Network Technologies KEEMUX-P2 - Manual (Page 11)

9
RS232 Port (DB-9 MALE)
PIN SIGNAL FUNCTION
1 - No connection
2 RXD Receive data
3 TXD Transmit data
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
REMOTE (RMT-2-ST)
5 DIN SIGNAL DESCRIPTION
1 LED1 TTL output, low = port 1 selected
2 LED2 TTL output, low = port 2 selected
3 SWT TTL of contact closure input (10K pullup)
4 GND Ground
5 PWR +5V for LEDs, limited to 20mA
Low= < .4 volts High=> 2.4 volts
Control: When pin 3 (SWT) is brought low for a minimum of 10 MS, and then returned high, the switch will select the other port
(toggle).
TROUBLESHOOTING
1. Verify all cables are securely connected and that installation procedure was carefully followed.
2. Verify that the power-up sequence was observed.
3. If a CPU seems to be locked up, press the "CPU SELECT" button a couple of times.
4. If the problem still persists, unplug the keyboard and mouse cables (not the CPU keyboard and mouse) from KEEMUX-P2
and reconnect them.
5. If the KEEMUX-P2 switch continues to have erratic or inconsistent operation, there may not be enough power coming from
the CPUs to operate it (common with some older CPUs). If this is the case, contact NTI and order an optional power supply
(PS0018).
If the suggestions above have been tried and the KEEMUX-P2 KVM switch is still not functioning properly, a solution to the
problem may be found on our website at http://www.networktechinc.com in the Frequently Ask Questions (FAQ) section, or,
please call us directly at (800) 742-8324 (800-RGB-TECH) or (330) 562-7070 and we'll be happy to assist in any way we can.
5
3
2
4
1
Mating face of a
5 DIN female
1
Mating Face
of DB-9 Male
2 3 4 5
6 7 8 9