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ISA Serial Interface Card with 4 RS-422/485 Ports, 16C950 UART, & 4 DB-9M Connectors on Included Cable
ISA Serial Interface Card with 4 RS-422/485 Ports, 16C950 UART, & 4 DB-9M Connectors on Included Cable
COMH 3440-X

ISA 4-Port RS-422/485 Serial Interface Card, 460.8 kbps Data Rate, 128-Byte FIFO Buffer, 16C950 UART, with 4 DB-9M Connectors on Included Cable

Qty   Price (with options selected)
Shipping: Call for Availability
 Features
System BusISA (16-bit, AT)
Data Rate per Port, Max.460.8 kbps
Number of RS-422/485 Serial Ports4
 
Introduction

Automatic RS-422/485 Serial Boards

Seamlessly link RS-422/485 devices to your PC under Windows 95/98/ME/2000/NT4, DOS, QNX Linux, OS/2, and other protected-mode operating systems.

Standard 16550 (16-byte) UARTs reduce processor servicing. Our upgrade models feature 16850 UARTs. Each 16850 provides 1 128-byte buffer to simply programm,ing for high-speed I/O applications. The 4-port COMH 3440 supports quad data rates up to 460.8 kbps.

While each port on our COMH 3440 models may be set to a separate IRQ, the ability to set the four ports to share one IRQ under Windows is a truly useful feature. Each PC system has a very limited number of available interrupts--by sharing one IRQ, there are fewer conflicts with other cards and system resources. Our NT setup utility simplifies installation and NT registry configuration.

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.

  Detailed Specifications  More Detail
Product Information
System Bus ISA (16-bit, AT)
Data Rate per Port, Max. 460.8 kbps
I/O Ports
Serial Ports UART/Controller Type 16C950
Number of RS-422/485 Serial Ports 4
Detailed Specifications More Detail
 
Ordering - Includes Options Indicated Below
COMH 3440
ISA 4-Port RS-422/485 Serial Interface Card, 460.8 kbps Data Rate, 16-Byte FIFO Buffer, with 4 DB-9M Connectors on Included Cable
$319.00
COMH 3440-E
ISA 4-Port RS-422/485 Serial Interface Card, 460.8 kbps Data Rate, 128-Byte FIFO Buffer, with 4 DB-9M Connectors on Included Cable
$399.00
COMH 3440-X
ISA 4-Port RS-422/485 Serial Interface Card, 460.8 kbps Data Rate, 128-Byte FIFO Buffer, 16C950 UART, with 4 DB-9M Connectors on Included Cable
$399.00

I/O Cable
None  
CBL 37409
37-Pin Round Cable, DB-37F to 4xDB-9M, 3 ft
$29.00
Catalog # Shipping Price (with options) Qty  
COMH 3440-X Call for Availability
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