Description
METSO A413345
Technical Specifications: 8-channel RTD input; support PT100 and PT1000 thermal resistance; support 2-wire, 3-wire and 4-wire connection modes; 16-bit ADC conversion; channel photoelectric isolation; backplane 24VDC power supply; rack plug-in installation; operating temperature range 0℃ to +55℃; each channel LED status indicator; protection class IP20.
Functional Features: Directly collect thermal resistance temperature signal; software configurable for different wiring modes; hardware detection for sensor wire break; independent electrical isolation for each channel; single-channel fault isolation; module self-diagnosis function; upload temperature data and fault alarm to DCS system.
Application Scenarios: Bearing and pipeline temperature monitoring cabinet in thermal power plant; reaction vessel temperature collection cabinet in chemical plant; pulp cooking section temperature monitoring cabinet in paper mill; equipment temperature monitoring cabinet in water treatment plant.
Performance Parameters: Temperature measurement accuracy ±0.1℃; low long-term temperature drift; high conversion resolution; meet industrial EMC electromagnetic compatibility standards; support 7×24 hours uninterrupted continuous operation.
Material Composition: Glass fiber epoxy multilayer PCB circuit board; high-precision ADC chip; photoelectric isolation components; gold-plated edge connector; metal front panel; circuit board coated with three-proof protective coating.
Structural Features: Rack plug-in modular structure; front panel equipped with LED indicators for power, running and channel fault status; rear gold-plated edge connector connects to DCS rack backplane bus; analog acquisition circuit and logic circuit are physically separated; panel fitted with mechanical locking buckle.
Working Principle: Field RTD sensor signal is transmitted to A413345 module through supporting terminal base. The module outputs constant excitation current to thermal resistance. It collects resistance change value and converts resistance signal into digital temperature value through internal ADC chip. Temperature data is uploaded to DCS controller via backplane bus. The module detects wire break or short circuit fault of sensor and uploads alarm message.
Installation Requirements: Install in designated slot of Metso DNA I/O rack and match with original terminal base. Use special shielded compensation cable for RTD wiring. The shield layer adopts single-point grounding. Temperature signal cables and high-power cables are laid separately. Cabinet protective grounding terminal must be connected reliably.
Precautions for Use: Select corresponding wiring mode according to field RTD type. Cut off sensor loop power before wiring work. Do not access high voltage signal to input channel. Cut off rack backplane power before module disassembly. Check terminal tightness regularly. Avoid condensation inside cabinet.
