Description
The ifm VKV021 and related VTV121 / VTV122 / VKV022 are vibration monitors / vibration transmitters designed for condition-based monitoring (CBM) of rotating machinery (motors, pumps, fans, gearboxes). They accept input from an IEPE / ICP® piezoelectric accelerometer (typically ifm’s VSA series), process the vibration signal, and provide:
- VKV021 / VKV022 → Switch output version — 2 independently adjustable switching points (Warning / Danger) with intuitive potentiometer or keypad setting; 2 × PNP/NPN switch outputs + 1 analog 4–20 mA (proportional to vibration velocity/acceleration RMS).
- VTV121 / VTV122 → Transmitter version — primary 4–20 mA analog output representing RMS vibration (velocity mm/s or acceleration g), optional second output or alarm contact.
Both families measure overall vibration RMS (usually filtered 10 Hz – 1 kHz band for velocity evaluation per ISO 10816) and can detect bearing damage trends when used with high-frequency acceleration evaluation (on select firmware/config). They feature a bright LED bar graph / numeric display (on VKV021 display versions) for local indication and simple setup without a PC.
Key Features
- Sensor Input: IEPE / ICP® accelerometer (18–30 V excitation, 2–20 mA constant current source — compatible with ifm VSA0xx / VSA1xx series accelerometers).
- Measurand: RMS Vibration Velocity (mm/s) — ISO 10816typical; or Acceleration (g) — selectable on some models.
- Outputs:
- VKV021: 2 × Switch (PNP/NPN) + 1 × Analog 4–20 mA
- VTV121: 1 × Analog 4–20 mA + optional alarm relay
- Display: Dual-line LCD + bar graph (VKV021 with display; VTV122 may have LED only — check suffix).
- Setup: 3 front keys — no PC required; switch points set via “teach” or direct potentiometer.
- Mounting: 35 mm DIN rail (EN 60715).
- Country of Origin: Germany
Model Reference Table
Model | Type | Display | Switch Outputs | Analog Output | Typical Use |
|---|---|---|---|---|---|
VKV021 | Monitor + Switch | ✅ LCD + Bar Graph | 2 × PNP/NPN (Warn + Danger) | 4–20 mA (0–Full Scale) | Local setup + alarm relays for shutdown/interlock |
VKV022 | Monitor + Switch (var.) | LED only / simplified | 2 × PNP/NPN | 4–20 mA | Cost-optimized, no numeric display |
VTV121 | Transmitter | LED Ind. | Optional Alarm Relay (some vars.) | 4–20 mA primary | Send vib. value to PLC/SCADA for trending |
VTV122 | Transmitter (var.) | LED Ind. | Alarm Relay (var.) | 4–20 mA | With alarm contact for basic protection |
💡 ISO 10816 Guidance:
Technical Specifications (Representative — VKV021 Vibration Monitor with Display)
Parameter | Specification |
|---|---|
Model / Order Code | VKV021 (ifm Electronic Vibration Monitor) |
Sensor Input | IEPE / ICP® accelerometer — excites 18–30 V, 2–20 mA constant current |
Measured Value | RMS Vibration Velocity (mm/s) — bandpass 10 Hz … 1 kHz (ISO 10816) or Acceleration (g) — model/fw dependent |
Measurement Range | Typically 0 … 25 mm/s RMS (velocity) — scalable via DIP/menu |
Switching Outputs | 2 × PNP (or NPN — model dependent) — Warning (pre-alarm) & Danger (main alarm) |
Analog Output | 4–20 mA (linear to selected full scale — e.g., 4 mA=0 mm/s, 20 mA=25 mm/s) |
Hysteresis / Delay | Adjustable response delay (0.1–10 s) to avoid nuisance tripping |
Display | Dual-line LCD — shows RMS value + switch status; bar graph for trend |
Power Supply | 18–30 V DC (typical 24 V DC loop / supply) |
Electrical Connection | M12 × 8-pin (A-coded) or terminal — check suffix |
Mounting | 35 mm DIN rail (EN 60715) |
Dimensions (W×H×D) | 22.5 mm × 99 mm × 114 mm (typical DIN rail housing) |
Weight | ~ 0.15 kg |
Standards | CE, UL (component), RoHS, conforms to ISO 10816 eval. practice |
Warranty & After-Sales
- Factory new units: 12 months warranty
- Refurbished units: 3-6 months warranty
- Technical support for:
- Accelerometer selection (VSA0xx — stud mount / adhesive mount, cable length)
- Mounting location guidance (bearing housing, orthogonal planes)
- Teach-function setup & baseline recording (healthy vs degraded)
- Alarm threshold recommendation per ISO 10816 machine class
- Wiring (sensor +Exc/-Sig to M12 pin; switch outputs to PLC DI or safety chain)
- Cross-reference vs. Hansford HS-420 / Wilcoxon 790 / ifm VSA+VM combo kits
Delivery Time
- Standard delivery: 3-5 working days (stock items)
- Express shipping available upon request
Why Choose Our Store
- Genuine ifm Electronic condition monitoring products
- Global supply network with competitive pricing
- Expertise in machine condition monitoring & vibration switch setup (ISO 10816)
- Comprehensive technical documentation (VSA accelerometer mounting drawing, VKV teach-in procedure, alarm table)
- Responsive customer service and support
Applications
- Pump / Motor Monitoring: Detect cavitation, unbalance, misalignment, bearing wear.
- Fan / Blower Overspeed / Imbalance Alert: Early warning before catastrophic failure.
- Gearbox Condition Monitoring: Trend RMS velocity; use high-freq accel mode (where avail.) for early bearing fault.
- Conveyor Drive Health: Integrate alarm into safety chain to trip on excessive vib.
- Retrofit of older machines: Add CBM without full CMS — simple switch + 4–20 mA to existing PLC.
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