Omega Products DRA-RTT-2 User Manual

DIN Rail Mount 2-Wire RTD Input Signal Conditioner

A/IN

A/OUT

Extended Warranty

Program

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DRA-RTT-2

⻬ ±0.1% Accuracy
⻬ Linearized
⻬ Field Rangeable
⻬ Non-Isolated
⻬ Economical

DRA-RTT-2 is a non-isolated signal conditioner that
accepts 100 Ω Platinum RTD input and converts this
into a 4 to 20 mA process current output which is
linearly proportional to temperature. These signal
conditioners incorporate excellent lead wire
compensation and linearization circuitry.

Field ranging is accomplished by using an internal DIP
switch array for coarse range setting and front panel
accessible multi-turn zero and span potentiometers for
fine tuning. Test terminals are provided to monitor the
transmitter’s 4 to 20 mA output without disturbing the
actual process loop.

DRA-RTT-2

1

Specifications

Input: 3-wire Pt 100 RTD, a = 0.00385, according

to DIN 43760/BS1904

Input Span Range: 30 to 810°C (86 to 1490°F)
Input Zero Range: -55 to 202°C (-67 to 395°F)
Field Ranging: Done by three “zero” DIP switches,

three “span” DIP switches and two fine tuning
potentiometers

RTD Sensor Lead Resistance: < 50 Ω (two ways)
Lead Compensation Error: < ±0.05°C/10 Ω

lead resistance

Sensor Excitation: < 1 mA
Output: 4 to 20 mA
Test Terminals: 40 to 200 mV represents 4 to 20 mA
Supply Voltage: 10 to 36 Vdc
Supply Variation Effect: < ±0.03% of span for

full change
Accuracy: < ±0.1% of span (including linearity,

hysteresis and repeatability)

Loop Resistance: Rmax (Ω) = (Vsupply - 10)/0.02
Temperature Stability: < ±0.015% of span/°C

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

SM

covers parts, labor and

To Order, Call or Shop Online at omega.com

Ambient Temperature Range: -20 to 70°C

(-4 to 158°F), 5 to 95% RH
Storage Temperature Range: -30 to 85°C

(-22 to 185°F)

Enclosure: Polycarbonate, IP40 protection
Terminal Housing: Polycarbonate, IP20 protection
Mounting: 35 mm DIN rail
Dimensions: 90 H x 17.5 W x 58 mm D

(3.54 x 0.7 x 2.28" )
Weight: 70 g (2.5 oz)

AVAILABLE FOR FAST DELIVERY!

To Order (Visit omega.com/dra-rtt-2

for Pricing and Details)

Model No. Description

DRA-RTT-2 Non-isolated RTD input

signal conditioner

iDRN-PS-1000 Power supply, 95 to 240 Vac

input, 24 Vdc @ 1 A output

Comes complete with operator’s manual.
Ordering Example: DRA-RTT-2, non-isolated RTD input signal

conditioner and OMEGACARE 2-year extended warranty for
DRA-RTT-2 (adds 2 years to standard 1 year warranty)
and iDRN-PS-1000 power supply.

SM