Network Technologies KEEMUX-Px RS232 Connections and Configuration, RS232 CONTROL, Baud Rate

NTI KEEMUX Series PS/2 KVM Switch

RS232 CONTROL
(Optional)	Rear View of KEEMUX-P4-RS
RS232 Connections and Configuration		O		O	O	O		O	RS232
									OFF
		V		V	V	V		M
		I		I	I	I		O
		D		D	D	D		N
								I
		E		E	E	E
								T
		4		3	2	1		R	1 2 3 4 5 6 7 8
									ON
2A	NTI	R	U	U	U		U	Mouse
			C	C	C		C	Keyboard
5VDC			P	P	P		P
								Daisy	Daisy
- +	1275 Danner Dr		4	3	2		1	Out	In
	Aurora, OH 44202
	www.nti1.com
	Tel:330-562-7070
	Fax:330-562-1999	CPU 4		CPU 3	CPU 2	CPU 1	PS/2 DEVICES

Remote Connection

The RS232 Interface (optional) is designed to meet the RS232C standard and can be controlled from any CPU or other controller with an RS232 communications port. The pin-out for the DB-9 connector(s) on the unit is as follows:

RS232 CONNECTOR (DB-9 FEMALE)

PIN	SIGNAL	FUNCTION
1	CD	Carrier Detect
2	TXD	Transmit data (RXD at host)
3	RXD	Receive data (TXD at host)
4	DTR	Data terminal ready
5	GND	Signal ground
6	DSR	Data set ready
7	RTS	Request to send
8	CTS	Clear to send
9	-	No connection

Note: Security must be disabled or user access granted on the port(s) to be selected by RS-232 control.

On the DB-9 female connector, pins 1 (DCD), 4 (DTR), and 6 (DSR) are shorted and pins 7 (RTS) and 8 (CTS) are shorted. Therefore, host handshaking is bypassed and TXD and RXD are the only active signals. A straight through DB-9 cable (not null modem) will work for most CPUs. To daisy chain multiple units, a Matrix Y-1 cable is used (see page 18) for each KEEMUX in the chain. The last unit in the chain should have DIP switch 1 ON (see table under "Unit Address and Loop Back" on page 18).

Baud Rate

The baud rate can be changed by powering down the unit, changing the 8 position RS232 dip switch on the rear of the KEEMUX, and then powering back up. This table shows how to set the baud rate.

	DIP SWITCH			BAUD RATE
4		3	2
OFF		OFF	OFF	300
OFF		OFF	ON	600
OFF		ON	OFF	1200
OFF		ON	ON	2400
ON		OFF	ON	9600
ON		ON	OFF
ON		ON	ON

OFF

1 2 3 4 5 6 7 8 ON

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