KV-AD40G Keyence KV Series A/D Conversion Module In Stock

Overview

The KV-AD40G is a high-speed analog-to-digital expansion unit engineered for the Keyence KV Series PLC architecture. Featuring 4 differential analog input channels, the KV-AD40G delivers up to 1/60,000 resolution and a rapid conversion speed down to 50 µs per 2 channels using its hardware data buffering mechanism. Photocoupler isolation between CPU and channel groups protects control circuitry against harsh industrial electrical noise.

Technical Architecture & MECE Parameters

The operational specifications of the Keyence KV-AD40G module are classified below across core engineering vectors:

• Identity & System Integration
  • Brand: Keyence
  • Model: KV-AD40G
  • Series: Keyence KV Series PLC system
  • Unit Type: High-precision A/D conversion module
• Channel & Measurement Range
  • Analogue Input Points: 4 points (Differential inputs)
  • Voltage Input Ranges: -10 to +10 V (0.33 mV resolution, 1/60,000), 0 to 10 V (0.33 mV resolution, 1/30,000), 0 to 5 V (0.17 mV resolution, 1/30,000), 1 to 5 V (0.17 mV resolution, 1/24,000)
  • Current Input Ranges: 0 to 20 mA (0.67 µA resolution, 1/30,000), 4 to 20 mA (0.67 µA resolution, 1/24,000)
  • Input Impedance: Voltage mode: 5 MΩ; Current mode: 250 Ω
  • Absolute Maximum Inputs: Voltage: ±15 V; Current: 30 mA
• Sampling Speed & Conversion Precision
  • Standard Conversion Speed: 80 µs / 2 channels, 160 µs / 4 channels
  • High-Speed Buffer Speed: 50 µs / 2 channels, 100 µs / 4 channels
  • Conversion Precision (25 °C): Voltage: ±0.05% of F.S.; Current: ±0.05% of F.S.
  • Conversion Precision (0 to 50 °C): Voltage: ±0.1% of F.S.; Current: ±0.1% of F.S.
• Noise Isolation & Protection Circuitry
  • System Insulation: Photocoupler isolation between unit and CPU bus
  • Inter-Channel Isolation: Photocoupler isolation between CH_A (0, 1) and CH_B (0, 1)
  • Diagnostics: Hardware wire breaking detection for 1-5V and 4-20mA loops
• Data Buffering & External Trigger
  • Data Buffering Period: 50 µs to 3 s sampling interval
  • Buffer Memory Capacity: Maximum 10,000 words per channel
  • Synchronous Sampling: Hardware sync between CH_A0-CH_B0 and CH_A1-CH_B1
  • Trigger Input Signal: 1 point, NPN open collector / no-voltage contact (Min. ON voltage: 1 V, Max. OFF current: 0.1 mA)
• On-Board Signal Processing Functions
  • Math Filters: Scaling, specification count average, time-based average, moving average, primary delay filter
  • Data Calibration: Data offset adjustment, zero shift, zero clip, peak value lock, valley value lock, digital comparator
• Electrical & Physical Properties
  • Internal Current Draw: 220 mA or less
  • Unit Weight: Approximately 0.19 kg (190 g)

Target Equipment & Practical Applications

The high sampling speed and differential architecture make the Keyence KV-AD40G ideal for precision industrial equipment:

Diagnostic Capabilities & Commissioning Guidelines

• Hardware Wire-Break Detection: Configured for 4-20 mA or 1-5 V loops. Triggers a diagnostic flag when input drop below valid operational levels.
• Internal Data Buffering Logic: Stores up to 10,000 words per channel locally. Prevents CPU scan time delays from dropping high-speed analog points.
• Primary Delay Filtering: Filters out electrical ripple and mechanical vibration at the hardware module level prior to PLC logic evaluation.

Logistics, Warranty & Package Contents

• 12-Month Coverage Warranty: Every Keyence KV-AD40G includes a full 12-month quality guarantee.
• Rapid Express Shipping: Orders process within 24 to 48 hours with global express options via FedEx, UPS, or DHL.
• Package Checklist: Includes 1 x KV-AD40G analog unit and 1 x terminal block connector.

Global PLC Spare HUB's Insight

During a field retrofit on a high-speed metal extrusion line, hydraulic pressure transients were causing intermittent product defects. Standard PLC scan times of 5 ms missed 30 ms pressure spikes completely. Our engineering team deployed the Keyence KV-AD40G and enabled its 50 µs data buffering mode tied to a physical external trigger. The unit successfully captured high-speed pressure transients locally into its 10,000-word buffer. This allowed the client to adjust valve timing precisely without upgrading the primary CPU controller.

Selection Matrix & Field FAQ

• KV Series Analog Unit Selection Matrix:
  • Select KV-AD40G for ultra-high-precision 1/60,000 differential voltage/current inputs requiring data buffering and hardware channel isolation.
  • Select KV-AD40 for standard resolution multi-channel analog acquisition tasks without specialized synchronous hardware buffering.
  • Select KV-DA40 when converting digital PLC register values into analog control outputs for VFDs or servo drives.

Frequently Asked Questions

Q: How does the external trigger input optimize high-speed measurement on the KV-AD40G?

A: The NPN external trigger initiates data logging directly on hardware interrupt. It bypasses CPU scan delays to capture precise analog waveforms during high-speed events.

Q: What is the benefit of differential input wiring over single-ended analog inputs on this module?

A: Differential inputs measure the voltage difference between two signals rather than signal to ground. This cancels out common-mode electrical noise in industrial environments.

Q: Can CH_A and CH_B channels sample analog data at the exact same instant?

A: Yes. Hardware synchronization maintains tight data alignment between CH_A0-CH_B0 and CH_A1-CH_B1 during high-speed sampling modes.

Q: How do I eliminate signal fluctuation caused by machine vibration without slowing down PLC logic?

A: Enable the moving average or primary delay filter functions built into the module. The hardware cleans up raw signal noise before updating output registers.

Q: What cable precaution should be taken when installing current loops on the Keyence KV-AD40G?

A: Always use twisted-pair shielded cabling grounded at a single point. Ensure current inputs stay strictly below the 30 mA maximum limit to prevent internal shunt damage.

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