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Home  Data Acquisition & Control Systems USB & Serial Products
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Features
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 | System Bus | | ISA (16-bit, AT) | | Data Rate per Port, Max. | | 115.2 kbps | | Number of RS-422/485 Serial Ports | | 2 |
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Introduction
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Our COMH 3089 ISA RS-422/485 serial communications board utilizes the 16550
UART--the same UART found in the IBM® asynchronous serial adapter. This means
that writing to one of our adapters is virtually the same as writing to the IBM
serial port. The output of each port may be set to half-duplex transmissions for
RS-485 operation, or to full-duplex transmission for RS-422 operation. RS-485
two- or four-wire operation is supported. Address locations are switch
selectable and interrupt request lines are set via on-board jumper blocks. Our
COMH 3089-E upgrades to the 16850 UART, with a 128-byte buffer.
The COMH 3189 models provide up to 500VDC of ground isolation. Full support
for Windows 95/98/2000/ME/NT is provided, though simplier applications may
require no additional drivers at all.
Our free Developer's Toolkit™, featuring drivers, samples, applications, and
programming information collected over the years, is included. Our goal is to
provide the developer with a single high-level programming interface that will
function with a wide variety of CyberResearch products across today's mainstream
operating systems, including DOS and Windows® 95/98/2000/ME/NT. |
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| System Bus |
ISA (16-bit, AT) | | Data Rate per Port, Max. |
115.2 kbps | | Data Rate per Port, Max. (simul. on all channels) |
115.2 kbps | | FIFO Buffer Length |
128 Bytes | | Card Backplate |
Standard (12cm) backplate | | Mounting Configuration |
Internal card | | Interrupt Levels Supported |
2
3
4
5
6
7
10
11
12
14
15 | | Interrupt Sharing Support |
Yes | |
| Serial Ports |
UART/Controller Type |
16850 | Number of RS-422/485 Serial Ports |
2 | Communications Protocol |
Asynchronous (async) | RS-422 Signals Supported |
RTS : Request to Send
CTS : Clear to Send
DCD (CD) Data Carrier Detect
DSR : Data Set Ready | RS-485 Signals Supported |
RTS : Request to Send
DTR : Data Terminal Ready
TD+ (TX+) Transmit Data +
TD- (TX-) Transmit Data -
RD+ (RX+) Receive Data +
RD- (RX-) Receive Data - | Connector(s) |
Number of Connectors |
2 | Connector Type |
DB-9 (9-pin) | Connector Gender |
Male (pin) | |
| Power Consumption |
+5V @ 600mA | |
| Operating System(s) Supported |
Windows NT
Windows 98
Windows 95
Windows 3.x
MS-DOS | | Software Included Free |
Developer's Toolkit software, featuring drivers, samples, applications, and programming information included on CD-ROM | |
| Operating Temperature |
32°F....122°F
(0°C....50°C)
| | Storage Temperature |
-4°F....158°F
(-20°C....70°C)
| | Relative Humidity, noncondensing |
10%....90% | |
| Safety/Approvals |
Meets UL standards
Meets CE standards
Meets FCC Part 15 - Class A EMI specs | | MTBF (average) |
150000 hours | |
| Card Length |
7.4"
(187.96mm)
| | Card Height |
4.2"
(106.68mm)
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Less Detail  |
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COMH 3089
ISA 2-Port RS-422/485 Serial Interface Card, 115.2 kbps Data Rate, 16-Byte FIFO Buffer, with 2 DB-9M Connectors |
$219.00 |
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COMH 3089-E
ISA 2-Port RS-422/485 Serial Interface Card, 115.2 kbps Data Rate, 128-Byte FIFO Buffer, with 2 DB-9M Connectors |
$259.00 |
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COMH 3189
ISA 2-Port RS-422/485 Serial Interface Card, 115.2 kbps Data Rate, 16-Byte FIFO Buffer, with 2 DB-9M Connectors and 500VDC Isolation |
$289.00 |
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COMH 3189-E
ISA 2-Port RS-422/485 Serial Interface Card, 115.2 kbps Data Rate, 128-Byte FIFO Buffer, with 2 DB-9M Connectors and 500VDC Isolation |
$329.00 |
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