Omega Products DRLP-ITC-J User Manual

Isolated DIN Rail Mount Loop-Powered
2-Wire Signal Conditioners

DRLP Series

U ±0.03% Accuracy (Typical)
U ±0.01% Linearity
U 1500Vrms Transformer Isolation

and 240Vrms Field-Side Protection

U ANSI/IEEE C37.90.1 Transient Protection
U Wide Loop Supply Voltage, 10.8V to 60V
U 5-Pole Low-Pass Filtering
U Up to 160 dB CMR
U 85dB NMR at 60Hz, 80dB at 50Hz
U Protected Against Reverse Connection of

Loop Voltage

U -40 to 80°C (-40 to 176°F) Operating Temperature
U Mounts on DIN Rail EN 50022, 35 x 7.5 or 35 x 15
U CSA C/US Certified (Class I, Division 2, Groups

A, B, C, D)

U CE Compliant
U Manufactured per RoHS Directive 2002/95/EC

The new DRLP Series of loop powered 2-wire
transmitters consists of seven family groups with a
total of 48 transmitter models that interface to a wide
variety of voltage, current, temperature and position
measuring devices. The DRLP Series provides
superior specifications such as ±0.03% accuracy, five
poles of filtering, 1500 Vrms continuous isolation, low
output noise, and much more.

The DRLP Series 2-wire transmitter conditions and
sends analog signals from sensors located in the
“field” to monitoring and control equipment, usually
computers, located thousands of feet away in central
control areas. The DRLP Series accepts a wide
range of inputs, including millivolt, volt, milliamp,
thermocouple, RTD, potentiometer, and slide wire.
It operates on power from a 2-wire signal loop and
modulates the supply current to represent the input
signal within a 4 to 20-milliamp range.

Two-wire transmission loops are very economical
methods for connecting sensors to distant control
rooms. Since the DRLP Series operates from the
signal loop current, no additional, expensive power
and wiring are required. Only low cost, twisted pair
wiring is needed.

DRLP wiring diagram

®



DRLP Series shown
smaller than actual size.

DRLP Loop Drive Capability

The DRLP Series transmitter’s wide range of loop
supply voltage (10.8V to 60V) makes it a versatile
device which can be used in most any current loop.
The maximum loop resistance is determined by
subtracting the transmitter’s minimum loop supply
voltage from the total loop supply voltage and dividing
the result by the maximum loop current (see graph).

The low loop supply voltage of 10.8V allows the DRLP
to be used in applications with low output power supplies
and the high Loop Supply Voltage of 60V allows use in
applications with long distance current loops.

Loop Supply (V)

COMMON SPECIFICATIONS

Input Protection

Continuous: 240 Vrms maximum
Transient: ANSI/IEEE C37.90.1

CMV, Input to Output
Continuous: 1500 Vrms maximum
Transient: ANSI/IEEE C37.90.1

Noise

Output: 100 kHz: 3μArms
Output Range: 4 to 20 mA
Output Protection

Reverse Polarity: Continuous
Over-Voltage: 240 Vrms continuous
Transient: ANSI/IEEE C37.90.1

Loop Supply Voltage: 10.8V to 60V
Loop Supply Sensitivity: ±0.0005%/V

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Turn-On Delay: 400 ms
Environmental

Operating Temperature Range: -40 to 80°C
(-40 to 176°F)
Storage Temperature Range: -40 to 80°C
(-40 to 176°F)

Relative Humidity: 0 to 95% non-condensing
Emissions EN61000-6-4: ISM, Group 1

Radiated, Conducted: Class A

DRLP-MV/DRLP-V

DIN Rail Loop Powered

Analog Voltage Input Transmitters

U Accepts Millivolt and Voltage Level Signals
U Process Current Output
U 1500 Vrms Transformer Isolation
U ANSI/IEEE C37.90.1 Transient Protection
U Input and Output Protected to 240 Vac Continuous
U Up to 60V Loop Voltage
U 160 dB CMR
U 85 dB NMR at 60 Hz, 80 dB at 50 Hz
U ±0.03% Accuracy
U ±0.01% Linearity
U Easily Mounts on Standard DIN Rail
U CSA C/US Certified
U CE Compliant

Immunity EN61000-6-2: ISM, Group 1
RF: Performance A ±0.5% span error
ESD, EFT: Performance B

Mechanical Dimensions: 75 H x 22.5 W x 105 mm D
(2.95 x 0.89 x 4.13")

Mounting: DIN EN 50022 35 x 7.5 mm or
35 x 15 mm rail

Each DRLP-MV and DRLP-V voltage input transmitter
provides a single channel of analog input which
is filtered, isolated, amplified, and converted to a
process current output (Figure 1). Signal filtering is
accomplished with a five-pole filter, which provides
85 dB of normal-mode rejection at 60 Hz and 80 dB at
50 Hz. An anti-aliasing pole is located on the field side
of the isolation barrier, and the other four are on the
process loop side. After the initial field-side filtering,
the input signal is chopped by a proprietary chopper
circuit. Isolation is provided by transformer coupling,
again using a proprietary technique to suppress
transmission of common mode spikes or surges.

Dimensions: mm (inch)

75

(2.95)

22.5

(0.89)

105

(4.13)

DRLP-MV shown actual size.

Special input and output circuits on the DRLP-MV
and DRLP-V transmitters provide protection against
accidental connection of power-line voltages up to
240VAC and against transient events as defined by
ANSI/IEEE C37.90.1. Signal and loop power lines are
secured to the module using screw terminals, which
are in pluggable terminal blocks for ease of system
assembly and reconfiguration.

The modules have excellent stability over time and
do not require recalibration, however, zero and span
settings are adjustable up to ±10% to accommodate
situations where fine-tuning is desired. The
adjustments are made using potentiometers located
under the front panel label and are non-interactive for
ease of use.

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Figure 1: DRLP-MV/DRLP-V Block Diagram

Specifications

Typical at TA = +25°C and +24V Loop Voltage-V
Input Range:

DRLP-MV: ±10 mV to ±100 mV
DRLP-V: ±1V to ±20V

Input Bias Current:

DRLP-MV: ±0.5nA
DRLP-V: ±0.05nA

Input Resistance
Normal

DRLP-MV: 50 MΩ
DRLP-V: 2 MΩ

Power Off
DRLP-MV: 66 kΩ
DRLP-V: 2 MΩ

Overload
DRLP-MV: 66 kΩ
DRLP-V: 2 MΩ

CMR (50 or 60 Hz): 160 dB
NMR: 85 dB at 60 Hz, 80 dB at 50 Hz
Adjustability: ±10% zero and span
Accuracy*: ±0.03%
Conformity: ±0.01%
Stability

Offset: ±20 ppm/°C
Gain: ±80 ppm/°C
Bandwidth, -3dB: 3 Hz
Response Time, 90% Span: 165 ms
Output Limits
Under-Range: 2.8 mA
Over-Range: 29 mA

* Includes linearity, hysteresis and repeatability.

DRLP-V shown actual size.

To Order

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MODEL NO. INPUT RANGE

DRLP-MV1 ±10 mV

DRLP-MV2 ±50 mV

DRLP-MV3 ±100 mV

DRLP-MV4 0 to 10 mV

DRLP-MV5 0 to 50 mV

DRLP-MV6 0 to 100 mV

DRLP-V1 ±1V

DRLP-V2 ±5V

DRLP-V3 ±10V

DRLP-V4 0 to 1V

DRLP-V5 0 to 5V

DRLP-V6 0 to 10V

DRLP-V7 ±20V

DRLP-V8 0 to 20V

Accessories

MODEL NO. DESCRIPTION

RAIL-35-1 35 mm DIN rail, 1 m (3.3') length

RAIL-35-2 35 mm DIN rail, 2 m (6.6') length

Ordering Example: DRLP-V5 isolated DIN rail mount loop­powered 2-wire signal conditioner with 0 to 5 V input and 4 to
20 mA output and OCW-1 OMEGECARE 1-year extended warranty
(adds 1 year to standard 1 year warranty).

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