DEIF VTR-5-PY Voltage Transducer – Reliable AC voltage-to-analog conversion for PLC/SCADA inputs

The DEIF VTR-5-PY is a compact voltage transducer designed to turn AC line voltage into a clean, isolated analog signal your PLC, DCS, or data logger can read. From my experience, it fits naturally in generator switchboards, MV/LV substations, and retrofit panels where you need a stable 4–20 mA or 0–10 V proportional signal without dragging the power system down. One thing I appreciate is the robust isolation between input, output, and auxiliary supply—noise and ground loops are rarely an issue when it’s wired correctly.

Typical use cases include: feeding voltage into PLC AI cards for load shedding logic, trending grid voltage in compact SCADA cabinets, or replacing older analog transducers with a modern, DIN-rail, true-RMS unit. A switchboard OEM told us they like it because the scaling stays steady across 50/60 Hz and slightly distorted waveforms, which seems to be the norm in mixed industrial plants.

Order Placement Process and Guarantees

• Warranty: 365 days
• Delivery time: 1 week for in-stock; no more than one month at the latest
• Payment: 50% advance payment; full payment before delivery
• Express options: FedEx, UPS, DHL

Key Features

• True RMS voltage measurement: Typically handles distorted waveforms without skewing the analog output.
• Analog output your PLC understands: Factory-configured DC output (commonly 4–20 mA or 0–10 V) for fast integration.
• Galvanic isolation: Input/output/auxiliary supply isolated to reduce noise, ground loops, and cross-fault risks.
• Universal auxiliary supply (PY): The PY variant is commonly a wide-range AC/DC supply, so mixed-control panels are simpler to power.
• DIN-rail form factor: Easy to drop into existing panels; wiring is straightforward with screw terminals.
• Stable scaling: In many cases you get repeatable accuracy across 50/60 Hz and typical industrial temperature ranges.

Technical Specifications

Note: Specific ranges and output types are factory-set per VTR-5-PY configuration. If you share your required scaling (e.g., 0–500 V to 4–20 mA), we’ll confirm the exact code before shipping.

Related or Supporting Products

• DEIF VTR series variants – Different ranges/outputs; useful if you need alternative scaling or output type.
• DEIF ATR – Current transducer (AC current to DC analog), pairs with separate CTs for current channels.
• DEIF QTR – Reactive power transducer; helpful for power factor correction monitoring.
• DEIF PTR – Active power transducer; for kW measurement where both V and I are required.
• DEIF MTR-4 – Multifunction transducer with multiple electrical parameters in one unit if you need more than voltage.

Installation & Maintenance

• Panel environment: Mount on DIN rail inside a metal cabinet with basic ventilation. Keep it away from contactors or VFDs if possible to avoid conducted noise.
• Wiring: Use properly rated conductors for the measured voltage; add inline fuses on voltage sensing leads. For the analog output, shielded twisted pair helps when routing past noisy equipment.
• Grounding & isolation: Honor the isolation barriers—do not bond input and output returns. You might notice cleaner signals if the shield is grounded at one end only.
• PLC scaling: Match PLC engineering units to the transducer’s factory scaling. A quick sanity check with a handheld meter during commissioning saves time.
• Routine maintenance: Annually re-tighten terminals, dust the unit, and verify output against a known reference. Firmware isn’t typically user-updatable on transducers, so calibration checks are the go-to.
• Safety: De-energize the circuit before changing connections. Use appropriate PPE when working near live conductors.

Quality & Certifications

• Compliance: CE and RoHS as standard for DEIF instrumentation; UL/cUL availability may depend on the exact variant.
• Quality system: Manufactured under ISO 9001 quality management.
• Warranty: 365-day replacement/repair coverage as stated above.