ES-2664 Rev.16

M3LDY

Space-saving Signal Conditioners M3-UNIT Series

CURRENT LOOP SUPPLY

(linearizing; field- and PC-configurable)
Functions & Features
• Powers a 4 – 20 mA DC current loop
• Shortcircuit protection
• Applicable to smart transmitters
• PC-programmable linearization data (100 points and square root extraction)
• Easy ‘One-Step Cal’ calibration using the front three control buttons without needing a PC
• Front control button function can be locked
• Loop testing via the PC configuration software
Typical Applications
• Various 2-wire transmitters
• Linearizing weir flowmeter output to provide a linear-to-volume signal
• Isolator application (0 – 20 mA input)
• Square root extraction for differential pressure transmitter
• Ideal for use as a fast solution, multifunctional spare part
 

MODEL: M3LDY–R/[1][2]

ORDERING INFORMATION

• Code number: M3LDY-R/[1][2]
Specify a code from below for each of [1] and [2].
  (e.g. M3LDY-R/A/UL/Q)
• Specify the specification for option code /Q
  (e.g. /C01)
Orders will be shipped with default factory settings (4 – 20 mA input / 4 – 20 mA output).

INPUT

Current
0 – 20mA DC (Input resistance 274.9 Ω)

OUTPUT – Field-selectable

Current
0 – 20 mA DC
Voltage
-2.5 – +2.5 V DC
-10 – +10 V DC

POWER INPUT

DC Power
R: 24 V DC
(Operational voltage range 24 V ±10 %, 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 mm2, 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)
Status indicator LED: Tri-color (green/amber/red) LED; Blinking patterns indicate operation status of the transmitter.
Configuration
PC configurator: (Model: M3LDYCFG) via Windows PC connected to th front jack.
Programmable features include:
• Input range
• Output type and range
• Zero and span adjustments
• Linearization
• Loop test output
(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

SUPPLY OUTPUT

■ SUPPLY OUTPUT (across the terminals 1 – 2)
Output voltage: 24 – 28 V DC with no load
19 V DC minimum at 20 mA
Current rating: ≤ 22 mA DC
Permissible load resistance:
LR (Ω) ≤ (19 – Min. Operational Voltage)V ÷ 0.02 A
• Shortcircuit Protection
Current limited: 35 mA max.
Protected time duration: No limit

INPUT SPECIFICATIONS

■ DC Current:
Input resistor: Resistor incorporated
 (24.9Ω for isolator use)
Maximum range: 0 – 20 mA DC
Minimum span: 2 mA
Offset: Lower range can be any specific value within the input range provided that the minimum span is maintained.

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

LINEARIZATION (/A only)

Type selection and data programming: PC Configurator Software
• No Linearization: The output is proportional to the input.
• Segment Data: 100 points max. within the range of -15.00 to +115.00 % input or output represented as percentage of full-scale
Low-end cutout: Low-end cutout point selectable within the range of 0 to 100 %. For the input lower than the low-end cutout point, the output signal equals 0 %.
• Square Root Extraction
Low-end cutout: Low-end cutout point selectable within the range of 0 to 100 %. For the input lower than the low-end cutout point, the output signal is linear to the input.

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: Input Accuracy + Output Accuracy
  Input accuracy: ±0.06 % of input range
  Output accuracy: ±0.04 % of output range
(Input and output accuracy is inversely proportional to the span)
Temp. coefficient: ±0.015 %/°C (±0.008 %/°F) of max. span
Response time: ≤ 1 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 or power to ground)
500 V AC @ 1 minute (output to power)

CALCULATION EXAMPLES OF OVERALL ACCURACY

[Example] Input 4 – 20 mA, Output 4 – 20 mA
Input accuracy = Range 20 mA ÷ Span 16 mA × 0.06 % = 0.075 %
Output accuracy = Range 20 mA ÷ Span 16mA
× 0.04 % = 0.05 %
Overall accuracy = 0.075 + 0.05 = 0.13 %
(Segment gain < 1. Multiply the calculated result by the gain when exceeding 1.

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

For M3LDY-R/A, the DIP switch setting is required to select output and input 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.

EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM