Omega Products DRA-RTI-2 User Manual
DIN Rail 2-Wire
Temperature Transmitters
DRA-TCI-2 Thermocouple Input Model
DRA-RTI-2 RTD Input Model
H-59
$
170
Basic Unit
U Isolated
U Linearized
U Field Rangeable
Models DRA-TCI-2 and
DRA-RTI-2 are linearized
temperature transmitters that
produce a 4-20 mA process signal
that is directly proportional to
temperature. These transmitters
have exceptionally high input to
output common mode rejection
(CMR), a high degree of filtering
that eliminates false output signals
and provides a low ripple current.
Model DRA-TCI-2 is available for
thermocouple types J, K, T, E, R, S
or B and provides exceptional
temperature linearization by
applying eight segment linearization
circuitry.
Model DRA-RTD-2 accepts
2 or 3 wire Pt-100 RTDs,
alpha = 0.00385. Both models are
field rangeable using a set of six
internal dip switches for coarse
ranging and front accessible zero
and span potentiometers for fine
adjustment. Test terminals are
provided to monitor the transmitter’s
4-20 mA output without disturbing
the actual process loop.
Specifications
COMMON SPECIFICATIONS
Output: 4 to 20 mA
Supply Voltage: 10-40 Vdc
Loop Resistance: R
max
(ohms) =
(V
supply
- 10) / 0.02
Temperature Stability: <±0.1% of
span/°C
Common Mode Rejection (CMR):
127 dB typical dc to 60 Hz
Isolation:1500 Vdc or peak ac
Response Time: 160 msec
(0 to 98%)
Test Terminals: 40 to 200 mV
represents 4-20 mA
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)
Field Ranging: done by three
“zero” DIP switches, three “span”
DIP switches and two fine tuning
potentiometers
Enclosure: polycarbonate,
IP40 protection
Each unit supplied with complete owner’s manual. *Specify thermocouple type
J,K,T,E,R,S, or B.
Ordering Example: DRA-TCI-2-J DIN rail 2-wire J thermocouple input temperature
transmitter with DRN-PS-1000 power supply, $210 +150 = $360.
Type Input Range Low, Input Range High, Min Span
°F (°C) °F (°C) °F (°C)
K 32 (0) 2462 (1350) 180 (100)
J 32 (0) 1400 (760) 180 (100)
T 32 (0) 752 (400) 180 (100)
E 32 (0) 1832 (1000) 180 (100)
R 32 (0) 3092 (1700) 1170 (650)
S 32 (0) 3092 (1700) 1170 (650)
B 32 (0) 3092 (1700) 1170 (650)
Thermocouple Input Types and Ranges
Terminal Housing:
polycarbonate, IP20 protection
Mounting: 35 mm DIN rail
Dimensions: 3.23" H x 0.9"
W x 3.90" D (82 x 22.5 x 99 mm)
Weight: 4.6 oz. (130 g
Model DRA-TCI-2 Input:
Thermocouple types J, K, T,
E,R,S,B (see thermocouple input
types and ranges table)
Burnout Protection: upscale
Cold Junction Error: ±0.9°C
typical for 0 to 60°C ambient
change (±3°C for types R and S)
Accuracy (Including Linearity):
±0.08% of span for type K,
±0.1% to ±0.2% for other
thermocouple types, typical
MODEL DRA-RTI-2
Input: 2 or 3-wire Pt-100 RTD,
alpha = 0.00385
Accuracy (Including Linearity,
Hysteresis and Repeatability):
<±0.1% of span
Minimum Span: 79°F (26°C)
Input Span Range:
79 to 1490°F (26 to 810°C)
adjusted by three DIP switches
and span potentiometer
Input Zero Range:
-80 to 450°F (-62 to 232°C)
adjusted by three DIP switches
and zero potentiometer
Lead Compensation Error:
<0.1°C/20 Ohms lead resistance
Sensor Excitation: 1 mA
To Order
(Specify Model Number)
Model No. Price Description
DRA-TCI-2-(*) $210 DIN rail 2-wire thermocouple input temperature transmitter
DRA-RTI-2 170 DIN rail 2-wire RTD input temperature transmitter
DRN-PS-1000 150 Power supply, 95-240 Vac input, 24 Vdc @ 1A output
OMEGA
CARE
SM
Extended Warranty
Program
A/IN
A/OUT
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