Digital guide
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Yokogawa F3LD21‑0N
- Product Name: Yokogawa F3LD21‑0N Digital Input Module
- Product Series: FA3 Series Programmable Logic Controller (PLC) I/O Module
- Technical Specifications: Input type: digital discrete input; rated input voltage: 24 VDC; input channel configuration: standardized channel layout matching FA3 PLC backplane; connection interface: terminal block‑based wiring
Detailed content
- Functional Features: Receives discrete digital signals from field sensors, switches, and contact devices; performs signal conditioning and isolation; transmits processed digital data to the FA3 PLC CPU unit; supports high‑speed signal acquisition and noise filtering
- Performance Parameters: Operating temperature range: 0 °C to +55 °C; storage temperature range: −20 °C to +70 °C; isolation withstand voltage: 500 VAC for 1 minute; protection class: IP20
- Material Composition: Main body: flame‑retardant engineering plastic; internal circuit board: FR‑4 high‑temperature‑resistant PCB; terminal connectors: copper alloy with nickel plating
- Structural Characteristics: DIN‑rail mountable compact modular structure; plug‑and‑play backplane connection; integrated status LED indicators for each input channel
- Working Principle: Converts field‑side discrete on/off electrical signals into standardized digital logic signals via optocoupler isolation, then transmits to the central processing unit for logic judgment and program execution
- Advantages & Highlights: High electrical isolation performance; anti‑interference circuit design; compact footprint; seamless compatibility with Yokogawa FA3 PLC system; long‑term stable operation under industrial electromagnetic interference environments
- Applicable Industries: Petrochemical, power generation, water treatment, manufacturing automation, food & beverage, pharmaceutical processing
- Installation Requirements: Mount on standard 35 mm DIN rail; install within well‑ventilated control cabinet; maintain clearance from heat‑generating components; wiring per Yokogawa official terminal assignment diagrams
- Usage Precautions: Avoid exposure to corrosive gases, excessive humidity, and direct vibration; strictly follow rated voltage limits; implement proper grounding for signal integrity
