ES-1357 Rev.5
LC2
Plug-in Signal Conditioners M-UNIT
STRAIN GAUGE TRANSMITTER
(remote sensing; non-isolated)
Functions & Features
• Provides a DC output signal compatible with a bridge type strain gauge utilized in load cells, pressure transducers
• Six-wire remote sensing compensates for lead resistance variations
• Excitation adjustable from 2 V to 5 V
• Wide-range adjustment: 0 – 80 % for zero, 100 – 20 % for span
• High-density mounting
Typical Applications
• Weighing system for tanks, hoppers, silos
• Weighing system using cranes
• Float level meter utilizing strain gauges
MODEL: LC2–[1][2]–[3][4]
ORDERING INFORMATION
• Code number: LC2-[1][2]-[3][4]
Specify a code from below for each of [1] through [4].
(e.g. LC2-2A-B/E/K/Q)
• Special output range (For codes Z & 0)
• Specify the specification for option code /Q
(e.g. /C01/S01)
[1] INPUT STRAIN GAUGE
1
: 1 mV/V
12
: 1.25 mV/V
15
: 1.5 mV/V
2
: 2 mV/V
3
: 3 mV/V
4
: 4 mV/V
5
: 5 mV/V
6
: 10 mV/V
7
: 20 mV/V
0
: Specify (strain gauge and excitation)
[2] OUTPUT
Current
A
: 4 – 20 mA DC (Load resistance 750 Ω max.)
B
: 2 – 10 mA DC (Load resistance 1500 Ω max.)
C
: 1 – 5 mA DC (Load resistance 3000 Ω max.)
D
: 0 – 20 mA DC (Load resistance 750 Ω max.)
E
: 0 – 16 mA DC (Load resistance 900 Ω max.)
F
: 0 – 10 mA DC (Load resistance 1500 Ω max.)
G
: 0 – 1 mA DC (Load resistance 15 kΩ max.)
Z
: Specify current (See OUTPUT SPECIFICATIONS)
Voltage
1
: 0 – 10 mV DC (Load resistance 10 kΩ min.)
2
: 0 – 100 mV DC (Load resistance 100 kΩ min.)
3
: 0 – 1 V DC (Load resistance 100 Ω min.)
4
: 0 – 10 V DC (Load resistance 1000 Ω min.)
5
: 0 – 5 V DC (Load resistance 500 Ω min.)
6
: 1 – 5 V DC (Load resistance 500 Ω min.)
4W
: -10 – +10 V DC (Load resistance 2000 Ω min.)
5W
: -5 – +5 V DC (Load resistance 1000 Ω min.)
0
: Specify voltage (See OUTPUT SPECIFICATIONS)
[3] POWER INPUT
AC Power
B
: 100 V AC
C
: 110 V AC
D
: 115 V AC
F
: 120 V AC
G
: 200 V AC
H
: 220 V AC
J
: 240 V AC
DC Power
R
: 24 V DC
[4] OPTIONS (multiple selections)
Input Signal Indicator
blank
: Without
/E
: With (0.0 - 100.0 % display)
Response Time (0 – 90 %)
blank
: Standard (≤ 0.5 sec.)
/K
: Fast Response (Approx. 25 msec.)
Other Options
blank
: none
/Q
: Option other than the above (specify the specification)
SPECIFICATIONS OF OPTION: Q (multiple selections)
COATING (For the detail, refer to our web site.)
/C01
: Silicone coating
/C02
: Polyurethane coating
/C03
: Rubber coating
TERMINAL SCREW MATERIAL
/S01
: Stainless steel
GENERAL SPECIFICATIONS
Construction
: Plug-in
Connection
: M3.5 screw terminals
Screw terminal
: Chromated steel (standard) or stainless steel
Housing material
: Flame-resistant resin (black)
Isolation
: Input or output to power
Overrange output
: Approx. -10 to +120 % at 1 – 5 V
Excitation adjustment
: 2 – 5 V (front) limited to ≤ 10 V when the remote sensing terminals are open.
Zero adjustments (tare)
: 0 – 80 % (front)
(Excitation voltage: factory default)
Span adjustment
: 100 – 20 % (front)
(Excitation voltage: factory default)
■ DISPLAY (Input indicator)
LCD digital display
: 0.0 - 100.0 % (min. digit 0.1 %)
(No scaling)
INPUT SPECIFICATIONS
Input
: Bridge voltage from load cells
Allowable leadwire resistance
: ≤ Total Strain Gauge Resistance × 0.25
•
Strain Gauge
Rated output from strain gauge
: 1 – 20 mV/V; Input to the transmitter must be over 3 mV.
•
Excitation
: 2 – 5 V adjustable (5 V standard)
Maximum current
: 65 mA
OUTPUT SPECIFICATIONS
■ DC Current
: 0 – 20 mA DC
Minimum span
: 1 mA
Offset
: Max. 1.5 times span
Load resistance
: Output drive 15 V max.
■
DC Voltage
: -10 – +12 V DC
Minimum span
: 5 mV
Offset
: Max. 1.5 times span
Load resistance
: Output drive 10 mA max.; 5 mA for negative voltage output; at ≥ 0.5 V
INSTALLATION
Power input
•
AC
: Operational voltage range: rating ±10 %,
50/60 ± 2 Hz, approx. 5 VA
•
DC
: Operational voltage range: 24 V ±10 %,
approx. 150 mA, ripple 10 %p-p max.
Operating temperature
: -5 to +60°C (23 to 140°F)
Operating humidity
: 30 to 90 %RH (non-condensing)
Mounting
: Surface or DIN rail
Weight
: 430 g (0.95 lb)
PERFORMANCE in percentage of span
Accuracy
: ±0.1 % (input ≥ 3 mV)
Display accuracy
: ± (0.1 % of FS + 1 digit)
(input ≥ 3 mV)
Temp. coefficient
: ±0.015 %/°C (±0.008 %/°F) (input ≥ 3 mV)
Line voltage effect
: ±0.1 % over voltage range
Insulation resistance
: ≥ 100 MΩ with 500 V DC
Dielectric strength
: 2000 V AC @1 minute for AC power
1000 V AC @1 minute for DC power
(input or output to power)
2000 V AC @1 minute
(input or output or power to ground)
EXTERNAL VIEW
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM