MODEL: M3LR

M3LR SPECIFICATIONS

ES-2662 Rev.13 Page 2/4

http://www.m-system.co.jp/

• I/O type, number of wires and range

• Zero and span adjustments

• Burnout action

• User’s RTD table setting

(max. 300 points, input resistance specified

within 0 – 30 kΩ)

(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

■ RTD: See Table 1.

Number of wires: 2, 3 or 4 wires

Excitation: ≤ 1.0 mA

Allowable leadwire resistance: 20 Ω per wire

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.

Temp. coefficient: ±0.015 %/°C (±0.008 %/°F) of max.

range 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

■ CALCULATION EXAMPLES OF OVERALL ACCURACY IN %

1) Pt 100, 0 – 500°C, 4 – 20 mA DC output

Absolute value accuracy (Table 1): 0.15°C

0.15°C ÷ 500°C × 100 = 0.03 % < 0.1%

Output span 16 mA (20 – 4) ≥ 2 mA (max. span 20 mA ×

0.1) ➠ No adding 0.2 %

➠ Overall accuracy = ±0.1 % of span

2) Pt 100, 0 – 100°C, 2.0 – 2.5 V DC output

Absolute value accuracy (Table 1): 0.15°C

0.15°C ÷ 100°C × 100 = 0.15 % > 0.1 %

Output span 0.5 V (2.5 – 2.0) ≤ 0.5 (max. span 5 V × 0.1) ➠

Add 0.2 %

➠ Overall accuracy = 0.15 + 0.2 = ±0.35 % of span

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)