DRF-LC Load Cell Input Signal Conditioner

DRF-LC

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For Load Cells with 1 mV/V, 2 mV/V
and 3 mV/V Output
Full Scale at 10 mV, 20 mV and 30 mV
Pre-tare Jumpers at 50%, 25% and 0%
Accuracy 0.2%
Response Time < 75 ms
Galvanic Isolation between Input, Output and Power

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Description

The DRF series DIN rail signal conditioners are designed to accept a broad range of input signals, such as AC and DC voltage and current, frequency, temperature (thermocouple and RTD), and process transducers, and provide standard process outputs of either 4 to 20 mA, or 0 to 10 Vdc. The DRF series feature a modern housing design, that is easily mounted on standard 35 mm DIN rails. Connections are safely and securely made through pluggable screw terminal connectors, with input and output connections on the opposite sides of the module.

The DRF-LC signal conditioner accepts a load cell input and provides an isolated 0 to 10 Vdc or 4 to 20 mA output. Models are available with three different power options, 24 Vdc, 120 Vac and 240 Vac.

The DRF-LC are ideally suited for industrial applications. The DRF-LC feature galvanic isolation between input, output and power up to 3500 Veff (model specific). Module response time is 75 ms or less.

The FAR-1 power supply is an ideal companion product for the DRF-LC. It provides a regulated 10Vdc output that may be used to power up to 4 load cells.

Range Code Table

Range Code	Range
10MV	0 to 10 mV
20MV	0 to 20 mV
30MV	0 to 30 mV

SPECIFICATIONS

Accuracy: <0.2% full scale
Linearity: <<0.1% full scale
Thermal Drift: 250 ppm/°C typical (max <200ppm/°C)
Response Time: <75 mS (90% of signal)
Bandwith: 20 Hz (-3dB)
Pretare: 50%, 25% and 0% by jumpers
Impedance: 5 M Ω
Over Range Protection: 15 V max differential input

Power: 24 Vdc ±10%, 230 Vac ±10% 50/60 Hz, 115 Vac ±10% 50/60 Hz
Power Consumption: <3.8 VA

Output: 4 to 20 mA and 0 to 10 Vdc
Maximum Voltage Output: 11 Vdc approx.
Minimum Voltage Output: -1 Vdc approx.
Minimum Load Resistance (Voltage): >1 KΩ Maximum Current Output: 22 mA approx.
Maximum Current Output: -1.5 mA approx.
Maximum Load Resistance (current): >400 Ω

Electrical Connections: Plug-in screw terminals
Protection: IP-30

MECHANICAL DIMENSIONS
Weight:
(DC Powered Models): 120 g (4.2 oz)
(AC Powered Models): 200 g (7 oz)
Dimensions:
(DC Powered models):
110 H x 22.5 W x 93 mm D (4.3 x 0.9 x 3.7")
(AC Powered models):
110 H x 37 W x 93 mm D (4.3 x 1.46 x 3.7")
Operating Temperature: 0 to 60°C (32 to 140°F)
Storage Temperature: -20 to 70°C (-4 to 158°F)

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Part Number/ Desc.

Qty

Description

Below are examples of popular models. See the Part Number Builder to order any available model.

DRF-LC-115VAC-30MV-4/20

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Availability:

Load cell signal conditioner with 0 to 30mV input and 4 to 20 mA output, 115 Vac power

DRF-LC-24VDC-20MV-0/10

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Availability:

Load cell signal conditioner with 0 to 20mV input and 0 to 10V output, 24 Vdc power

† All amounts shown in AUD

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DRF-LC-		-		-

Option Descriptions:

(1) Power select from:
24VDC for 24Vdc power
115VAC for 115Vac power
230VAC for 230Vac power

(2) Input Range Code select from:
10MV for 0 to 10 mV
20MV for 0 to 20 mV
30MV for 0 to 30 mV

(3) Output select from:
4/20 for 4 to 20mA
0/10 for 0 to 10Vdc

Note: All combinations may not be valid, check spec sheet for valid part numbers.