Product Positioning
The XVME‑240 is a VME‑bus Digital Input/Output (DIO) module launched by XYCOM. It is suitable for scenarios such as industrial automation, process control, and experimental testing that require high-speed and reliable digital signal acquisition and control.
1. Key Technical Parameters
| Parameter |
Description |
| Module Model |
XVME‑240 (also marked as DIO XVME‑240) |
| Bus Standard |
VME‑bus (VME64, VME64x) |
| Number of Digital Channels |
32 channels (16 input channels + 16 output channels) |
| Input Level |
0 V / 5 V (TTL) or 0 V / 24 V (optional) |
| Output Level |
0 V / 5 V (TTL) or 0 V / 24 V (optional) |
| Maximum Sampling Frequency |
1 MHz (single channel) |
| Power Supply |
5 V DC (powered by VME‑bus) |
| Operating Temperature |
–40 °C ~ +85 °C |
| Dimensions |
Standard VME‑64 chassis (approximately 6U) |
| Interface |
70240‑001 PCB (motherboard) |
| Compatibility |
Can be used in series with other XVME series modules of XYCOM (such as XVME‑202, XVME‑530, etc.) |
2. Product Features
- High-speed Digital I/O: Supports a maximum sampling rate of 1 MHz, meeting the needs of high-speed signal acquisition.
- Multi-level Compatibility: Optional 5 V or 24 V input/output, compatible with a variety of on-site equipment.
- High Reliability: Adopts the reliable industrial bus structure of VME‑bus, with strong anti-interference and anti-shock capabilities.
- Modular Design: Can be flexibly combined with modules of the same series, such as XVME‑202 (digital I/O) and XVME‑530 (analog output), to build a complete I/O system.
- Easy Maintenance: Uses a standard PCB (70240‑001), no special tools are required for replacement or maintenance.
3. Structure and Composition
- Main PCB (70240‑001): Carries key components such as digital I/O circuits, buffer drivers, and optocoupler isolation.
- VME‑bus Interface: Provides connections for power supply, clock, address, data bus, etc.
- Input/Output Terminal Block: 24-pin or 2 rows of 16-pin terminals, corresponding to input and output channels respectively.
- Optocoupler Isolation Layer (optional): Provides input/output isolation in the high-voltage (24 V) version to improve system safety.
4. Typical Application Fields
| Industry |
Application Scenario |
| Industrial Automation |
Digital signal interconnection between production line PLCs and sensors/actuators |
| Process Control |
On-site switching value monitoring and control in chemical, petroleum, metallurgy and other industries |
| Experimental Testing |
Digital acquisition, triggering and synchronization of laboratory instruments |
| Transportation System |
Digital I/O control of facilities such as signal lights and barriers |
| Energy Management |
Status monitoring and remote control of power plants and distribution networks |
5. Installation and Maintenance Points
Installation
- Insert the module into the slot of the chassis that meets the VME‑64/64x standard, and ensure the card slot buckle is in place.
- After connecting the power bus, check whether the power supply voltage (+5 V) is normal.
- Connect the 5 V or 24 V terminal block as required, and pay attention to the correspondence between polarity and voltage level.
Debugging
- After power-on, use VME‑bus software (such as VxWorks, Linux‑VME) to read the module ID (70240‑001) to confirm recognition.
- Verify the input level and output response channel by channel through the test program, and put it into on-site use only after confirming there is no error.
Daily Maintenance
- Regularly check the tightness of the terminal block to prevent signal distortion caused by looseness.
- For the 24 V version, check whether the optocoupler isolation layer is aging or abnormally heated.
- In case of failure, first replace the PCB (70240‑001) or the corresponding terminal block; there is no need to replace the entire module body.
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