ACCES I/O Products supports critical infrastructure as defined by the US Department of Homeland Security and will be open during normal business hours 6 AM to 6 PM to serve our customers.
We are here to support you.


ISA Bus Six Channel Analog Output Card


  • Six independent analog outputs
  • 12-Bit resolution
  • Voltage Output Ranges: 0-5V, 0-10V, ±2.5V, ±5V, ±10V
  • Current Output Ranges: 0-20mA, 4-20mA, (0-50mA and 10-50mA optional).
  • Individual range selection per channel
  • Three update modes including simultaneous update
  • Additional 24-bit parallel digital input/output port
  • Setup and calibration software included
  • Designed, made, supported, and manufactured in the USA
Model DA-06A can be installed in I/O slots of PC/ XT/AT class computers. It economically provides six independent 12-bit Digital-to-Analog Converters (DAC) and 24 digital input/output channels. Each DAC has double-buffered input for single step update and occupies a unique address location. Analog Output Update Mode is selected by a selector switch on this card. Three update modes are available:
  • Individual update of each channel.
  • Simultaneous update of all selected channels.
  • Simultaneous update of all selected channels upon receipt of an external signal.
(Note: This mode requires use of six digital I/O lines on Port C.)

Digital I/O channels are provided from a type 8255 Programmable Peripheral Interface (PPI). The PPI has 24 I/O bits which may be programmed in three modes of operation:

  • Mode 0: Each group of 8 I/O bits may be setup to be input or output.
  • Mode 1: Each group may be setup to have eight lines of input or output. (Note: in this mode, three lines are used for handshaking and interrupt-control signals.)
  • Mode 2: Eight lines are used for bidirectional bus and five lines are used for handshaking.
Base address selection is via on-card DIP switches and the DA-06A requires 16 consecutive I/O address locations. The base address can be selected anywhere within the I/O address range of 000-3FF (hex) providing that the address locations do not overlap other functions. Data are written to the DAC's in right-justified 2-byte binary format (8 LSB's and 4 MSB's). For example:

Unipolar Ranges:

0000 0000 0000 = Zero
1000 0000 0000 = ½ Scale
1111 1111 1111 = Full Scale

Bipolar Ranges:

0000 0000 0000 = Neg. Full Scale
1000 0000 0000 = Zero
1111 1111 1111 = Pos.FullScale

Available Reference Manuals

Available Software Downloads

Drivers and Downloads

Full list of available Downloads: Software Packages, Drivers, Manuals, and other documents

Custom Software

ACCES also offers Custom Software Services for our products. Our prices are unbelievably low, often as inexpensive as free! If you need something tweaked to support your needs, or an entire enterprise application developed from scratch, it is definitely worth your time to inquire with us, first.

Further information about available ACCES Software:

Redistributing Windows Drivers
A list of ACCES drivers and the files that compose them under different versions of Windows, so you can easily redistribute ACCES cards and drivers.


Analog Outputs

  • Resolution: 12 bits (0 to 4095 decimal)
  • Channels: Six
  • Voltage Output Ranges at 5mA max.:
    0.0 to 5.0 VDC, 0.0 to 10.0 VDC, ±2.5 VDC, ±5.0 VDC, ±10.0 VDC
  • Current Output Ranges with excitation voltage (8 - 36) VDC:
    1 to 5 mA, 4 to 20 mA, 0 to 50 mA *
    *: Addition of one 167 ohm resistor per channel is required.

Digital to Analog Converter

  • AD-7548 monolithic chip, double buffered, right justified.
  • Relative Accuracy: ± 1 LSB (includes nonlinearity)
  • Monotonicity: Guaranteed over operating temperature range
  • Settling time: 4 usec to 0.01% for full scale step input
  • Offset Temperature Drift:
    ± 1 ppm/°C typ., ± 3 ppm/°C max.
  • Gain Temperature Drift:
    ± 1 ppm/°C typ., ± 5 ppm/°C max.
  • Data Format: Right-justified, two bytes (8LSB's and 4MSB's)

Digital I/O

  • 24 programmable digital input/output lines. (Ports A, B, C lo, and C hi).
  • 8255 PPI Controller. All modes supported.
  • Inputs TTL, DTL, CMOS compatible:
    Logic Low: -0.5V to +0.8V., Logic High: +2.0V to +5.0V.
  • Load Current: 10 uA.
  • Outputs TTL, DTL, CMOS compatible:
    Logic Low: 0.45V max. at 1.7mA sink current.
    Logic High: 2.4V min. at -200uA source current., 1.5V min. at -1mA source current (Darlington drive not available from Port A).


  • Operating Temperature: 0 to +60 °C.
  • Storage Temperature: -20 to +85 °C.
  • Humidity: 5% to 95% non condensing.
  • Size: 13.375 inches. Install in a full-size slot.

Power Requirements

  • +5 VDC at 500mA max.
  • +12 VDC at 70mA max.
  • -12 VDC at 60mA max.

Regulatory Compliance

  • This product is in full compliance with CE requirements.

ModelPrice (USD)

Acquisition, Control, Communication: Engineering and Systems