XYCOM XVME-500/4 Product Description

I. Product Overview

XVME-500/4 is a 3U single-height VMEbus 12-bit high-speed analog input module launched by XYCOM (now under Pro-face). It is a high-performance version of the XVME-500 series, with the core positioning as a high-speed, high-precision, and scalable industrial-grade data acquisition card. It is equipped with a 12-bit high-speed A/D converter, providing 16 single-ended / 8 differential analog inputs, supports programmable gain and multiple voltage ranges, and is suitable for high-precision signal acquisition scenarios in industrial automation, process control, testing and measurement, military, and outdated VME systems. This module has been officially discontinued, and the market circulation is mainly in the form of second-hand, refurbished, and inventory spare parts. 

Core Positioning

As a VMEbus standard slave device, XVME-500/4 focuses on "3U compact size + 12-bit high precision + high-speed sampling + multi-channel flexible configuration + programmable gain + wide range + industrial-grade reliability + expandable", with a single-slot integrated high-density analog acquisition capability. It supports flexible switching between single-ended/differential inputs, through resistance configuration to adapt to weak to strong signals, with high-speed conversion to meet real-time acquisition requirements, addressing the core pain points of centralized acquisition of various types, wide ranges, and high-precision analog signals in industrial sites.

II. Core Functional Characteristics

1. Standard VMEbus interface (fully compatible slave device)

Fully complies with IEEE 1014 VMEbus specification, compatible with all 3U VME chassis and backplanes, operates in standard slave device mode, supports A16/A24 address space, base address configured by jumper, fixed at 1KB address boundary to avoid system address conflicts. Data width compatible with D08/D16, compatible with 8/16-bit VME master controllers, backplane connection uses P1 connector, supports VME standard interrupts (I1-I7) and system fault signals (SYSFAIL), plug-and-play.

2. 16 single-ended / 8 differential analog input (core function)

Equipped with 2 8-channel multiplexers, providing 16 single-ended (SE) or 8 differential (DI) analog input channels, configurable flexibly via software/hardware, independent acquisition between channels, no interference, capable of connecting sensors, transmitters, thermocouples, strain gauges, voltage/current sources and other types of analog signal sources.

Resolution: 12-bit A/D converter, accuracy ±0.5 LSB, linearity ±0.5 LSB, ensuring high-precision signal acquisition XYCOM.

Voltage range: supports single polarity (0–5V, 0–10V) and bipolar (±5V, ±10V) input, covering industrial standard signal range XYCOM.

Programmable gain: through onboard resistors, gain range 1–1000 times, suitable for millivolt-level weak signals to volt-level strong signals, no need for additional signal conditioning module XYCOM.

Input impedance: minimum 10MΩ, high impedance design reduces load impact on signal sources, ensuring signal integrity XYCOM.

Common mode rejection ratio: minimum 60dB, effectively suppressing common mode interference, suitable for industrial sites with strong electrical interference XYCOM.

Channel expansion: can be expanded to 32 single-ended / 16 differential channels through XVME-910 expansion kit, meeting large-scale acquisition requirements XYCOM.

3. High-speed sampling and conversion performance

Conversion time: single-channel conversion time ≤ 10μs, throughput up to 100kHz, meeting high-speed dynamic signal acquisition requirements.

Sampling mode: supports random channel sampling, sequential channel sampling, single-channel sampling and external trigger sampling, suitable for different acquisition scenarios.

Data cache: built-in data buffer, supports batch acquisition and transmission, reducing CPU load.

4. Flexible interrupts and data acquisition control

Supports multiple event interrupts, including conversion completion, data ready, over-limit alarm, etc., can shield any channel interrupt, interrupt vector configurable, suitable for high real-time acquisition scenarios. Supports query-style or interrupt-style data reading, meeting different system architecture requirements.

5. Industrial-grade high reliability design

Standard operating temperature 0℃～+65℃, compatible with industrial sites, test equipment, etc., harsh environments; The circuit board adopts multi-layer board wiring and gold-plated gold fingers design. The key circuits have noise suppression added, and it has strong anti-static and anti-interference capabilities, ensuring stable operation over a long period. The front cover is equipped with status indicator lights, facilitating quick troubleshooting of module operation and data collection status on-site.

III. Hardware Specifications Details

Bus Interface Specifications

Bus Protocol: IEEE 1014 VMEbus, standard slave device mode;

Address Space: A16/A24, jumper configuration for 1KB boundary base address;

Data Width: D08/D16;

Interrupt Support: VME standard interrupt I1-I7, configurable vector;

Backplane Interface: P1 connector;

Size: 3U (100mm×160mm), single slot;

Weight: Approximately 0.5kg.

Analog Input Specifications

Channel Quantity: 16 single-ended / 8 differential (expandable to 32SE/16DI);

Converter: 12-bit high-speed A/D;

Conversion Time: ≤10μs / channel;

Throughput: Maximum 100kHz;

Voltage Range: 0–5V, 0–10V, ±5V, ±10V;

Gain Range: 1–1000 times (resistor configuration);

Input Impedance: ≥10MΩ;

Common Mode Suppression Ratio: ≥60dB;

Precision: ±0.5 LSB (linearity, differential linearity) XYCOM.

Electrical and Environmental Specifications

Power Supply: +5V DC (VME bus power supply), typical power consumption approximately 1.6AXYCOM;

Operating Temperature: 0℃～+65℃;

Storage Temperature: –40℃～+85℃;

Humidity: 5%–95% RH (non-condensing);

Anti-Vibration: Complies with industrial standards, suitable for equipment vibration environments.

IV. Typical Application Scenarios

1. High-precision signal acquisition for industrial process control

Suitable for process control scenarios in industries such as chemical engineering, energy, and water treatment, for collecting analog signals such as temperature, pressure, flow, and level, with 12-bit accuracy + programmable gain to adapt to the output of various sensors, differential input for strong anti-interference in interference-prone environments to ensure stable data.

2. Data acquisition for testing and measurement instruments

Used for industrial testing equipment and data acquisition systems, connecting oscilloscopes, signal generators, sensor arrays, etc., with high-speed sampling (10μs conversion) to meet the requirements of dynamic signal acquisition, multi-channel simultaneous acquisition to enhance testing efficiency.

3. High-precision acquisition for outdated VME systems

Directly replace the low-resolution, low-speed acquisition modules in outdated systems, without modifying the chassis structure, expand to 16 high-precision analog inputs, support wide range and programmable gain, suitable for maintenance of outdated VME equipment in military, aerospace, and other fields, extending equipment lifespan.

4. Mechanical condition monitoring and fault diagnosis

Used for condition monitoring of wind turbines, machine tools, rail transit, etc., for collecting dynamic signals such as vibration, displacement, and speed, high-speed sampling + high-resolution to accurately capture signal characteristics, differential input to suppress on-site electromagnetic interference, ensuring reliable diagnostic data.

5. Large-scale distributed data acquisition

Through the XVME-910 expansion kit, expand to 32 single-ended / 16 differential inputs, suitable for centralized signal collection from multiple nodes in factory workshops, single module to achieve large-scale data acquisition, simplify system architecture, and reduce hardware costs.

V. Installation and Programming Key Points Installation steps

Preparations: Ensure that the P1 slot of the VME chassis is intact and the +5V power supply is stable; Prepare corresponding shielded cables according to the signal type (single-ended / differential) and range.

Jumper configuration: Set the A16/A24 base address jumper to avoid address conflicts; Configure the interrupt priority and vector jumper (if interrupt is required); Configure the gain and input range through resistors.

Module insertion: Align the XVME-500/4 to the 3U slot and push it in smoothly to ensure that the gold fingers are in good contact with the backplane P1, and tighten the panel fixing screws.

Wiring connection: Connect single-ended signals to the positive pole and ground, differential signals to the positive and negative poles and ground, and the shield layer to the positive pole for single-ended grounding, keeping away from strong interference equipment such as frequency converters and motors.

Power-on self-test: After the chassis is powered on, the POWER and RUN indicator lights are constantly on, indicating that the module is running normally; When collecting data, the corresponding indicator lights flash.

Programming flow (simplified)

Address mapping: Configure A16/A24 base address, map the A/D control, data, status, and interrupt registers to the system memory to establish a communication channel between the CPU and the module.

Channel configuration: Write the configuration word to the control register to set the channel mode (single-ended / differential), range, gain, and sampling mode.

Data acquisition: Start the A/D conversion, read the 12-bit conversion result through the data register, support query mode (reading the status register) or interrupt mode reading.

Data processing: Convert the raw data to the actual physical quantity (such as temperature, pressure), perform filtering, calibration, etc.

Interrupt configuration: Enable the required interrupts, write the interrupt service program to handle real-time data and fault alarms, improving the system response speed.

Reset operation: When the system resets, the module clears the buffer, turns off the interrupts, and clears the flags to ensure safe data collection.

Six. Core advantages

1. 12-bit high precision + high-speed sampling, powerful performance

12-bit A/D converter accuracy reaches ±0.5 LSB, conversion time ≤ 10μs, throughput 100kHz, balancing high precision and high-speed dynamic sampling requirements, suitable for precise measurement and high-speed signal scenarios.

2. Flexible multi-channel configuration + expandable, adaptable

16 single-ended / 8 differential switchable, support single-polarity / bipolar wide-range input, programmable gain 1–1000 times, suitable for weak to strong signals; can be expanded to 32 single-ended / 16 differential, meeting large-scale acquisition requirements.

3. 3U compact size + industrial-grade reliability, easy integration

3U single-high size saves slots, multi-layer board + gold-plated gold fingers design, operating temperature range of 0℃ to +65℃, anti-interference, anti-vibration, suitable for industrial harsh environments; standard VME bus compatibility, plug-and-play, easy integration and upgrade.

4. High resistance + high common-mode suppression, good signal integrity

Input impedance ≥ 10MΩ, reducing the influence of signal source load; common-mode suppression ratio ≥ 60dB, effectively suppressing common-mode interference, ensuring stable and reliable data collection in strong interference environments.

5. Resistance configuration gain + wide range, simplifying the system

Through resistance configuration gain, no need for additional signal conditioning module, suitable for various types of sensors; covers industrial standard voltage ranges, reducing external circuit design, simplifying the system architecture, and reducing costs.

Seven. Notes

The module has been discontinued. When purchasing, prefer to choose second-hand / refurbished spare parts with complete test reports, check the model (XVME-500/4) and version, to avoid faulty or incompatible modules.

When wiring, strictly distinguish single-ended / differential signals, differential input requires symmetry of the positive and negative lines, single-ended grounding of the shield layer;严禁 input beyond the range， otherwise the A/D converter will be burned out. The power supply is +5V bus power supply, ensuring voltage stability (±5%), to avoid abnormal collection due to voltage fluctuations;严禁 reverse connection of the power supply, to prevent module damage.

The wiring on site separates the strong and weak electrical parts， keeping away from strong interference equipment such as frequency converters and motors， reducing the influence of electromagnetic interference on signals， and avoiding data jumps or errors.

The working temperature is 0℃ to +65℃. During installation, ensure that the chassis has good ventilation to avoid overheating； in high-frequency collection scenarios， appropriately reduce the sampling rate to extend the module's lifespan.

During installation and maintenance， take precautions against static electricity， wear an anti-static wristband， and operate on an anti-static workbench； before plugging or unplugging the module， cut off the power supply of the chassis to prevent damage to the backplane and the module due to live plugging or unplugging.

The gain configuration needs to match the signal amplitude. Too small will cause signal saturation， and too large will result in insufficient resolution； it is recommended to calibrate the gain according to the actual signal range to ensure the collection accuracy.