LiM-420 – Current Output, LVDT/RVDT OEM Signal Transmitter
LiM 4-20 Rev. 5 www.meas-spec.com 2015-July
1/3
Low cost OEM 4-20mA (3-wire) transmitter
Very compact, open PC board design
DIP switch selectable coarse gain
Zero and span adjustment potentiometers
18 to 30VD C supply voltage
-25o to +85oC operating temperature range
Card-edge or barrier strip connections
Works with very low input impedance LVDTs
and RVDTs
DESCRIPTION
The LiM-420 is an LVDT/RVDT signal conditioning transmitter specifically designed for the OEM marketplace.
Operating on an 18 to 30V DC unipolar supply voltage, the LiM-420 de livers a lo w noise 4 to 20m A outp ut s ig nal.
Compatible with many 5 and 6 electrical connection LVDT and RVDT transducers (see specifications), this
compact transm itter provides excellent performance on a budget. A generous excitation drive current of 20mA,
allowing opera t ion w ith transducer input impedances as low as 175 Ohms.
The LiM-420 is desig ned for easy installation, plugged into a b ackplane-type connector, or with individual wires
connecte d to th e scr ew ter m inal barrier strip. Measuring les s than 2.5x2.5 inc hes, the LiM-420 may be mounte d
or stacked using the permanently attached threaded standoffs, or card-edge guides. All six selectable gain
ranges are easily accessed via DIP switches and two multi-turn potentiometers allow for fine zero and gain
adjustments.
Also see our other LVDT/RVDT signal conditioner models:
LVM-110 ±12 to ±15VDC supply, multiple uni-polar and bipolar selectable DC voltage outputs
LDM-1000 10 to 30VDC supply, DC voltage and 4 to 20mA outputs, DIN rail mountable
ATA-2001 Line powered, DC voltage and current outputs, push-button programmable
IEM-422 Line powered, 4-20mA output, NEMA-13 rated enclosure
PML-1000 AC or DC supply, DC voltage, current and RS485 outputs, 1/8th DIN panel meter,
MP-2000 Line-powered, analog DC & RS232 outputs, ¼ DIN, dual channel set point controller with bit-
mapped display
Measurement Specialties, Inc. (NASDAQ MEAS) offers many other types of sensors and signal conditioners.
Data sheets can be downloaded from our web site at: http://www.meas-spec.com/datasheets.aspx
MEAS acquired Schaevitz Sensors and the SchaevitzTM trademark in 2000.
FEATURES APPLICATIONS
Low cost/high performance
Wide operating temperature range
Six selectab le ga in ranges
20-turn zero & gain adjus tment potentiometers
Threaded standoffs for panel/box mounting
Valve position feedback
Roller gap sensing
Paper head box position
Coater knife gap
Materials testing machines
LiM-420 – Current Output, LVDT/RVDT OEM Signal Transmitter
LiM 4-20 Rev. 5 www.meas-spec.com 2015-July
2/3
PERFORMANCE SPECIFICATIONS
ELECTRICAL SPECIFICATIONS
Supply voltage
18 to 30VDC (unipolar)
Supply current
50mA maximum
Output range
4 to 20mA
Temperature coeff ici ent of output
±0.02% of FSO per ºF [±0.036% of FSO per ºC] over operating temperature range
Maximum loop resistance
500Ω (with 24VDC supply)
Output noise and ripple
25µA RMS maximum
Frequency response
50Hz @ -3 dB
Non-linearity
±0.05% of FSO
Stability
±0.05% of FSO maximum (after 30 minute warm-up)
Zero adjustment range
±2.5mA
Transducer excitation
Voltage
3.5 VRMS ±10%, sine wave
Current
20mA RMS maximum
Frequency
2.5kHz
Transducer requirements
Transducer type
LVDT or RVDT with 5 or 6 electrical connections
LVDT/RVDT input impedance
175 minimum
LVDT/RVDT output range
0.1 to 5.6 VRMS for 20mA full scale output
ENVIRONMENTAL AND MECHANICAL SPECIFICATIONS
Operating temperature range
-13°F to +185°F [-25°C to 85°C]
Storage temperature range
-40°F to +257°F [-40°C to 125°C]
Gain adjustment
6 DIP switch selectable ranges; 20-turn fine adjustment potentiometer
Zero adjustment
20-turn fine adjustment potentiometer
Electrical connections
PC board edge (to backpl ane-type connector)
or barrier terminal strip (accepts AWG 14 to 30 wire sizes)
Mounting
Use the att ach ed thr ead ed sta ndoff s or card-edge guides
Notes:
All values are nominal unless otherwise noted
FSO (Full Scale Output) is the largest absolute value of the outputs measured at the range ends
WIRING SCHEMATIC & LOOP RESISTANCE (LOAD)
LiM-420 – Current Output, LVDT/RVDT OEM Signal Transmitter
LiM 4-20 Rev. 5 www.meas-spec.com 2015-July
3/3
DIMENSIONS
ORDERING INFORMATION
Description
Part Number
LVDT/RVDT 4-20mA Output, OEM Transmitter Module
72290000-000
Mating Connector (sold separately)
62105012-000
Cable to connect HCA/HCI/GCA/R36AS to LiM4-20 (1)
04290417-000
Extension cable to connect LBB (option -001) to LiM4-20 (1)
04290582-000
(1) All cables are shielded, 10 foot long, and rated 80°C [176°F]. Consult factory for other l engths.
Download the operation manual at: http://www.meas-spec.com/manuals.aspx
TECHNICAL CONTACT INFORMATION
NORTH AMERICA
EUROPE
ASIA
Measurement Specialties, Inc.
1000 Lucas Way
Hampton, VA 23666
United States
Phone: +1-800-745-8008
Fax: +1-757-766-4297
Email: sales@meas-spec.com
Web: www.meas-spec.com
MEAS Deutschland GmbH
Hauert 13
D-44227 Dortmund
Germany
Phone: +49-(0)231-9740-0
Fax: +49-(0)231-9740-20
Email: info.de@meas-spec.com
Web: www.meas-spec.com
Measurement Specialties China Ltd.
No. 26, Langshan Road
High-tech Park (North)
Nanshan District, Shenzhen 518057
China
Phone: +86-755-33305088
Fax: +86-755-33305099
Email: info.cn@meas-spec.com
Web: www.meas-spec.com
The information in this sheet has been carefully reviewed and is believed to be accurate; however, no responsibility is assumed for
inaccuracies. Furthermore, this information does not convey to the purchaser of such devices any license under the patent rights to the
manufacturer. Measurem ent Specialt ies, I nc. reserves the right to make c hanges without further not ic e to any product herein. Measurement
Specialti es, Inc. makes no warran ty, represent ation or guarantee re garding the suit ability of its product f or any pa rticular purpos e, nor does
Measurement Specialties, Inc. assume any liability arising out of the application or use of any product or circuit and specifically disclaims
any and all liability, including without limitation consequential or incidental damages. Typical parameters can and do vary in different
applications. All operating parameters must be validated for each customer application by customer’s technical experts. Measurement
Specialti es, Inc. does not convey any lic ense under its patent rights nor the rights of others.
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
TE Connectivity:
04290582-000 72290000-000 62105012-000