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YOKOGAWA F3LE12-0T
Product Category: Analog Voltage Input Module for Programmable Logic Controllers
Product Overview:
The F3LE12-0T is a 12-channel analog voltage input module designed for the Yokogawa F3 and F7 series PLC platforms. The “0T” suffix designates the 0–10 V DC input range with 12-bit resolution. This module digitizes low-level voltage signals from field sensors (pressure transmitters, level transmitters, flow meters, etc.) for PLC processing.
Detailed content
Technical Specifications:
| Parameter | Value |
|---|---|
| Number of Channels | 12 channels |
| Input Signal Type | 0–10 V DC (voltage input) |
| Input Resolution | 12-bit (4096 steps) |
| Input Impedance | ≥ 1 MΩ (typ.) |
| Conversion Time | 2 ms per channel (scan) |
| Accuracy | ±0.1% of full scale (±10 mV) |
| Common Mode Rejection Ratio (CMRR) | ≥ 80 dB |
| Isolation Voltage | 500 V AC (channel-to-channel, channel-to-backplane) |
| Operating Temperature | 0°C to +55°C |
| Power Supply | 5 V DC (from PLC backplane) |
| Power Consumption | ≤ 2.0 W (typ.) |
| Housing Material | Flame-retardant ABS resin |
| Mounting | DIN rail / PLC backplane insertion (F3/F7 series) |
| Compliance | CE, UL/cUL |
Functional Features:
- 12 independent voltage input channels with high input impedance (≥1 MΩ) — minimizes loading on field sensors
- 12-bit A/D conversion for precise signal digitization
- Galvanic isolation (500 V AC) between channels and backplane eliminates ground loop errors
- Wide common-mode voltage range — handles field grounding variations
- Built-in diagnostic LEDs per channel for signal presence detection
- Compatible with F3 and F7 PLC CPUs — unified programming environment
Working Principle:
The 0–10 V DC signal from each field sensor is fed directly into a high-impedance (≥1 MΩ) input buffer amplifier. The buffered signal is then sampled by a 12-bit A/D converter sequentially across all 12 channels. Digital values are transferred to the PLC CPU via the backplane bus. Channel isolation is maintained through magnetic or optical isolation barriers rated at 500 V AC.
Key Advantages:
- High input impedance (≥1 MΩ) — does not load field sensors, preserves signal accuracy
- 12 channels in one module — reduces wiring complexity and cabinet space
- Robust 500 V isolation — suitable for harsh industrial ground conditions
- F3/F7 platform compatibility — single programming environment for all modules
- Fast 2 ms scan time — supports real-time control applications
Applicable Industries:
- Process Control (chemical, petrochemical, refinery)
- Power Plant Auxiliary Systems
- HVAC Control
- Machine Building (OEM)
- Water/Wastewater Treatment
- Food Processing
Model Series:
- F3LE08 — 8-channel, 0–10 V
- F3LE12 — 12-channel, 0–10 V (this model: F3LE12-0T)
- F3LE12-1T — 12-channel, 1–5 V
- F3AD04 — 4-channel, 4–20 mA
Installation Requirements:
- Insert into F3/F7 PLC backplane with confirmed slot compatibility
- Use shielded cables for voltage signal wiring — connect shield to PLC ground at one end only
- Do not exceed 10 V DC input — overvoltage will damage the A/D input stage
- Ensure field sensor ground reference is compatible with PLC ground potential
- Keep voltage signal cables separated from power cables (>100 mm spacing)
Usage Precautions:
- Input range is strictly 0–10 V DC — do not apply negative voltages or voltages >10.5 V
- Maximum source impedance of field device: ≤ 500 Ω for accurate conversion
- Do not short-circuit input terminals — can damage the input buffer
- Do not apply AC signals — this is a DC-only input module
- Verify backplane 5 V DC supply is within ±5% tolerance before insertion
