Foxboro N0309YK Isolated 2-Wire R/V Converter

Product Description

The Foxboro N0309YK is a precision 2-wire, isolated Resistance-to-Voltage (R/V) converter designed to translate 4–20 mA current-loop signals into 0–10 VDC voltage outputs. This module enables seamless integration between current-based field transmitters and voltage-based PLC or DCS input cards, providing accurate signal conditioning for process-control applications.

Engineered for industrial environments, the N0309YK is loop-powered, eliminating the need for an external power supply, and housed in a rugged NEMA 4X enclosure for protection against dust, moisture, and corrosive atmospheres. Its high accuracy (±0.25% of span) and linearity (±0.1%) ensure reliable performance in pressure, temperature, flow, and level measurement systems. DIN-rail or panel mounting options provide installation flexibility.

Key Features

• Converts 4–20 mA input signals to 0–10 VDC output

• 2-wire loop-powered design for simplified installation

• NEMA 4X enclosure for outdoor and corrosive environments

• High accuracy: ±0.25% of span, linearity ±0.1%

• Full electrical isolation between input and output

• Reverse polarity protection built-in

• Mounting options: DIN rail or panel

• CE, UL, and CSA certified

Technical Specifications

Input

• Signal Type: 4–20 mA current loop

• Field-Selectable Spans: 0–100 mV to 0–10 VDC

• Special-Order Spans: 0–5 V, 0–15 V, 0–30 V, 0–60 V, 0–120 V

Output

• Signal Type: 0–10 VDC

• Accuracy: ±0.25% of span

• Linearity: ±0.1%

Electrical & Protection

• Power Supply: Loop-powered (2-wire)

• Isolation: Full input-to-output isolation

• Reverse Polarity Protection: Yes

• Low power consumption

Environmental

• Operating Temperature: –40°C to +85°C

• Enclosure: NEMA 4X (dustproof, waterproof, corrosion-resistant)

• Suitable for: Outdoor, corrosive, and industrial environments

Mechanical

• Dimensions: 10 × 5 × 2 cm

• Weight: 0.5kg

• Mounting: DIN rail or panel

Applications

• Signal conversion for PLC and DCS systems

• Conditioning 4–20 mA loops for pressure, temperature, flow, and level measurement

• Industrial automation in harsh environments

• Upgrading legacy 4–20 mA systems to voltage-input devices

• Corrosive, outdoor, and high-reliability installations

FAQ

Q: Does the N0309YK require an external power source?
A: No, it is loop-powered and draws power directly from the 4–20 mA loop.

Q: What is the maximum output voltage?
A: The module converts to 0–10 VDC with high accuracy.

Q: Can it operate in outdoor or corrosive environments?
A: Yes, the NEMA 4X enclosure ensures protection against dust, moisture, and corrosive atmospheres.

Q: Are there alternative span configurations?
A: Yes, field-selectable spans and special-order voltage ranges up to 120 VDC are available.