2.6.1 Other Computers with RS-232-C Ports
If your computer has an RS-232 port, consult your computer manuals to
see which pins are used for Transmit-Data, Received-Data and Signal-
Ground. Read the manufacturer's recommendations for connecting the
serial port to a modem and connect your PK-232 in the same way.
Your PK-232 is configured as Data Communications Equipment (DCE) which
receives data on pin-2. Most computers and terminals are configured
as Data Terminal Equipment (DTE) transmitting data on pin-2.
o If your computer is configured as DTE:
Use the supplied RS-232 cable with a Gender changing adapter if
necessary. These are available from Radio Shack (Part # 26-243)
and other computer stores.
o If your computer is configured as DCE:
Wire pin 2 of the PK-232 to pin 3 of the computer connector.
Wire pin 2 of the computer connector to pin 3 of the PK-232.
Wire pin 7 to pin 7.
o As a default the PK-232 provides XON/XOFF software flow-control
to the computer or terminal. The command XFLOW can be turned OFF
to disable software flow control and enable hardware handshake
if your computer requires it. Hardware flow control is achieved
with RTS/CTS (pins 4 and 5) of the DB-25 RS-232 I/O connector.
2.6.2 Other Computers with Non-Standard Serial Ports
Computers with non-standard serial ports must meet the following
conditions:
o The signal levels must be compatible with RS-232-C. The PK-232
requires the voltage levels from the computer be greater than
+3 volts in the "asserted" state and 0 volts or less in the "non-
asserted" state.
o The signal polarity must conform to the RS-232-C standard. The
0 or negative-voltage state must correspond to logical "1" and
the positive-voltage state to logical "0."
o The computer must be able to correctly receive a signal that
meets asynchronous RS-232-C specifications. The PK-232 supplies
signals that meet this specification.
Make or buy a cable that provides the following connections:
o The computer's serial port signal ground or common pin must be
connected to the PK-232's serial port connector pin 7.
o The pin on which the computer SENDS data must be connected to
the PK-232's connector pin 2.
o The pin on which the computer RECEIVES data must be connected to
the PK-232's connector pin 3.
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