These units each contain eight independent 12-bit digital-to-analog converters (DACs) and amplifiers for voltage outputs and voltage-to-current conversion. The DACs may be updated in a channel-by-channel mode or simultaneously. There are eight channels of voltage output and eight corresponding channels of 4-20mA current output. The output voltage ranges are software selectable. Calibration is performed by software. Factory calibration constants are stored in the EEPROM memory and can be updated by disconnecting the I/O wiring and entering software calibration mode. The units have analog voltage ranges of 0-5V, 0-10V, and ±5V, all at up to 10mA. Model RDAG12-8 is packaged in a NEMA4-compliant enclosure.

Model RDAG12-8H is similar except that each DAC output can drive loads up to 250mA. RDAG12-8H is packaged in a non-sealed "T-Box" steel enclosure.

Both models also have seven digital input/output ports. Each port can be individually programmed to be an input or an output. Digital input ports can accept logic high input voltages up to 50V and are overvoltage protected to 200VDC. Output drivers are open-collector and can comply with voltages up to 50VDC user-supplied voltage. Each output port can sink up to 350mA but total sink current is limited to a cumulative 650mA for the seven bits.

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 Ouputs

• Channels: Eight independent.
• Type: 12 bits, double-buffered.
• Non-linearity: ±0.9 LSB maximum.
• Output Ranges: 0-5V, 0-10V, ±5V.
• Current Output: 4-20mA (user supplied 5.5-28V).
• Output Drive: up to 10mA maximum.
• Drive Capability:
  • RDAG12-8H: 250mA outputs.
• Output Resistance: 0.5Ω.
• Monotonicity: ±½ bit.
• Settling Time: 15usec to ±½LSB for full-scale change of output.

Digital I/O

• Number of Bits: Seven parallel bits. Each is software configured to be input or output on a bit-by-bit basis.
• INPUT:Logic Low: -30.0 to +0.8 VDC at -0.4 mA max. Protected to -140VDC
• INPUT:Logic High: 2.0 to 50.0 VDC (20uA max at 5V in, 5mA max at 50V in)

• OUTPUT:Logic-Low Sink Current: 350 mA maximum. Inductive-kick suppression diode included in each circuit.
• OUTPUT:High-Level Output Voltage: Open collector, compliance with up to 50V user-supplied voltage. If no user-supplied voltage exists, outputs are pulled up to +5VDC via 10 kilohm resistors.

Environmental

• RDAG12-8
  • Operating Temperature Range: 0° to 65°C. (Optional -40°C to +80°C.)
  • Storage Temperature Range: -20°C to +70°C.

• RDAG12-8H
  • Operating Temperature Range:0° to 65°C. (Optional -40°C to +80°C.)
  • Storage Temperature Range: -20°C to +70°C.
• Humidity: 5% to 95% RH, non-condensing. Enclosure is designed to meet NEMA 4 requirements.

Power Required

• Power for the opto-isolated section can be applied from the computer's +12 VDC power supply via the serial communications cable, if a four-wire cable is used, or by a local isolated power supply. Power for the rest of the pod can be provided by a local power supply.
• Opto-Isolated Section: 7.5 to 28 VDC @ 40 mA maximum (7 mA at 12 VDC .)
• Local Power
  • RDAG12-8
    • 7.5 to 16 VDC at 400 mA (typical).
  • RDAG12-8H
    • 7.5 to 16VDC @ 2.3A
    • -7.5 to -16VDC @ 2.0A

Regulatory Compliance

• This product is in full compliance with CE requirements.