Network Technologies KEEMUX-Px Unit Address and Loop Back, Wiring Schematic of Matrix-Y-1 cable

NTI KEEMUX Series PS/2 KVM Switch

Unit Address and Loop Back

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. 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

Note: In order to connect multiple KEEMUX units together a Matrix-Y-1 cable must be used. (See Fig. 14.) See Fig. 15 for the pinout of the Matrix-Y-1 cable. The Matrix-Y-1 cable is available from Network Technologies Inc.

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 14- RS232 connection with Matrix-Y-1 cable

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

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7

8 Jumper

1

4Jumpers

Figure 15- Pinout of Matrix-Y-1 cable

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