Kantronics KPC-2 - Other Common Computers

CONNECT COMPUTER
7
DB-25 Pins 7 and 1
SG
DB-9 Pin 5
Signal Ground. This line establishes the common reference potential for all circuits except Protectiv
Ground.
DB-25 Pin 4
RTS
DB-9 Pin 7
Request To Send. This line tells the TNC that the terminal is ready to receive data. An ON level
tells the TNC it ma send data while an OFF level tells it to stop sending data. If the terminal for
any reason is unable to accept data from the TNC, it will cause this line to change to an OFF state,
providing that the terminal supports hardware flow control. For instance, buffer is full, terminal is
turned off and so on.
DB-25 Pin 5
CTS
DB-9 Pin 8
Clear To Send. This line is used by the TNC to tell the terminal whether or not it may send data to
the TNC. AN ON level tells the terminal it may send data while an OFF level tells it to stop sending
data. This pin is the complement to the RTS pin, implementing hardware flow control in the other
direction.
DB-25 Pin 8
DCD
DB-9 Pin 1
Data Carrier Detect. This line is an output from the TNC indicating connected status of the TNC.
When a connection exits on the current stream, this line will be true. (When using TTL levels, DCD
at +5 V indicates connected status.) This pin has no function on the KPC-1.
DB-25 Pin 6
DSR
DB-9 Pin 6
Data Set Ready. Some terminal programs look at this pin to see that the TNC is operating before
allowing you to talk to the TNC. This pin is pulled true and is common with DTR, as shipped from
the factory. In the KPC-1 DSR is jumpered to DTR and is not connected to any internal circuitry.
DB-25 Pin 20
DTR
DB-9 Pin 4
Data Terminal Ready. This pin is common with DSR in the TNC. The TNC assumes the terminal is
operating and does not require the terminal to pull this pin true. This pin may be isolated from
DSR if desired. In the KPC-1 DTR is jumpered to DSR and is not connected to any internal circuitry.
DB-25 Pins 11/18
Mark/Space
KAM ONLY
Mark/Space. These signals are available for connecting an external scope if desired. Refer to the
Scope Monitoring section for instructions.
DB-25 Pin 18
Test
KPC-2 ONLY
Processor Test Input. This is used by factory personnel only in repair and service operations. UN-
DER NOR CIRCUMSTANCES should you connect this pin to your terminal or computer output port.
DB-25 Pin 25
Plus 12 Volts
KAM, KPC-2 and KPC-2400
+12 V. This is an alternate input pin for supplying power to the TNC if desired. If the normal
+12 VDC input jack is used, this pin will be HOT. BE CERTAIN THIS PIN IS NOT CONNECTED TO
YOUR COMPUTER!
Other Common Computers