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M3LM OPERATING MANUAL EM-2663-B Rev.4
12.1.4 INSTALLATION
Power consumption
DC power
R4: 10 – 32 V DC
Operational voltage range 9 – 36 V DC
Ripple 10% p-p max.
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 (3.53 oz)
12.1.5 PERFORMANCE
Accuracy
Input Ac Output Accuracy
Input accuracy: (% of input range) inversely proportional to the span
0 – 90 Ω : ±0.02 (%)
0 – 200 Ω : ±0.02
0 – 400 Ω : ±0.01
0 – 1000 Ω : ±0.01
0 – 20 kΩ : ±0.02
Output accuracy: ±0.04% of output range; inversely proportional to the span.
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)
12.1.6 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
12.1.7 CALCULATION EXAMPLES OF OVERALL ACCURACY
(1) Maximum input range 0 to 1000 Ω, input range 250 to 750 Ω (total resistance 1000 Ω), output range 1 to 5 V DC
Input accuracy = Maximum input span (1000 Ω) ÷ input span (500 Ω) × input accuracy (0.01%) = 0.02%
Output accuracy = Maximum output span (20 V) ÷ output span (4 V) × output accuracy (0.04%) = 0.2%
➠
Overall accuracy = ±0.22%
(2) Maximum input range 0 to 200 Ω, input range 27 to 108 Ω (total resistance 135 Ω), output range 4 to 20 mA DC
Input accuracy = Maximum input span (200 Ω) ÷ input span (81 Ω) × input accuracy (0.02%) = 0.05%
Output accuracy = Maximum output span (20 mA) ÷ output span (16 mA) × output accuracy (0.04%) = 0.05%
➠
Overall accuracy = ±0.1%
