Acromag / Xembedded / Xycom XVME-490 Quad RS-232 Serial I/O Module

The XVME-490 is a quad RS-232 serial I/O module designed for VMEbus systems operating to IEEE 1014 specification. It has four independent, full-duplex RS-232C serial ports, each capable of asynchronous, byte-synchronous, and bit-oriented protocols. The module uses two Zilog Z8530 SCC chips and features independent baud rate generators and modem control signals (RTS, CTS, DCD, DTR) for each channel.

Technical Specifications

• Double-high (6U) VMEbus module


• I/O routed via VMEbus P2 connector


• A16:D08(O) DTB Slave interface


• 1 Kbyte jumper-selectable address boundary allocation Serial Interfaces


• 4 independent full-duplex RS-232C serial ports


• Two Zilog Z8530 SCC serial communication controllers


• Each channel independently programmable


• Independent baud rate generator per channel Interrupts


• Jumper-selectable to any of seven VMEbus interrupt levels


• 16 different interrupt vectors available from two SCC chips


• Programmable IACK vector with source-based alteration Power Requirements


• +5 V @ 1.1 A typical, 1.3 A maximum


• +12 V @ 100 mA typical, 110 mA maximum Environmental Ratings


• Operating temperature: 0° to 65° C


• Non-operating temperature: -40° to 85° C


• Humidity: 20% to 80% RH, non-condensing


• Operating altitude: Sea level to 10,000 ft (3048 m)


• Non-operating altitude: Sea level to 40,000 ft (12,192 m)


• Operating vibration: 5 to 2000 Hz, 0.015" peak-to-peak displacement, 2.5 g maximum


• Non-operating vibration: 5 to 2000 Hz, 0.030" peak-to-peak displacement, 5.0 g maximum


• Operating shock: 30 g peak, 11 msec duration


• Non-operating shock: 50 g peak, 11 msec duration

Key Features

• Four independent serial channels with full modem signal control


• Flexible protocol support: asynchronous, byte-synchronous, bit-oriented modes


• Flexible interrupt configuration across VMEbus levels


• Low power consumption profile

Typical Applications Industrial automation, data acquisition systems, and multi-channel serial communications within VME-based embedded environments.

Compatibility & Integration Related Acromag/Xembedded/Xycom modules include XVME-400 (single-high RS-232), XVME-401 (single-high RS-422A/RS-485), and XVME-491 (double-high RS-422A/RS-485).