Network Technologies ST-2U - Manual (Page 15)

NTI NODEMUX SERIES UNIVERSAL KVM SWITCH
12
NTI
SWITCH
CPU
RS232
First Unit
NTI
SWITCH
RS232
NTI
SWITCH
RS232
Second Unit Last Unit
RS232
Serial Port Matrix-Y-1 Matrix-Y-1 Matrix-Y-1
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
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
To allow multiple units to be controlled from a
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.
(See Fig. 15). See Fig. 16 for the pinout of the
Matrix-Y-1 cable.
Figure 15- Addressing a daisy-chain of NTI switches
Figure 16- Pinout for the Matrix-Y-1 cable
(Unit #1) (Source)
2 3
3 3
5 5 5
2 2
7
8
1
4
6
Jumper
Jumpers
Not connected to
source connector
(Unit #2)
9D Female 9D Male 9D Male
Wiring Schematic of Matrix-Y-1 cable
R e a r V i e w o f S T - 2 U - R S
U S E R
M O N I T O R
C P U 1 C P U 2
P W R
1 2
4 3
6 5
1 2
4 3
6 5
1 2
4 3
6 5
V I D E O 2 V I D E O 1
R S 2 3 2
O N
O F F
1 2 3 4 5 6 7 8