ICS AOB8/12, Product Manual

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Manual Number: 00650-134-4 Page 5
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 the Programming
section of this manual.
Output Ranges
There are three-position switches associated with each DAC channel to make voltage range selec-
tion: switches S17 (Channel 0) through S2 (Channel 15). A silk-screen illustration on the card de-
fines switch positions to use for each range. The following table presents the same information:
Voltage Range S1 S2 S3
0 to +2.5V OFF OFF ON
0 to +5V OFF OFF OFF
0 to +10V OFF ON OFF
-2.5V to +2.5V ON OFF ON
-5V to +5V ON OFF OFF
-10V to +10V ON ON OFF
Analog Outputs Update
Analog outputs are updated under program control in either one of two 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/A’s may be updated simultaneously. This is done
by first enabling simultaneous updating for all outputs and then preloading the low and high bytes
of each DAC and then initiating a simultaneous update by software command.
Refer to the Programming section of this manual for more detail.