ADDENDUM A:
Obsolescence of the 77206-01 8-bit Channel
Card, the 77206-12 10-bit Channel Card and
the A10946-00 12-bit Channel Card.
In 2004, the 77206-01 DynaFlow 8-bit Channel Card was
replaced by the 77206-12 10-bit Channel Card to improve
the resolution of the analog outputs on this card. Then
in 2006, the 77206-12 10-bit Channel Card was replaced
by a totally redesigned 12-bit Channel Card and it was
assigned a part number of A10946-00. Lastly, in 2007, the
A10946-00 board was obsoleted and replaced by 2 boards,
the A10946-01 and the A10946-02. The reasons for this
final change are explained below: (This information is also
contained in Service Note AF-111307.)
The IC chip used on the A10946-00 DynaFlow Channel
Card that produces the 4-20 mA output for flow rate and
pressure control is becoming extremely expensive and
is currently experiencing very long lead times. We have
decided to produce two versions of the DynaFlow Channel
Card. One version will be built as the boards are now. The
other version will not have the 4-20 mA converter IC on
the board, which will effectively eliminate the capability of
the board to output 4-20 mA signals for these two outputs.
(Our sales history shows very few users make use of these
two output signals.) The 0-10 VDC outputs for these two
signals will still function normally.
In order to ensure that the proper boards are selected, the
following changes have been made to the part numbers:
The A10946-00 part number has been obsoleted. The
A10946-01 board is the new board without the 4-20 mA
IC’s and is the board that will be used in all future builds
unless the customer specifically requests 4-20 mA outputs
for these two signals. The A10946-01 board can be modified
APPENDIX
by our manufacturing facility to become an A10946-02,
when necessary, if this option is required. (Because of the
high cost and limited availability of these IC’s, there will be
an additional cost for this option.)
If you currently use the obsoleted A10946-00 boards, our
technical support personnel will need to know if you are
using the 4-20 mA option for either the flow rate output or
the pressure control output to be able to determine which of
the two new boards to send. This can be done by examining
the jumpers on the boards you are now using. If jumpers
any of the following jumpers: JMP5, JMP6, JMP7, or JMP8
are connected between pins 1 to 2, this most likely indicates
that you are using the 4-20 mA option and will require the
A10946-02 board. (Unless that channel or output signal
is not being used and the jumpers were changed from the
factory defaults for some reason.) In all other cases, the
A10946-01 board should be used. (See picture on next
page. Note that pin #1 is toward the top of the board.)
Since this is a totally redesigned board from that of the
77206 series boards, we have also included jumper and
dip switch setting information with this addendum. The
dip switch settings for SW1 have not changed. Refer to
"Hardware Settings" in current DynaFlow User Manual for
these settings.
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