Belkin F8E832-BNDL Manual do Utilizador descarregar pdf (Página 31)

NTI UNIMUX SERIES USB KVM SWITCH

Unit Address and Loop Back

To allow multiple units to be controlled from a single CPU serial port, the RS232 control interface is designed to allow "daisy

chaining" up to 15 units. By setting the appropriate RS232 DIP switches, 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. Use the table below to set the unit

address.

DIP SWITCH UNIT ADDRESS

8 7 6 5

OFF OFF OFF OFF 0 (not valid)

OFF OFF OFF ON 1

OFF OFF ON OFF 2

OFF OFF ON ON 3

OFF ON OFF OFF 4

OFF ON OFF ON 5

OFF ON ON OFF 6

OFF ON ON ON 7

ON OFF OFF OFF 8

ON OFF OFF ON 9

ON OFF ON OFF 10

ON OFF ON ON 11

ON ON OFF OFF 12

ON ON OFF ON 13

ON ON ON OFF 14

ON ON ON ON 15

Figure 29- RS232 connection with Matrix-Y-1 cable

Figure 30- Pinout of Matrix-Y-1 cable

Command Protocol

RS232 commands supported by the unit are defined below. All command strings should be terminated with a <CR> (carriage

return). When a command is sent, the entire string is echoed back along with a response from the addressed unit as shown in the

command definitions. All characters in the command string should be upper case, and all numbers below 10 should have a

leading 0 (ex: 1 = 01). As command strings are sent, the inner character delay cannot exceed 500 milliseconds.

Figure 31- RS232 Communication Illustrated

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

(Unit #1)

(Source)

555

Jumper

Jumpers

Not connected to

source connector

(Unit #2)

9D Female9D Male 9D Male

Wiring Schematic of Matrix-Y-1 cable

Note: The "loop back" RS232 DIP switch (RS232 DIP

switch 1) should be ON for the last unit in the chain, and

OFF for all other units. If only one unit is being controlled,

the loop back DIP switch should be left ON.

Note: In order to connect multiple UNIMUX units together

a Matrix-Y-1 cable must be used. (See Fig. 29.) See Fig.

30 for the pinout of the Matrix-Y-1 cable.

CS 01,01,03<CR>

(COMMAND RECEIVED)

(RESPOND)

* <CR>

(COMMAND SENT)

(RESPONSE RECEIVED)

CS 01,01,03<CR>

* <CR>

CPU

SWITCH AT UNIT ADDRESS 01

RS232

(ECHO)

CS 01,01,03<CR>

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 40 41

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