Description
METSO D201134
Technical Specifications: 8‑channel analog output; output signal 4‑20 mA; 16‑bit D/A conversion resolution; per‑channel over‑current protection; loop break detection function; power supply from rack backplane; rack plug‑in installation; operating temperature range 0 ℃‑+55 ℃; each channel LED status indicator; electrical isolation between field and system; protection class IP20.
Functional Features: Convert digital control value to 4‑20 mA analog output signal; per‑channel independent over‑current protection; output‑loop wire‑break detection; module hardware self‑diagnosis; single‑channel fault isolation; upload fault‑alarm information to DCS host monitoring system.
Application Scenarios: Thermal power plant boiler auxiliary regulating‑valve control cabinet; chemical reaction device continuous‑process regulating cabinet; pulp and paper mill pressure‑adjusting valve control cabinet; water‑treatment plant regulating‑actuator control cabinet.
Performance Parameters: Full‑scale output accuracy ±0.12 %; low long‑term zero drift; stable signal transmission for long‑distance wiring; comply with industrial EMC 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 baffle; circuit‑board covered with three‑proof conformal coating.
Structural Features: Rack plug‑in modular card‑type structure; front panel integrates LED indicators for power‑on, running and channel fault; rear gold‑plated edge connector connects to rack backplane bus; analog output circuit 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 D201134 module via 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 regulating equipment through 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 Damatic XD 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 in separate trunking. Guarantee reliable connection for cabinet protective‑grounding terminal. Reserve sufficient ventilation space for module heat dissipation.
Precautions for Use: Verify signal polarity strictly before wiring work. Cut off rack backplane power supply before plugging and 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. Avoid condensation phenomenon inside control cabinet.
