XYCOM XVME-240

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

1. 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.
2. After connecting the power bus, check whether the power supply voltage (+5 V) is normal.
3. Connect the 5 V or 24 V terminal block as required, and pay attention to the correspondence between polarity and voltage level.

Debugging

1. After power-on, use VME‑bus software (such as VxWorks, Linux‑VME) to read the module ID (70240‑001) to confirm recognition.
2. 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

1. Regularly check the tightness of the terminal block to prevent signal distortion caused by looseness.
2. For the 24 V version, check whether the optocoupler isolation layer is aging or abnormally heated.
3. 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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