Xycom XVME-400 I/O module

Xycom XVME-400

Xycom XVME-400 Overview

The Xycom XVME-400 is a VMEbus Quad Serial I/O module developed by Xycom Automation, designed specifically for industrial control applications requiring multiple serial communication channels within a VME system.

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1. Basic Features

Item	Description
Module Type	Single-high, single-wide VMEbus module
Interface Count	4 independent RS-232C serial ports (each individually programmable)
Core Chipset	Two Zilog Z8530 Serial Communication Controllers (SCC), supporting asynchronous, byte-synchronous, and bit-oriented protocols
Power Requirements	+5 V ≈ 1.1 A (typical), +12 V ≈ 100 mA (typical)
Dimensions	3.9 in × 6.3 in (approx. 99 mm × 160 mm)
Operating Temperature	0 °C to 65 °C (operational), –40 °C to 85 °C (storage)
Protection Standard	Complies with VMEbus specification (IEEE 1014), using A16:D08(O) DTB Slave interface

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2. Functional Highlights

• Four Independent Serial Ports:
  Each channel features its own baud rate generator and modem control signals, enabling flexible communication with diverse devices.
• Interrupt Support:
  Jumper-selectable interrupts across seven VMEbus interrupt levels allow rapid host system response.
• Full VMEbus Compatibility:
  Fully compliant with the VMEbus standard; can be directly installed into a standard VME chassis P1 backplane without any adapter board.
• Flexible Configuration:
  Baud rate (up to 57.6 kbps asynchronous / 500 kbps synchronous) and hardware flow control signals can be configured via internal register programming.

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3. Installation and Usage Notes

• Physical Installation:
  Align the module with the chassis guide rails, insert with the handle facing downward, and push gently until the connector seats firmly (single-high module uses P1 backplane only).
• Jumper Configuration:
  Set the desired interrupt level using the jumper block located on the rear of the module.
• Software Driver:
  The accompanying MS-DOS/Windows Board Support Package (BSP) provides 16-bit library routines supporting VME read/write, DMA, and interrupt handling functions.

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4. Typical Application Scenarios

• Industrial Automation:
  PLC or SCADA systems requiring simultaneous RS-232C communication with multiple instruments, sensors, or host controllers.
• Testing and Measurement:
  Multi-channel data acquisition systems for laboratory or production-line use.
• Embedded Systems:
  Integration of serial debugging or peripheral control functions within a VME-based platform.

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Summary

The Xycom XVME-400 is a robust and proven VMEbus serial I/O module. With four independent RS-232C ports, flexible interrupt and baud rate configuration, and a design optimized for industrial environments, it is widely used in control systems requiring reliable multi-channel serial communication.

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