TAS6xx - Part Number 70-2420-(x) (Also applies to 9900BX
These TAS units utilize a null modem cable, connected to the 9-Pin D-sub connector COM1 on the processor. The pinout below can be referenced to the TAS6xx Processor side.
COM1 pin 2 is RS232 Port 1-Rx
COM1 pin 3 is RS232 Port 1-Tx
Com1 pin 5 is RS232 Port 1-GND
The following instructions describe how to configure HyperTerminal for use with the TAS.
HyperTerminal is a terminal emulator available with Microsoft Windows.
Any terminal emulator
(Kermit, Z-Term, etc.) may be used as long as it supports ANSI escape sequences; the emulator
should be configured to communicate at 9600 bits
per second with no parity, one start bit, and no
flow control. Steps A through L will establish the required parameters. If the computer is already
set up, proceed to step M.
A. With the TAS and the Portable Computer (PC) turned off, connect a null-modem cable
(sometimes called data transfer cable) to the plug marked COM1 on the TAS Processor
and to the 9-pin serial connector on the PC.
Turn on the PC. Locate the HyperTerminal application (on Windows 98,
HyperTerminal is available in the HyperTerminal folder under the Start->Programs-
C. Start the HyperTerminal application by double-clicking on HyperTrm.exe.
D. When the "new connection" dialog box appears asking for a connection name, type
"TAS" and click on "OK".
E. When the "connect to" dialog box appears, select the "Connect using" field to "Direct to
Com1" and click "OK".
F. When the "COM1 Properties" dialog box appears, set "Bits per second" to 9600. Verify
that "Data bits" is set to 8, "Parity" is set to "None", "Stop bits" is set to "1" and "Flow
Control" is set to "None"; click "OK".
G. In the "TAS - HyperTerminal" window, select the File->Properties menu item.
H. When the "TAS Properties" dialog box appears, click the "Settings" tab at the top.
I. On the "Settings" section verify the emulation is ANSI, then click the "ASCII Setup..."
at the bottom.
J. On the "ASCII Setup" dialog box, verify that "Echo typed characters locally" is
checked and "Character delay" is zero. Neither "send line ends with line feeds" nor
"append line feeds to incoming line ends" should be checked. Ignore the other
selections. Click "OK".
K. Click "OK" on the "TAS Properties" dialog box.
L. In the "TAS - HyperTerminal" window, select the File->Save menu item.
M. Verify one end of the "null modem" serial cable is plugged into the COM1 serial port of
N. Verify the other end of the "null modem" serial cable is plugged into the TAS processor
connector marked COM 1.
O. Turn the TAS on.
P. If the HyperTerminal window is not already displayed on your computer, start it by
double-clicking on the "TAS" icon in the HyperTerminal folder (go to the Start menu-
>Programs->Accessories menu and open the HyperTerminal folder).
Q. Inside the "TAS - HyperTerminal" window, you should see the message "Enter link
msg to connect:" as shown below (this may take up to 20 seconds to appear after
starting HyperTerminal and the TAS). Recycle power on the TAS if necessary.
R. If the message does not appear, check the serial connections (steps M-N) and confirm
the TAS is turned on, then return to step Q.
TAS6xx-A Part Number 700-00185- (x)
The COM1 connector no longer exists on the TAS6xx-A models. The TAS-A processor, 700-00185-(), does not provide an RS-232 port on a 9-pin D connector, so
the installing agency should consider how a computer will be connected to one of the TAS-A serial
ports. Some possible strategies follow:
In a new installation that does not utilize P1:
Plan to leave RS-232 port #1 unused in the aircraft installation (in other words, don’t use
RS-232 port #1 in P2). An adapter cable can be built to connect a computer into RS-232
port #1 on P1 for checkout and configuration.
In a retrofit installation that does not utilize P2:
Since the TAS-A provides two additional RS-232 ports on P2 (port #5 and port #6), ether
one of these ports can be used for a computer connection. An adapter cable can be built to
connect a computer into one of the new/unused RS-232 ports on P2 for checkout and
Wire a 9-pin male D connector into the aircraft harness to provide access to a spare RS-232
port. The pinouts for the 9-pin connector would match the pinouts for COM1 as identified
in section 1.18.3 on page 34. The 9-pin connector and short attached cable would be tied
off and labeled “COM1” so that it can be used for easy connection to a computer for
checkout and configuration.
Hyper-terminal instructions are the same as above. It should be noted that the TAS-A suppression circuit functions differently than the TAS6xx Non-A versions. Reference Avidyne Service Bulletin 601-00185-006 which can be found at dealers.avidyne.com