and 1 stop bit is used for communications. The baud rate of the KEEMUX is configured using dipswitches (see Fig. 17).

Unit Address	RS232	Matrix-Y-1	Matrix-Y-1	Matrix-Y-1
To allow multiple units to be controlled from a
	CPU Serial Port
single host port, the RS232 control interface is
designed to allow "daisy chaining" up to 15
units. In order to connect multiple NODEMUX
units together a Matrix-Y-1 cable must be used.	RS232		RS232	RS232
(See Fig. 15). See Fig. 16 for the pinout of the
Matrix-Y-1 cable.
	NTI		NTI	NTI
	SWITCH		SWITCH	SWITCH
	First Unit	Second Unit		Last Unit

Figure 15- Addressing a daisy-chain of NTI switches

Wiring Schematic of Matrix-Y-1 cable

9D Male	9D Female	9D Male
(Unit #1)	(Source)	(Unit #2)
2		3
3	3		Not connected to
5	5	5	source connector

22

7

8 Jumper

1

4Jumpers

Figure 16- Pinout for the Matrix-Y-1 cable

12