Omega Products DRA-RTM-8 User Manual
H-62
H
To Order
(Specify Model Number)
Model No. Price Description
DRA-RTM-8 $900 Analog multiplexer
DRN-PS-1000 150 Power supply, 95-240 Vac input, 24 Vdc
@ 1A output
DRA-RTM-8 16-Channel Analog
Multiplexer
U Eight 3-Wire 100 Ohm
Platinum RTD Inputs
U Eight 4-20 mA Process
Inputs
U All 16 Inputs are
Multiplexed into a Single
4-20 mA Output
U 100 Ohm Platinum
Linearization and Lead
Length Compensation
for RTD Inputs
Comes with complete operator’s manual.
Ordering Example: DRA-RTM-8 analog multiplexer with DRN-PS-1000 power supply,
$900 + 150 = $1050.
Model DRA-RTM-8
$
900
The DRA-RTM-8 is a 16 channel
analog multiplexer. Eight channels
accept 3-wire 100 Ohm Pt RTD
inputs, and the other eight channels
accept 4-20 mA process inputs. All
16 inputs are multiplexed into a
single 4-20 mA current loop output.
The selection function is performed
via four binary control lines
generated by the host controller
(PLC program).
Model DRA-RTM-8 is an all solid
state unit that multiplexes the input
channels at a switching time of less
than 20 microseconds. Each of the
RTD inputs is completely signal
conditioned including a 6 dip-switch
array for coarse channel ranging as
well as zero and span trimmers on
the front panel for fine ranging.
Special attention is given to the lead
length compensation parameter
because, unlike ordinary
transmitters, the DRA-RTM-8 could
be mounted relatively far from the
RTD sensors. The 4-20 mA output
Specifications
GENERAL
Accuracy: ±0.1% of span max
Switching Time: < 20
microseconds (resistive load)
Indicators: 8 red LEDs for current
inputs, one yellow power on LED
Supply Voltage: 24 Vdc ± 10%
regulated
Operating Current Consumption:
90 mA ± 10 mA
Temperature Stability: ±0.01% of
span/1°C
Operating Ambient: 0 to 60°C
(32 to 140°F), 5 to 95% RH
noncondensing
Storage Temperature: -25 to 85°C
(-13 to 185°F)
Enclosure: polycarbonate
Mounting: standard 35 mm DIN rail
or wall mount
from the DRA-RTM-8 is linearized to
the RTD input.
The DRA-RTM-8’s superb accuracy
and simple operation make it a very
attractive unit allowing tremendous
cost savings by reducing the need
for expensive PLC or data
acquisition analog inputs.
Weight: 0.9 kg (2.0 lb)
Dimensions: 73 H x 200 W x 121
mm D (2.88" x 7.88" x 4.76")
RTD INPUTS
RTD Inputs: eight 3-wire 100 Ω
Platinum, a = 0.00385
Current Excitation: < 1.1 mA
Zero: -50 to 200°C (-58 to 392°F)
Span: 50 to 750°C (122 to 1382°F)
Lead Compensation: 0.025°C/10 Ω
lead resistance max error
Lead Resistance: 60 Ω one way max
PROCESS INPUTS
Process Inputs: eight, 4-20 mA/
0-20 mA
Input Current: 30 mA max
Reverse Polarity Protection: yes
CONTROL INPUTS
Digital Inputs: 4 address,
1 enable/self-test
Logic: true high or true low
(user selectable)
Digital Logic Levels: Vin “low” <
0.5V 5V < Vin “high” < 60 V
OUTPUT
Analog Output: selected, 4-20 mA
current loop
A/IN
A/OUT
SM
OMEGA
CARE
Extended Warranty
Program
One Omega Drive | Stamford, CT 06907 | 1-888-TC-OMEGA (1-888-826-6342) | info@omega.com
EPG05
www.omega.com
UNITED KINGDOM
www. omega.co.uk
Manchester, England
0800-488-488
UNITED STATES
www.omega.com
1-800-TC-OMEGA
Stamford, CT.
CANADA
www.omega.ca
Laval(Quebec)
1-800-TC-OMEGA
GERMANY
www.omega.de
Deckenpfronn, Germany
0800-8266342
Karviná, Czech Republic
FRANCE
www.omega.fr
Guyancourt, France
088-466-342
CZECH REPUBLIC
www.omegaeng.cz
596-311-899
BENELUX
www.omega.nl
Amstelveen, NL
0800-099-33-44
More than 100,000 Products Available!
Temperature
Calibrators, Connectors, General Test and Measurement
Instruments, Glass Bulb Thermometers, Handheld Instruments
for Temperature Measurement, Ice Point References,
Indicating Labels, Crayons, Cements and Lacquers, Infrared
Temperature Measurement Instruments, Recorders Relative
Humidity Measurement Instruments, RTD Probes, Elements
and Assemblies, Temperature & Process Meters, Timers and
Counters, Temperature and Process Controllers and Power
Switching Devices, Thermistor Elements, Probes and
Assemblies,Thermocouples Thermowells and Head and Well
Assemblies, Transmitters, Wire
Flow and Level
Air Velocity Indicators, Doppler Flowmeters, Level
Measurement, Magnetic Flowmeters, Mass Flowmeters,
Pitot Tubes, Pumps, Rotameters, Turbine and Paddle Wheel
Flowmeters, Ultrasonic Flowmeters, Valves, Variable Area
Flowmeters, Vortex Shedding Flowmeters
pH and Conductivity
Conductivity Instrumentation, Dissolved Oxygen
Instrumentation, Environmental Instrumentation, pH
Electrodes and Instruments, Water and Soil Analysis
Instrumentation
Data Acquisition
Auto-Dialers and Alarm Monitoring Systems,
Communication Products and Converters, Data
Acquisition and Analysis Software, Data Loggers
Plug-in Cards, Signal Conditioners, USB, RS232, RS485
and Parallel Port Data Acquisition Systems, Wireless
Transmitters and Receivers
Pressure, Strain and Force
Displacement Transducers, Dynamic Measurement
Force Sensors, Instrumentation for Pressure and Strain
Measurements, Load Cells, Pressure Gauges, Pressure
Reference Section, Pressure Switches, Pressure Transducers,
Proximity Transducers, Regulators,
Strain Gages, Torque Transducers, Valves
Heaters
Band Heaters, Cartridge Heaters, Circulation Heaters,
Comfort Heaters, Controllers, Meters and Switching
Devices, Flexible Heaters, General Test and Measurement
Instruments, Heater Hook-up Wire, Heating Cable
Systems, Immersion Heaters, Process Air and Duct,
Heaters, Radiant Heaters, Strip Heaters, Tubular Heaters
click here to go to the omega.com home page
Loading...