XVME-904 Serial Communication Adapter Module

Features:
Convert TTL signal
User configurable
Four DB-25 connectors
The XVME-904 serial communication adapter module converts the TTL signals provided on the P2 connector of the XVME-420 and XVME-428/3 serial communication modules into standard RS-232C or RS-422A electrical signals. SCA can be configured by users for RS-232C or RS-422A operations. Its RS-232C or RS-422A signals can be connected to the user through four DB-25 connectors on the front panel.
The SCA module is a card installed in a standard VMEbus dual height chassis. However, it is not connected to the backplane connectors P1 and P2. On the contrary, a cable (provided with the kit) connects the P2 connector on XVME-420 or XVME-428/3 to the back of XVME-904.

Possible Configurations

1. ​Digital I/O Module:
   • ​Inputs/Outputs: 32/64 channels (sourcing/sinking, 24 VDC).
   • ​Isolation: 500–1500 VAC opto-isolation for noise immunity.
   • ​Interrupt Support: Configurable interrupt handling for event-driven systems.
2. ​Serial Communication Module:
   • ​Ports: 4/8 RS-232/422/485 ports with configurable baud rates (up to 115.2 kbps).
   • ​Protocol Support: Modbus RTU/ASCII, DF1, or custom protocols.

​Typical Applications

• ​Factory Automation: Machine control, sensor interfacing, and PLC communication.
• ​Military Systems: Ruggedized data acquisition in defense platforms.
• ​Energy & Utilities: Monitoring and control in power distribution or oil/gas pipelines.
• ​Transportation: Rail signaling or vehicle control systems.
• Technical Specifications (Estimated) ​Parameter ​Details ​Bus Interface VMEbus (A32/D32 addressing) ​Power Supply +5 VDC (VMEbus backplane) ​I/O Voltage 12–24 VDC (isolated) ​Data Transfer Rate Up to 40 MB/s (VMEbus-dependent) ​Enclosure Conformal-coated PCB for humidity/dust ​Dimensions 6U VME form factor (233 x 160 mm)
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