Omega D5000 Specification

OMEGABUS® Four Channel Sensor to Computer Interface Modules

D5000 Series

D5321 shown smaller
than actual size.

From

$

250

Basic Unit

U Four Channel Analog Input
U Complete Sensor to

RS-485 or RS-232C Interface

U ASCII Format Command/

Response Protocol

U 500 V RMS Analog

Input Isolation

U 15-Bit Measurement

Resolution

U Continuous Self-Calibration; No

Adjustments of any Kind

U Programmable Digital Filter
U Requires 10 V to 30 Vdc

Unregulated Supply

U Transient Suppression on

RS-485 Communications Lines

U Screw Terminal Plug

Connectors Supplied

KQSS-14U-12, Type K quick disconnect
thermocouple. Visit us online for more information.

The D5000 four channel sensor to
computer modules are a family of
complete solutions designed for
data acquisition systems based
on personal computers and other
processor-based equipment with
standard serial I/O ports.

The modules convert four analog
input signals to engineering units
and transmit in ASCII format to
any host with standard RS-485 or
RS-232C ports. These modules
can measure temperature, voltage
and current. The modules provide
direct connection to a wide variety
of sensors and perform all signal
conditioning, scaling, linearization
and conversion to engineering units.

The modules contain no pots or
switches to be set. Features such
as address, baud rate, parity, echo,
etc. are selectable using simple
commands over the communications
port–without requiring access to the
module.

The selections are stored in
nonvolatile EEPROM which
maintains data even after power
is removed. The key to the D5000
series is that the modules are easy
to use. You do not need engineering
experience in complicated data
acquisition hardware. With the D5000
series modules, anyone familiar with
a personal computer can construct a
data acquisition system.

1

D1321 shown smaller than actual size.

This modular approach to data
acquisition is very flexible, easy
to use and cost effective. The
modules can be mixed and matched
to fit your application. They can be
placed remote from the host and
from each other. You can string up
to 30 modules on one set of wires
by using RS-485 with repeaters.

The D5000 Series is completely
hardware and software compatible
with the D1000, D2000, D3000 and
D4000 series and may be mixed in
any combination.

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.

THEORY OF OPERATION

D5000 modules are complete four­channel data acquisition systems.
Each unit contains analog signal
conditioning circuits optimized for
a specific input type. The amplified
sensor signals are converted to
digital data with a microprocessor­controlled integrating A/D converter.
Offset and gain errors in the analog
circuitry are continuously monitored
and corrected using microprocessor
techniques. The D5000 converts
the digital signal data into
engineering units using look-up
tables. The resultant data is stored
in ASCII format in a memory buffer.
The modules continuously convert
data at the rate of 8 conversions
per second and store the latest
result in the buffer.

The host computer may request
data by sending simple ASCII
commands to the module. The
D5000 will instantly respond by
communicating the ASCII buffer
data back to the host.

USER OPTIONS

The D5000 offers a variety of user­selectable options including choice
of address, baud rate, parity, echo,
etc. All options are selectable
using simple commands over the
communications port. All options
are stored in a nonvolatile EEPROM
which maintains data even after
power is removed.

DIGITAL FILTER

The D5000 options include a unique
programmable single
pole digital filter. The filter is used
to smooth analog data in noisy
environments. Separate time
constants may be specified for
small and large signal changes.
Typically, a large time constant is
specified for small signal changes
to filter out noise and provide stable
output readings. A smaller time
constant may be chosen for large
signal changes to provide fast
response to such changes.

COMMUNICATIONS

The D5000 are designed to be easy
to interface to all popular computers
and terminals. All communications
to and from the module are
performed with printable ASCII
characters. This allows the
information to be processed with
string functions common to most
high-level anguages such as
BASIC. For computers that support
standard ports such as RS-232C,
no special machine language
software drivers are necessary for
operation.

RS-232C is not designed to be
used as a multiparty system;
however, the module can be daisy­chained to allow many modules
to be connected to a single
communications port.

In this network, any characters
transmitted by the host are received
by each module in the chain and
passed on to the next module until
the information is echoed back to
the host. If a module is correctly
addressed and receives a valid
command, it transmits a response
on the daisy chain network. The
response will be rippled through any
other modules in the chain until it
reaches the host.

RS-485 was developed for
multidropped systems that can
communicate at high data rates
over long distances. For systems
requiring many modules, high
speed or long distances, RS-485 is
recommended.

COMMAND SET

The D5000 Series uses a simple
command/response protocol for
communication. A module must be
interrogated by the host to obtain
data. A module can never initiate
a command sequence. A typical
command/ response sequence
could look like this:

Command: $1RD
Response: *+00075.00

A1000 RS-232 to RS-485 converter/repeater

2

0 to 100%

A command is initiated with a
command prompt, which may
be a dollar sign ($) or a pound
sign (#). Following the prompt, a
single address character must be
transmitted. Each module on a
communications bus must be set
up with a unique address. The
command is directed in this case
to module address ‘1’. The address
is followed by a two-character
command, which in this case is RD
for Read Data. The command is
terminated with a carriage return.
The table below shows the D5000
commands. For each case, a
sample command and response
is shown. Notice that some
commands only respond with an *
acknowledgment.

UTILITY SOFTWARE
The utility software CD contains
Windows setup software that makes
the D5000 series easier to learn
and use. A menu-driven setup
program is provided to simplify
configuration of all user-selectable
options such as address, baud rate

and parity. Context-sensitive help
is available during configuration for
each selectable parameter.

The utility software also contains
programming examples written
in high level languages such as
Visual Basic and C. The examples
are easily configured for COM1: or
COM:2: ports are provided in ASCII
text format. One copy of the utility
software CD is inclued with each
D5000 module.

D5000 Scaling

Each D5000 can output data in
easy-to-understand engineering
units that may be instantly read
and interpreted, without software
conversion, by a host computer.
Using simple ASCII commands, the
voltage or current input range of a
D5000 module can be rescaled to
represent desired engineering units
such as degrees or psi.

For example, an application requires
the displayed output values from
a D5251 4-20 mA current input
module to be rescaled to 0 to 100%.

D5000 Series Command Set

Typical Typical
Command Definition Command Response

RB Read Block of Data $1RB *+00070.00

*+00112.00
*+00555.00

RD Read Data $1RD *+00072.00
REA Read Extended Address $1REA *3031
RID Read IDentification $1RID *BOILER
RMN Read Displayed MiNimum $1RMN *+00025.00
RS Read Setup $1RS *31070142
RSU Read Setup $1RSU *31070142
RZ Read Zero $1RZ *+00000.00
WE Write Enable $1WE *

4-20 mA

Transmitter

Scaling to desired engineering units.

4-20 mA

D5251

4-20 mA/

RS-232

The D5251 module has an actual
input range of 0-25 mA to make it
easier to adjust for zero and span
and to allow for drift in the end points
of the input.

D5000 Mechanicals and
Dimensions
Case: ABS with captive hardware
Connector: Screw terminal barrier

plug (supplied)

NOTE: Spacing for mounting screws
= 2.700" (6.858 cm).
Screw threads are 6 X 32

SPECIFICATIONS

ANALOG
Channels: Four analog input
Maximum CMV:

Input to output at 60 Hz: 500 V rms
Leakage: Input to output
at 115 V rms, 60 Hz: <2µA rms

Resolution: 15-bit measurement
Conversion Speed:

8 conversions per second
Common Mode Rejection:
100 dB at 50/60 Hz
Calibration: Autozero, no
adjustment pots

Write Protected Commands

Typical Typical
Command Definition Command Response

CZ Clear Zero $1CZ *
ID IDentification $1IDBOILER *
RR Remote Reset $1RR *
SU Setup Module $1SU31070142 *
TS Trim Span $1TS+00600.00 *
TZ Trim Zero $1TZ+00000.00 *
WEA Write Extended Address $1WEA3031 *
WMN Write MiN Displayed Value $1WMN+00000.00 *
WMX Write MaX Displayed Value $1WMX+00025.00 *

For greater data security, options are available to echo transmitted commands and
to send and receive checksums.

Front view

Dimensions: mm (in.)

Side view

D5000 dimensional drawing

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DIGITAL
Microcomputer: 8-bit CMOS
Filtering: Small and large signal

digital filtering with user selectable
time constants

COMMUNICATIONS
Baud Rates:

300, 600, 1200, 2400, 4800, 9600,
19,200, 38,400, 57,600, 11,5200
Data Format: NRZ asynchronous;
1 start bit, 7 data bits,
1 parity bit and 1 stop bit

Parity: Odd, even, none
Address: User selectable address
Protocol: ASCII format
Multidrop Modules:

Up to 30 per host serial port
Communications: Distance
up to 1219 m (4000') (RS-485)
Transient Suppression:
On RS-485 communication lines
Communications Error:
Checking via checksum
Communications Setups:
Stored in EEPROM

POWER REQUIREMENTS
Unregulated: 10 V to 30 Vdc,

0.75W max. Protected against
power supply reversals.

ENVIRONMENTAL
Temperature Range:
Operating: -25 to 70°C
Storage: -25 to 85°C
Relative Humidity:

0 to 95% non-condensing

D5100 VOLTAGE INPUTS
Input Ranges: ±100 mV, ±1 V,

±5 V, ±10 V, ±100 Vdc

Resolution: 0.01% of FS (4 digits)
Accuracy: ±0.02% of FS max
Zero Drift: ±1 count maximum

(autozero)

Span Tempco: ±50ppm/°C maximum
Input Burnout Protection:

To 250 Vac
Input Impedance:

≤ +1 V input = 100 MΩ min
≥ +5 V input = 1 MΩ min

D5200 CURRENT INPUT
Current: 4-20 mAdc
Resolution: 0.04% of FS
Accuracy: 0.04% of FS
Zero Drift: ±1 count maximum

(autozero)

Span Tempco: ±50ppm/°C maximum
Voltage Drop: ±1.0V max
D5300 THERMOCOUPLE INPUTS
Thermocouple Types:

J, K, T, E (factory set)

Ranges:
J = -200 to 760°C
K = -150 to 1250°C
T = -200 to 400°C
E = -100 to 1000°C
Resolution: ±1°
Overall Accuracy (Error from all
sources) from 0 to 40°C Ambient:

±1.0°C Typical

Input Impedance: 100 MΩ minimum
Lead Resistance Effect:

<20µV per 350Ω Open
thermocouple and overrange
indication

Input Burnout: Protection to 250 Vac
User Selectable: °C or °F
D5450 THERMISTOR INPUTS
Thermistor Types: 2252Ω at 25°C
Range: 0 to 100°C
Resolution: 0.01°C or °F
Accuracy: ± 0.1°C
Input Protection: to 30 Vdc
User Selectable: °C or °F

OMEGACARESM extended

Extended Warranty

Program

SM

warranty program is available for
models shown on this page. Ask
your sales representative for full
details when placing an order.
OMEGACARE
labor and equivalent loaners.

SM

covers parts,

To Order

RS-232C Output RS-485 Output
Model Number Model Number Input

D5111 D5112 100 mV
D5121 D5122 1 V
D5131 D5132 5 V
D5141 D5142 10 V
D5151 D5152 100 V
D5251 D5252 4-20 mA
D5311 D5312 J (Iron-Constantan)
D5321 D5322 K (Chromel-Alumel)
D5331 D5332 T (Copper-Constantan)
D5341 D5342 E (Chromel-Constantan)
D5451 D5452 2252Ω Thermistor

Each unit is supplied with a CD ROM that includes a complete operator’s manual and Windows setup software.
Ordering Example: D5111 four channel 100 mV input module with RS-232C output and OCW-1, OMEGACARESM extends standard 1-year

warranty to a total of 2 years.

Accessories

Model Number Description

A1000 RS-232 to RS-485 converter, 115 Vac power
A1000-230 RS-232 to RS-485 converter, 230 Vac power
A1000-CABLE 1.5 m (5') cable, male to female
A2000 RS-232 to RS-485 converter, 10 to 30 Vdc power
D1000-C9 1.8 m (6') RS-232 cable for D5000, (DB9F connector one end, other end stripped)

Each unit supplied with operator’s manual. 5000 Series modules are also available with Modbus RTU protocol. To order modules with Modbus
RTU protocol, add suffix “M” at the end of the model number, no additional charge.

Ordering Example: A1000 RS-232 to RS-485 converter, 115 Vac power, and OCW-1, OMEGACARE SM extends standard 1-year warranty to
a total of 2 years.

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