ES-2661 Rev.14
M3LT
Space-saving Signal Conditioners M3-UNIT Series
THERMOCOUPLE TRANSMITTER
(field- and PC-configurable)
Functions & Features
• Accepts a thermocouple input and provides an isolated, linearized DC signal
• Easy ‘One-Step Cal’ calibration using the front three control buttons without needing a PC; PC software is also usable.
• Both input and output type and range are configurable
• Front control button function can be locked
• Cold junction compensation
• Linearization and burnout
MODEL: M3LT–R4/[1][2]
ORDERING INFORMATION
• Code number: M3LT-R4/[1][2]
Specify a code from below for each of [1] and [2].
(e.g. M3LT-R4/A/UL/Q)
• Specify the specification for option code /Q
(e.g. /C01)
• Orders will be shipped at default factory settings (K, 0 – 1000°C input/4 – 20 mA output)
INPUT – Field-selectable
Thermocouple
(PR), K (CA), E (CRC), J (IC), T (CC), B (RH), R, S, C (WRe 5-26),
N, U, L, P (Platinel II)
OUTPUT – Field-selectable
Current
0 – 20 mA DC
Voltage
-2.5 – +2.5 V DC
-10 – +10 V DC
POWER INPUT
DC Power
R4:
10 – 32 V DC
(Operational voltage range 9 - 36 V, ripple 10 %p-p max.)
[1] CONFIGURATION OPTIONS
A
: PC and field configurable
B
: Field configurable
[2] OPTIONS (multiple selections)
Standards & Approvals
blank
: CE marking
/UL
: UL approval, CE marking
Other Options
blank
: none
/Q
: Option other than the above (specify the specification)
SPECIFICATIONS OF OPTION: Q
COATING (For the detail, refer to our web site.)
/C01
: Silicone coating
/C02
: Polyurethane coating
/C03
: Rubber coating (UL not available)
RELATED PRODUCTS
• PC configurator software (model: M3CFG)
Downloadable at our web site.
A dedicated cable is required to connect the module to the PC. Please refer to the internet software download site or the users manual for the PC configurator for applicable cable types.
GENERAL SPECIFICATIONS
Construction
: Small-sized front terminal structure
Connection
: Euro type connector terminal
(applicable wire size: 0.2 to 2.5 mm
2
, stripped length 8 mm)
Housing material
: Flame-resistant resin (gray)
Isolation
: Input to output to power
Overrange output
: -15 to +115 %
Zero adjustment
: -15 to +15 % (front)
Span adjustment
: 85 to 115 % (front)
Burnout
: Upscale (default), downscale or no burnout selectable
Linearization
: Standard
Cold junction compensation
: CJC sensor attached to the
input terminals
Status indicator LED
: Tri-color (green/amber/red) LED; Blinking patterns indicate operation status of the transmitter.
Configuration
:
PC Configurator
: (Model: M3LTCFG) via Windows PC connected to th front jack.
Programmable features include
:
• I/O type and range
• Zero and span adjustments
• Burnout action
• User’s T/C table setting
(max. 300 points, input emf specified within
-100 – +1000 mV)
• Others
(Refer to the instruction manual)
‘One-Step Cal’ calibration
: With I/O type and the full-scale range configured via the internal DIP switches, precise 0 % and 100 % ranges are calibrated via the front control buttons with a help of LED. Also I/O calibration and fine adjustment are available with a PC.
Configurator connection
: 2.5 dia. miniature jack;
RS-232-C level
INPUT SPECIFICATIONS
■
Thermocouple
:
See table 1
Input resistance
: ≥ 1 MΩ
Burnout sensing
: 130 nA ± 10 %
Temperature range
: See Table 1.
OUTPUT SPECIFICATIONS
■ DC Current
Maximum range
: 0 – 20 mA DC
Minimum span
: 1 mA
Conformance range
: 0 – 24 mA DC
(Negative overrange current below 0 mA is not available.)
Offset
: Lower range can be any specific value within the output range provided that the minimum span is maintained.
Load resistance
: Output drive 12 V maximum
■
DC Voltage
Narrow Spans
Maximum range
: -2.5 – +2.5 V DC
Minimum span
: 250 mV
Conformance range
: -3 – +3 V DC
Wide Spans
Maximum range
: -10 – +10 V DC
Minimum span
: 1 V
Conformance range
: -11.5 – +11.5 V DC
Offset
: Lower range can be any specific value within the output range provided that the minimum span is maintained.
Load resistance
: Output drive 1 mA maximum
INSTALLATION
Power consumption
•
DC
: Approx. 3 W
Operating temperature
: -25 to +65°C (-13 to +149°F)
Max. 55°C (131°F) for UL approval
Operating humidity
: 0 to 95 %RH (non-condensing)
Mounting
: DIN rail
Weight
: 100 g (0.22 lb)
PERFORMANCE
Accuracy
: See Table 1 and refer to calculation examples of overall accuracy.
Cold junction compensation error
:
±0.5°C at 25 ±10°C
±0.9°F at 77 ±18°F
Temp. coefficient
: ±0.015 %/°C (±0.008 %/°F) of max. span at -5 to +55°C [23 to 131°F]
Response time
: ≤ 0.9 sec. (0 – 90 %)
Burnout response
: ≤ 10 sec.
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 or power to ground)
500 V AC @ 1 minute (output to power)
CALCULATION EXAMPLES OF OVERALL ACCURACY
[Example 1]
Input: K thermocouple, 0 – 1000°C, Output: 4 – 20 mA DC
1) Absolute value accuracy (Table 1): 0.25°C
2) CJC error (0.5°C) added: 0.75°C
3) 0.75°C ÷ 1000°C × 100 = 0.075 %
4) 0.075 % < 0.1 % of span. ➠ 0.1 % is selected.
5) Output span 16 mA (= 20 mA – 4 mA)
Max. span 20 mA
Output span ≥ 1/10 of max. span ➠ No need of adding
0.2 %.
6) Overall accuracy equals ±0.1 % of span
[Example 2]
Input: K thermocouple, 50 – 150°C, Output: 2.0 – 2.5 V DC
1) Absolute value accuracy (Table 1): 0.25°C
2) CJC error (0.5°C) added: 0.75°C
3) 0.75°C ÷ (150 – 50)°C × 100 = 0.75 %
4) 0.75 %> 0.1 % of span. ➠ 0.75 % is selected.
5) Output span 0.5 V (= 2.5 V – 2.0 V)
Max. span 5 V
Output span ≤ 1/10 of max. span ➠ Add 0.2 %.
6) Overall accuracy equals ±0.95 % of span (0.75 + 0.2)
STANDARDS & APPROVALS
EU conformity
:
EMC Directive
EMI EN 61000-6-4
EMS EN 61000-6-2
RoHS Directive
Approval
:
UL/C-UL general safety requirements
(UL 61010-1, CAN/CSA-C22.2 No.1010-1)
EXTERNAL VIEW
The DIP switch setting is required to select output types before setting a precise output range using the PC configurator software.
For detailed information on the configuration and calibration, refer to the instruction manual.
INPUT TYPE, RANGE & ACCURACY
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM