ES-2661 Rev.15
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 cable (model: MCN-CON or COP-US)
• PC configurator software (model: M3CFG)
Downloadable at our web site.
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