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PAS 9819/AO, 4 Channel, 16-Bit Isolated Current Output Card

Links to printable product info:

• Product Manual

The PAS 9819/AO provides four isolated, programmable high current output channels with sixteen bit resolution on a 6U VME card. Each channel consists of a high speed Digital-to-Analog Converter (DAC), followed by a high power operational amplifier. The output amplifier is configured to provide an output current that is proportional to the output voltage from the DAC. The output current range is +/- 40 mAmps.

Each channel is electrically isolated from system ground and from each other. Separate +/-30 volt isolated power supplies are provided for each channel. Digital data and control signals for each DAC channel are transmitted through digital isolators in order to keep the two sides electrically separated.

The output channel connections are terminated on a DB37 connector mounted through the front panel.

The card can be used in VME systems with A16, A24, or A32 addressing, and data writes of 16 and 32 bits are supported. DIP switches are used to configure the width of the address bus, and the instruction type specifies the data bus width. A board identifier PROM, control and status register, and a 32-bit test register fill out the register set.

Card Features: PAS 9819/AO

• 4 independent DAC channels with 16 bit programmable current outputs

• +/- 40 mAmp current output

• Binary Two’s Complement data format

• DAC’s reset to zero during power up or software reset

• Output slew rate of 1 mAmp per uSec

• Settling time of 100 uSec to 0.1% FSR

• Output signals terminate on a DB37 connector at the front panel

• VME 6U form factor; 233 mm x 160 mm card size

• VME access: D32, D16, A32, A24, A16 Slave

• No VME Interrupts

• VME SYSFAIL asserts on power up, jumper selectable

• Board Identifier PROM (Board ID is VMEIDPAS9819AOA0)

• Pass, Fail and Access LEDs on the front panel

• Simultaneous DAC update feature is program selectable.

• Loop back test registers allow verification of the VME bus interface.

• 32-bit VME interface allows two channels to be written with one transfer and provides twice the data transfer rate of 16 bit interfaces. 16 bit VME transfers are also supported.

• Each current output channel is powered by a separate, isolated, +/-30 volt DC-to-DC converter.

• Data and control signals are transmitted through digital isolators.

• Operating temperature range 0 to 60 degrees Celsius

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