ES-5466 Rev.4
M8LCS
Dual Output Super-mini Signal Conditioners Pico-M Series
STRAIN GAUGE CONVERTER
Functions & Features
• Provides two DC output signals proportional to a bridge type strain gauge utilized in load cells, pressure transducers
• Supplies required excitation voltage
• Drives strain gauges of various bridge resistance and rated output voltage
• Excitation selectable among 2.5 V, 5 V or 10 V
• Wide-range adjustment: 0 – 60 % for zero, 40 – 100 % for span
• Space-saving, easy-to-maintain, multi-channel installation base
MODEL: M8LCS-[1][2][3]-R
ORDERING INFORMATION
• Code number: M8LCS-[1][2][3]-R
Specify a code from below for each of [1] through [3].
(e.g. M8LCS-226A-R)
• Special input strain gauge range (For code 0)
• Special excitation range (For code 0)
[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 (See INPUT SPECIFICATIONS)
[2] EXCITATION
1
: 2.5 V
2
: 5 V
3
: 10 V
0
: Specify (See INPUT SPECIFICATIONS)
[3] OUTPUT 1 / OUTPUT 2
6A
: 1 – 5 V DC (Load resistance 2500 Ω min.)
/ 4 – 20 mA DC (Load resistance 300 Ω max.)
44
: 0 – 10 V DC (Load Resistance 5000 Ω min.)
/ 0 – 10 V DC (Load Resistance 5000 Ω min.)
55
: 0 – 5 V DC (Load resistance 2500 Ω min.)
/ 0 – 5 V DC (Load resistance 2500 Ω min.)
66
: 1 – 5 V DC (Load resistance 2500 Ω min.)
/ 1 – 5 V DC (Load resistance 2500 Ω min.)
POWER INPUT
DC Power
R
: 24 V DC
(Operational voltage range 24 V ±10 %, ripple 10 %p-p max.)
RELATED PRODUCTS
• Installation Base or Single Mount Base Socket (model: M8BSx)
This unit must be mounted on dedicated base or socket.
GENERAL SPECIFICATIONS
Construction
: Plug-in
Mounting screw
: M3 screw (torque 0.3 N·m)
Housing material
: Flame-resistant resin (black)
Power supply
: Via the Installation Base terminals
(model: M8BSx)
Isolation
: Input to output 1 to output 2 to power
Zero adjustment
: 0 – 60 % (front)
Span adjustment
: 100 – 40 % (front)
INPUT SPECIFICATIONS
■ Input
: Bridge voltage from load cells
Permissible leadwire resistance
: Strain Gauge Composite Resistance × 0.25
• Strain Gauge
Rated output from strain gauge
: 1 – 20 mV/V;
M8LCS input voltage -100 –+100 mV;
Input to the M8LCS must be over 5 mV.
(The input must be over 10 mV when Code 0 is selected for the strain gauge and/or the excitation.)
• Excitation
: 2 – 10 V
Maximum current
: 45 mA
INSTALLATION
Current consumption
: Approx. 60 mA (80 mA for current output)
Operating temperature
: 0 to 55°C (32 to 131°F)
Operating humidity
: 30 to 95 %RH (non-condensing)
Mounting
: Installation Base (model: M8BSx)
Weight
: 70 g (2.5 oz)
PERFORMANCE in percentage of span
Accuracy
: ±0.1 % (input ≥ 5 mV)
Temp. coefficient
: ±0.02 %/°C (±0.01 %/°F) (input ≥ 5 mV)
Response time
: ≤ 0.2 sec. (0 – 90 %)
Line voltage effect
: ±0.1 % over voltage range
Insulation resistance
: ≥ 100 MΩ with 500 V DC
Dielectric strength
:
1500 V AC @1 minute (input to output 1 or output 2 or power to ground)
500 V AC @1 minute (output 1 to output 2 to power)
SWC test
: ANSI/IEEE-C37.90.1-1989
FRONT VIEW
Span adjustment
(sensitivity adjustment)
40 – 100 % of input span
Zero adjustment
(tare adjustment)
0 – 60 % of input span
EXTERNAL DIMENSIONS unit: mm [inch]
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM