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Black Box Corporation.
Black Box Corporation • 1000 Park Drive • Lawrence, PA 15055-1018 • Tech Support: 724-746-5500 • www.blackbox.com • e-mail: info@blackbox.com
RS-422/485 SERIAL INTERFACE PLUS
IC051C, IC176C,
IC057C, IC178C
IC050C,
IC171C
Integrate your industrial RS-422/485
applications and your PC.
Key Features
Connect up to 32
peripherals per port
under DOS, OS/2 , or
Windows in your 485
network up to 4000 feet
(1219.2 m) away.
®
®
Supports speeds up to
115.2 or 460.8 kbps.
Can control the RS-485
driver-enable signal
automatically.
COM-1 through COM-4
addressable.
Choose from as many
as 11 IRQ selections.
Models available with
16550 or 16950
UARTs.
14144
he RS-422/485 Serial Interface
Plus is Windows compatible
without the need for special
software or drivers.
Today’s mainstream operating
systems, such as Windows
3.x/Windows 95, 98 and Windows
NT™, and Windows 2000, do not
give applications direct control
over hardware devices.
Applications must make calls to a
driver substructure. Therefore,
features not supported by existing
drivers, such as RS-485, are very
difficult to implement because
lower-level I/O handling is
required.
In operating systems that don’t
have a standard driver to support
RS-485 communications, you
need to provide the driver
development. What’s worse, once
a driver is developed, it must be
maintained to support subsequent
releases of the operating system.
T
However, the RS-422/
485 Serial Interface Plus
automatically handles low-level
RS-485 driver maintenance via
hardware. Therefore, initial
development can be targeted for
RS-232, debugged, tested, and
then implemented as RS-485. The
RS-422/485 Serial Interface Plus
was designed for simple
integration of RS-485 networks—
with little or no programming
changes—within Windows,
Windows NT, and other protectedmode operating systems.
The RS-422/485 Serial
Interface Plus comes in 1- and 2Port models. A 2-Port model with
Optical Isolation is also available.
Optical Isolation eliminates the
effects of spikes, surges, and
ground differences to protect
communications devices
connected to the PC.
Choose from 16550 or 16850
UARTs. Cards with the 16550
UART feature a 16-byte FIFO and
run at speeds of up to 115.2 kbps.
Cards with the 16850 UART have a
128-byte FIFO and operate at
sustained speeds of up to
460.8 kbps.
1
Specifications
Buffer: IC050C, IC051C, IC057C:
16-byte FIFO; IC171C, IC176C,
IC178C: 128-byte FIFO
Speed: IC050C, IC051C, IC057C: Up
to 115.2 kbps; IC171C, IC176C,
IC178C : 460.8 kbps (sustained)
Communication Chip: IC050C,
IC051C, IC057C: 16550 UART;
IC171C, IC176C, IC178C: 16950
UART
Connectors: IC050C, IC171C: (1)
DB25 male; IC051C, IC057C,
IC176C, IC178C: (2) DB9 male
Maximum Distance: 1219.2 m
Operation: 2- or 4-wire
Optical Isolation: IC057C, IC178C:
500 VDC
Protocol: Async
14144
Power: From the PC bus
Size: Half-card
Ordering Information
ITEM
PRODUCT NAME
CODE
ORDER CODE
RS-422/485 Serial Interface Plus
1-Port
16550 UART....................................................IC050C
16950 UART....................................................IC171C
2-Port
16550 UART....................................................IC051C
16950 UART....................................................IC176C
2-Port (with Optical Isolation)
16550 UART....................................................IC057C
16950 UART....................................................IC178C
To connect your RS-422/485 Serial Interface Plus, you
may also need…
RS-530 Data Cable ............................................EVN530
Modular Thumbscrew Adapter Kits
For IC050C:
DB25 female±RJ-45 Female (8-Wire)..................FA771
For IC051C:
2
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