User manual

Page 3-1
Manual MPCI-DA12-16.Dh
Chapter 3: Option Selection
Voltage output ranges are determined by switch settings as described in the following paragraphs.
Also, the method to update D/A outputs is programmable as described here and in Chapter 5,
Programming .
Output Ranges
There is a three-position slide switch associated with each DAC channel to make voltage range
selection: switches S1 (Channel 0) through S16 (Channel 15). A silk-screen diagram on the card
defines switch positions to use for each range. In addition to the switch, one jumper per channel is used
to select Voltage vs Current Output. The following table presents the same information:
Voltage Range S1 S2 S3 JP1-16
0 to +2.5V OFF OFF On
Set
in
Position
V
0 to +5V OFF OFF OFF
0 to +10V OFF ON ON
-2.5V to +2.5V ON OFF OFF
-5V to +5V ON OFF ON
-10V to +10V ON ON OFF
Current Range S1 S2 S3 JP1-16
4 mA to 20 mA OFF OFF OFF Position I
Analog Output Update
Analog outputs are updated under program control in any of three ways:
a. Automatic Update: Each channel is updated individually when new data are written to
the related high-byte base address. Individual update mode may be
set by a special read operation as defined in the programming
section of this manual.
OR
b. Simultaneous Update: The outputs of all D/As may be updated simultaneously. This is
done by first enabling simultaneous updating for all outputs,
preloading the low and high bytes of each DAC, and then initiating
a simultaneous update by software command.
OR