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The 3055 ISA serial interface card provides a single RS-422 or RS-485 port for connection to serial devices. Individually selectable addresses and extended "AT" interrupts allow for seamless integration into OS/2 and Windows systems. The ULTRA 485's "auto enable" design eliminates RS-485 communications roadblocks under Windows and OS/2. The ULTRA 485 appears to the host system as a standard COM: port requiring no special drivers or additional software. For user's that require custom baud rates, isochronous communications, or 9-bit protocol, the 3055 ISA serial interface is available with the Oxford 16C950 UART, part number 3055-SN.
| Host Interface | ISA |
|---|---|
| # of Ports | 1 |
| Electrical Interface | RS-422, RS-485 |
| UART | 550 UART |
| Serial Connector(s) | DB25M |
| Communications Chip | 16550 |
| Max Data Rate | 115.2K bps |
| Max Data Distance | 4000 feet |
| RS-485 Operation | Full Duplex (4 wire) Half Duplex (2 wire) |
| Humidity Range | 10 - 90% Relative Humidity, Non-Condensing |
• Automatic control of RS-485 driver enable signal
• Selectable COM: port addresses
• Selectable and shareable IRQ level (2-5, 7, 10-12 and 15)
• Automatically handles RS-485 enable and disable
• Selectable COM: port addresses
• Selectable and shareable IRQ level (2-5, 7, 10-12 and 15)
• Automatically handles RS-485 enable and disable
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