Advanced Instruments 3D3 - Barcode Port Connections; Supervisor;Operator Keyswitch Interface; Head Sensor Board (3 D3380) Description; Barcode Port: a D-Type, 15-Pin Barcode Port

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The Advanced
®
3D3/4D3 Service Manual
Note that your instrument is only designed to
support unidirectional communication with an
external device. At this time, there is no pro-
tocol for bidirectional communication.
For a sample RS-232 Port Setup, please see
the RS-232 Supplemental Information in the
Appendix at the end of this user’s guide.
Note: This instrument requires the use of a
null modem RS-232C cable. There are
several variations on null modem
cables. Advanced Instruments recom-
mends that you purchase a RS-232C
cable direct from our factory.
Supervisor/Operator Keyswitch Interface:
A PLD is used to interface the supervisor/
operator keyswitch to the microprocessor. In
Operator position, the user cannot change
setup or calibration settings.
Head Transition Board (M20450) Descrip-
tion: The stir/freeze coil and the sample
probe are connected to the head transition
board which allows easy sample probe
replacement.*
Head Sensor Board (3D3380) Description:
This board provides two optical sensors that
interface to a PLD on the main board. These
two sensors detect the head-up and head-
down conditions.**
Keypad Transition Board (FLO520)
Description: This board provides the inter-
face to the keypad along with pull-up resistors
for the keypad LEDs.**
Barcode Port: A D-type, 15-pin barcode port
is provided in the back of the 4D3 for con-
necting and providing power to such a device.
For proper operation, the barcode port
requires a 1200 bps, RS-232 signal providing
asynchronous serial data containing 1 start
bit, 8 data bits, 1 stop bit, and no parity.
A suitable barcode scanner is available from
Advanced Instruments. To interface with the
4D3, the barcode scanner must be pro-
grammed as follows, referring to the scanner
users guide.
1200 bps
CR suffix
disable beep after good decode
triggerless trigger mode (optional)
* 4D3 cryoscopes that have a suffix before
"E" and 3D3 osmometers that have a suf-
fix before "C" do not have the head tran-
sition board.
** 4D3 cryoscopes without a suffix do not
have the head sensor board or the keypad
transition board.
+5V DC 1 to reader
receive data 10 from reader
gnd/earth 9 common
Signal Pin Direction
Barcode Port Connections