Omega Products LDX-2 User Manual
LOOP-POWERED DISPLACEMENT
LDX-2 WIRING DIAGRAM LINE ART
TRANSMITTERS
WITH EXCITATION
WORKS WITH AC LVDT TRANSDUCERS
LVDT Signal Conditioner
Loop Powered
LDX-2
U Wide Input Range of
30 to 530 mV/V
U Rugged Sealed Housing
U 2-Wire, 4 to 20 mA Signal
for Remote Locations
U 0.02% of Reading
Accuracy
U Powers AC LVDTs and
Converts Signal to
Standard 4 to 20 mA
Signal
The LDX-2 linear displacement
transmitter is a 2-wire, 4 to
20 mA conditioner for AC LVDT
transducers. It is designed for use
where long transmission distances
are required before the signal can
interface with a controller or meter.
A feature of 2-wire operation is
its low susceptibility to noise and
cable resistance, ideal for industrial
environments.
Two-wire operation enables both
power and signal to use the same
pair of wires. The position of the
transducer is indicated by the
amount of current, from 4 to 20 mA
full scale. If a cable break occurs,
zero current is indicated, thereby
showing a fault.
The LDX-2 is housed in an ABS
impact-resistant plastic case with
2 water-resistant ports for the
transducer cable and supply cable.
The box is sealed to NEMA 12
(IP65) standards and is supplied
with mounting nuts for a DIN 462771
rail, or it can be bolted to any
surface without affecting the seal.
LDX-2, shown smaller than actual size.
WIRING DIAGRAM
PRIMARY
TRANSDUCER
SECONDARY
4 to 20 mA, 2-WIRE
1
2
3
4
SPECIFICATIONS
ELECTRICAL
Power Supply: 13 to 48 Vdc,
up to 30 mA
Supply Protection: Reverse polarity
protected
Transducer Drive: 0.9 Vrms @ 5 kHz
nominal, 13 kHz switchable
Oscillator Protection: Open and short
circuit protected
Transducer Sensitivity Range:
30 to 530 mV/V in 2 coarse
gain positions
Range of Gain Control: 3.5 to 1
switched, 5 to 1 adjustable
Range of Zero Control: Up to 100%
on max gain
Output Current: 4 to 20 mA 2-wire or
0 to 20 mA 3-wire
Output Impedance: Effectively infinite
Output Protection: Open and short
circuit protected
Output Ripple: <50 µA p-p
@ 10 kHz
To Order
MODEL NO. DESCRIPTION
LDX-2 Loop-powered signal conditioner for AC LVDTs
Comes complete with operator’s manual.
Ordering Example: LDX-2, loop-powered signal conditioner for AC LVDTs.
Visit omega.com/ldx-2 for Pricing and Details
DISPLAY
+V 0 to 20 mA
7
+V 4 mA
6
0 V
5
Output Filter: Cutoff frequency -3 dB
@ 25 Hz second-order linearity: <0.02%
Operating Temperature Range:
0 to 70°C (32 to 158°F)
Storage Temperature Range:
-40 to 80°C (-40 to 176°F)
Temperature Coefficient:
Zero: Better than 0.01% FS/°C
Gain: Better than 0.01% FS/°C
Long-Term Stability:
Zero: 0.2%/year typical
Gain: 0.3%/year typical
Effect of Supply Change: Negligible
Terminations: Screw terminals; access
through 2 cable ports for wires
1 to 5 mm (0.04 to 0.2") diameter
MECHANICAL
Weight: 220 g (7.7 oz)
Mounting: Through holes in base by
2 screws and nuts; can be mounted to
DIN 46277-1 rail
Accessories: 2 fixing screws and nuts
Environment: Sealed to NEMA 12 (IP65)
Dimensions: 120.65 H x 80 W x 54.86 mm D
(4.75 x 3.14 x 2.16")
+V SUPPLY
0 V
J-19
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