Product Brief
High-precision 8-channel analog input rack module optimized for low-noise laboratory and critical closed-loop process measurement, base standard temperature grade hardware without extended cold operating specifications.
Technical Specifications
- Backplane Supply Voltage: 24 V DC, 6.8 W power draw maximum
- Input Channel Quantity: 8 high-precision isolated analog input channels
- Supported Input Signals: 4–20 mA, 0–5 V, 0–10 V, Pt100, Pt1000, K/T/J thermocouples
- Static Measurement Accuracy: 0.07% Full Scale ultra-high precision rating
- Channel-to-Ground Isolation: 1000 Vrms galvanic isolation per channel
- CMRR Noise Rejection: 92 dB at 50/60 Hz industrial mains frequency
- Full Scan Response Time: 320 ms per eight-channel complete cycle
- Operating Temperature Range: -10 °C to +60 °C
- Physical Dimensions: 100 mm (H) × 50 mm (W) × 20 mm (D)
- Net Weight: 0.40 kg
- Certifications: CE, UL508A, ATEX Zone 2
Functional Features
- Per-channel 24-bit delta-sigma analog-to-digital conversion for ultra-fine measurement resolution
- Digital low-pass noise filtering software configurable per individual channel
- Precision integrated cold-junction compensation circuit for thermocouple inputs
- Overrange, underrange, and open-sensor wire fault detection with front-panel LED indicators
- On-board signal averaging algorithm for vibration-prone process measurement stabilization
Material Composition
- Enclosure: Black UL94-V0 ABS flame retardant plastic housing
- PCB Substrate: Low-noise four-layer FR4 fiberglass circuit board with differential signal routing
- Terminals: Gold-plated spring-clamp polyamide wiring terminals
- Internal Heat Sink: Extruded lightweight aluminum passive cooling block
Structural Characteristics
- Single-slot standard Metso PLC rack horizontal DIN rail mount form factor
- Front removable wiring terminal block for field sensor cable termination
- Rear dual-row pin header interlock with Metso standard DCS backplane bus
- Integrated vibration dampening mounting latches for high-shock industrial rack installations
Working Principle
Multi-type analog sensor signals enter independent isolated channel circuits with dedicated passive anti-aliasing noise filters. High-resolution 24-bit delta-sigma ADC chips convert continuous analog signals to high-bit-depth digital data streams. Local module microcontroller executes user-configurable digital averaging and filtering algorithms, packages calibrated digital measurement data, and transmits data packets over the rack backplane serial bus to the central PLC CPU for process monitoring and control logic execution.
Core Advantages
- 0.07% FS ultra-high measurement precision for laboratory-grade process monitoring
- 1000 Vrms full channel isolation eliminates cross-channel electrical interference
- Multi-filter digital signal processing stabilizes readings on vibration-heavy process equipment
- Universal signal compatibility supports all standard industrial temperature and flow sensors
- Plug-and-play rack hot-swappable hardware reducing system downtime during maintenance
Applicable Industries
Pharmaceutical batch manufacturing, specialty chemical laboratory process control, food & beverage precision blending, semiconductor wafer manufacturing, environmental emissions continuous monitoring systems, high-purity water treatment
Installation Mandatory Requirements
- Install only inside sealed, temperature-regulated electrical control cabinets
- All field sensor wiring must utilize shielded twisted pair cabling
- Shield cable grounding limited to cabinet terminal bar single-point connection
- Minimum 20 mm vertical airflow gap required above and below module for thermal stability
- Facility protective earth ground resistance must measure less than 4 Ω at rack mounting location
Operational Maintenance & Usage Restrictions
- Bi-annual full channel calibration required for pharmaceutical and emission monitoring deployments
- Ambient operating temperature must remain within -10 °C to +60 °C operating band
- Input terminal transient voltage limited to maximum 30 V DC surge protection threshold
- Do not route analog sensor wiring parallel to high-current motor power cables
- Long-term spare storage requires temperature-controlled dry cabinet environment (10–30 °C)
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