Specifications
Parameter Specification
Model Yokogawa MLX-A21-12
Input Type Analog input (voltage/current)
Input Channels 12 channels
Input Range Voltage: ±10 mV to ±10 V
Current: ±20 mA
Accuracy ±0.1% of reading ±1 μV
Sampling Speed Up to 100 ms per channel
Resolution 24-bit ADC
Common Mode Rejection >120 dB (DC to 60 Hz)
Normal Mode Rejection >60 dB (50/60 Hz)
Input Impedance >10 MΩ (voltage input)
Maximum Input Voltage ±30 V (channel-to-channel)
Isolation Channel-to-channel: 300 V AC
Channel-to-ground: 300 V AC
Operating Temperature 0°C to +50°C
Storage Temperature -20°C to +70°C
Power Supply 24 V DC ±10%
Power Consumption Approx. 5 W
Communication Interface Ethernet (10BASE-T/100BASE-TX)
Protocol Support Modbus/TCP, Yokogawa proprietary
Dimensions 100 × 100 × 125 mm
Weight Approx. 500 g
Key Features
High accuracy: ±0.1% reading accuracy

24-bit resolution for precise measurements

12 isolated input channels

Flexible input ranges (voltage/current)

Ethernet communication capability

Compact modular design

Easy integration with existing systems

Input Specifications
Voltage ranges: ±10 mV, ±20 mV, ±50 mV, ±100 mV, ±200 mV, ±500 mV, ±1 V, ±2 V, ±5 V, ±10 V

Current ranges: ±20 mA

Input impedance: >10 MΩ (voltage), 250 Ω (current)

Maximum input: ±30 V (voltage), ±30 mA (current)

Measurement Performance
Accuracy: ±0.1% of reading ±1 μV

Temperature coefficient: ±5 ppm/°C

Long-term stability: ±10 ppm/year

Noise rejection: Excellent CMRR and NMRR

Environmental Conditions
Operating temperature: 0°C to +50°C

Storage temperature: -20°C to +70°C

Relative humidity: 5% to 95% RH (non-condensing)

Altitude: Up to 2000 m

Electrical Specifications
Power supply: 24 V DC ±10%

Power consumption: 5 W typical

Isolation: 300 V AC channel-to-channel and channel-to-ground

Communication: Ethernet 10/100BASE-TX

Communication Features
Protocols: Modbus/TCP, Yokogawa proprietary

Data update rate: Configurable from 100 ms to 60 s

Simultaneous connections: Multiple client support

Configuration: Web interface and dedicated software

Mechanical Specifications
Housing: Metal enclosure

Mounting: DIN rail mount (35 mm)

Connections: Screw terminal block

Indicators: Status LEDs (power, communication, error)

Typical Applications
Process parameter monitoring

Environmental data logging

Energy consumption monitoring

Equipment condition monitoring

Laboratory data acquisition

Building automation systems

Research and development