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C-84
C
The D3000 and D4000 computer-to-analog output
interfaces are designed to be mounted remotely
from a host computer and communicate with
standard RS-232 and RS-485 serial ports. Simple
ASCII commands are used to control a 12-bit
digital-to-analog converter that is scaled to provide
commonly used current and voltage ranges.
An on-board microprocessor provides the
communications interface and many intelligent
analog output functions. These modules offer an
extremely flexible, easy-to-use, and cost-effective
approach to data acquisition.
⻬ Analog Output Ranges: 0-1 V, ±1 V, 0-5 V,
±5 V, 0-10 V, ±10V, 0-20 mA, 4-20 mA
⻬ Programmable High/Low Output Limits
⻬ 500 V rms Output Isolation
⻬ Scaling in Engineering Units
⻬ 12-Bit Resolution
⻬ Baud Rates: 300 to 38,400
⻬ Output Protection: 240 Vac (Current
Output), ± 30 V (Voltage Outputs)
OMEGABUS®Computer-to-Analog
Output Modules
D3000 and D4000
The D3000 and D4000 are compatible with the
OMEGABUS®D1000 and D2000 and may be used
in any combination. Up to 124 modules may be strung
on one set of wires. All modules are supplied with
screw terminal plug connectors and captive mounting
hardware. The connectors allow system expansion,
reconfiguration, or repair without disturbing field wiring.
Their small size allows them to be mounted in virtually
any location or position including explosion-proof
housings and DIN rails. Utility software (D1000-SW)
is available upon request at no charge on an
IBM-compatible disk.
The D4000 modules offer several additional
features. A slew rate may be programmed,
which causes the output to ramp at an
adjustable rate in either an increasing or
decreasing direction. The ramp can be
initiated and maintained by commands from
the computer or with external switch closures
to the module. The D4000 module provides a
readback feature which allows the computer
to verify the integrity of the output.
The D4000 modules also include a watchdog
timer circuit that can be set such that if the
computer fails to communicate with the module
after a preset time period, the module will reset
itself to an adjustable default value. This feature
minimizes the risks of communication failure.
The A1000 RS-232 to RS-485 converter and repeater
can be used if an RS-485 port is not available in your
PC, and it is necessary to communicate long distances
away. The A1000 also provides power for the modules.
RS-232 modules can be used for distances less than
50 feet.
$
275
Basic Unit
SERIAL I/O
1.1"
(2.794 cm)
.85"
(2.159 cm)
2.45"
(6.223 cm)
A/OUT
(9.144 cm)
(5.842 cm)
1 2 3 4 5 6 7 8 9 10
(5.029 cm)
3.60"
2.3"
1.98"
1.612"
(4.094 cm)
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C-85
Common Specifications, D3000 and D4000
ANALOG OUTPUT
• Single channel analog output
Voltage: 0-1 V, ± 1 V, 0-5 V, ± 5 V, 0-10 V, ± 10 V
Current: 0-20 mA
• Input isolation to 500 V rms
• 12-bit measurement resolution
• Accuracy (integral and differential non-linearity):
0.1% FSR (max)
• Zero drift: ±30 µV/°C (voltage output)
±1.0µA/°C (current output)
• 1000 conversions per second
• Settling time to 0.1% FS 300 µs typical (1 ms max)
• Programmable output slew rate: 0.01 V/s (mA/s)
to 10,000 V/s (mA/s) (D4000 only)
• Autozero and autocalibration-no adjustment pots
• Voltage compliance: ±12 V
• Output current, short circuit current: 5 mA min, 10 mA max
D3000 Series Output Module
Current Output
Model No. Output Range Input Price
D3251 0 to 20 mA RS-232C $275
D3252 0 to 20 mA RS-485 275
D4000 Series Output Module
Voltage Output
Model No. Output Range Input Price
D4121 ± 1 V RS-232C $350
D4122 ± 1 V RS-485 350
D4131 ± 5 V RS-232C 350
D4132 ± 5 V RS-485 350
D4141 ± 10 V RS-232C 350
D4142 ± 10 V RS-485 350
D4161 0 to 1 V RS-232C 350
D4162 0 to 1 V RS-485 350
D4171 0 to 5 V RS-232C 350
D4172 0 to 5 V RS-485 350
D4181 0 to 10 V RS-232C 350
D4182 0 to 10 V RS-485 350
D4000 Series Output Module
Current Output
Model No. Output Range Input Price
D4251 0 to 20 mA RS-232C $350
D4252 0 to 20 mA RS-485 350
To Order
(Specify Model Number)
D3000 Series Output Module
Voltage Output
Model No. Output Range Input Price
D3121 ± 1 V RS-232C $275
D3122 ± 1 V RS-485 275
D3131 ± 5 V RS-232C 275
D3132 ± 5 V RS-485 275
D3141 ± 10 V RS-232C 275
D3142 ± 10 V RS-485 275
D3161 0 to 1 V RS-232C 275
D3162 0 to 1 V RS-485 275
D3171 0 to 5 V RS-232C 275
D3172 0 to 5 V RS-485 275
D3181 0 to 10 V RS-232C 275
D3182 0 to 10 V RS-485 275
The D3000 and
D4000 modules
may be stacked
for multiple outputs
ANALOG OUTPUT READBACK (D4000)
• 8-bit analog-to-digital converter
DIGITAL INPUTS
• Voltage levels: ±30 V without damage
• Three digital inputs (all models)
• Switching levels: High, 3.5 V min, low, 1.0 V max
• Internal pull-up resistors for direct switch input
COMMUNICATIONS
• RS-232, RS-485
• Up to 124 modules with A1000 converter/repeater,
32 without A1000
• User selectable channel address (via software command)
• Selectable baud rates: 300, 600, 1200, 2400, 4800,
9600, 19.2K, 38.4K
• ASCII format command/response protocol
• Parity: odd, even, none
• All communications setups (address, baud rate,parity)
stored in nonvolatile memory using EEPROM
• Checksum can be added to any command or
response
• Communications distance up to 10,000 feet with
RS-485 modules
Power Requirements: Unregulated 10 V to 30 Vdc,
0.75 W max (voltage output), 1.0 W max (current output)
Case: ABS with captive mounting hardware
Connectors: screw terminal barrier plug (supplied)
Temperature Range: Operating: -25°C to 70°C
Storage: -25°C to 85°C
Relative Humidity: 0 to 95% non-condensing
MOST POPULAR MODELS HIGHLIGHTED
Software and Accessories
Model No. Price Description
A1000 $250 RS-232 to RS-485 converter
A1000-CABLE 15 RS-232 9-pin cable
Each unit is supplied with a CD ROM that includes a complete
operator’s manual and Windows setup software.
D1000 Series digital transmitters are also available with Modbus
RTU protocol. To order transmitters Modbus RTU protocol, add
suffix “M” at the end of the model number, no additional charge.
IBM PC
IBM PS/2
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