Description
METSO A413135
Technical Specifications: 4‑channel analog output; 4‑20 mA standard current signal output; 16‑bit D/A conversion resolution; backplane 24 VDC power supply; rack plug‑in installation; operating temperature range 0 ℃ to +55 ℃; each channel LED status indicator; electrical isolation between field circuit and system backplane; protection class IP20.
Functional Features: Convert digital control instruction into 4‑20 mA analog signal; per‑channel independent over‑current protection; output loop break detection; module hardware self‑diagnosis; single‑channel fault isolation; upload fault‑alarm information to DCS host monitoring system.
Application Scenarios: Regulating‑valve control cabinet of thermal‑power boiler auxiliary system; chemical reaction device continuous process regulating cabinet; pulp and paper mill pressure‑adjusting valve control cabinet; regulating‑actuator control cabinet of water‑treatment plant.
Performance Parameters: Output signal full‑scale accuracy ±0.12 %; low long‑term zero drift; stable signal transmission for long‑distance wiring; comply with industrial EMC electromagnetic compatibility standards; support 7×24 hours non‑stop continuous operation.
Material Composition: Fiberglass epoxy multilayer printed circuit board; high‑precision D/A conversion chip; optoelectronic isolation components; gold‑plated edge connector; metal front panel; three‑proof conformal coating on circuit board surface.
Structural Features: Rack plug‑in modular structure; front panel integrates LED indicators for power supply, running and channel fault; rear gold‑plated edge connector connects to DNA rack backplane bus; analog output loop and system logic circuit are physically separated; front panel fitted with mechanical anti‑loose locking buckle.
Working Principle: DPU controller sends digital adjustment command to A413135 module through backplane bus. Internal D/A chip converts digital numerical value into 4‑20 mA analog current signal. Analog signal passes protection circuit and transmits to field valve positioner via matched terminal base. Module monitors each output loop state continuously, identifies short‑circuit, open‑circuit and overload faults, lights corresponding fault indicator and uploads alarm information to upper DCS system.
Installation Requirements: Install module into designated slot of Metso DNA I/O rack and use together with original matched terminal base. Adopt twisted‑pair shielded cables for analog‑signal wiring. Cable shielding layer applies single‑point grounding. Signal cables and power cables are laid inside separate trunking. Guarantee reliable connection for cabinet protective grounding terminal. Reserve adequate ventilation clearance for module heat dissipation.
Precautions for Use: Verify signal polarity strictly before wiring work. Cut off backplane power supply before plugging or removing module. Wear anti‑static wrist strap when touching circuit‑board components. Never feed high‑voltage signal into analog‑output channel. Inspect wiring terminal tightness periodically. Keep cabinet internal humidity 20 %‑80 % without condensation.
