SERIES IOS-521 I/O SERVER MODULE EIA/TIA-422B SERIAL COMMUNICATION MODULE
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- 3 -
False Start Bit Detection -
Prevents the receiver from
assembling false data characters due to low-going noise
spikes on the RxD input line.
Programmable Baud Rate -
The internal baud rate
generator allows the 921.6K maximum baud rate to be
divided by any divisor between 1 and 2
(16-1)
, providing
support for all standard baud rates.
Interrupt Support -
Individually controlled transmit empty,
receive ready, line status, data set, & flow control interrupts
may be generated. Unique interrupts can be assigned to
each port. Interrupts use a priority shifting scheme based
on the last interrupt serviced, preventing the continuous
interrupts of one port from blocking the interrupts of another
port.
Socketed Termination and Bias Resistors
- The network
termination and bias resistors are installed in sockets on the
board and may be easily inserted or removed where
required.
Failsafe Receivers
- The receivers employed in this model
include a fail-safe feature which guarantees a high output
state when the inputs are left open or floating.
Internal Diagnostic Capabilities
- Loopback controls for
communication link fault isolation are included. Break,
parity, overrun, and framing error simulation are also
possible.
Compatible with Industry Standard UARTs
- The UART of
this IOS module is compatible with the industry standard
ST16C554/654, ST68C554/654, and TL16C544.
Additionally, this device can operate in a 16C450 UART
family software compatible mode. The transmit and receive
channels are double-buffered in this mode. Hold and shift
registers eliminate the need for precise synchronization
between the host CPU and the serial data.
Software Flow Control
- One or two sequential receive
data characters are compared to a programmed Xon or Xoff
character value. Data transmission can be suspended or
resumed via software flow control.
Sleep Mode
-The UART can be set via register control to a
special sleep mode to reduce power consumption when the
chip is not being used.
Conduction Cooled Module
- I/O modules employ
advanced thermal technologies. A thermal pad and module
cover wicks heat away from the module and transfers the
energy to a heat spreading friction plate. Heat moves to the
enclosure walls where it is dissipated by the external cooling
fins.
I/O SERVER MODULE SOFTWARE LIBRARY
IOS MODULE Win32 DRIVER SOFTWARE
Acromag provides a software product (sold separately) to
facilitate the development of Windows Embedded Standard
applications interfacing with I/O Server Modules installed on
Acromag Industrial I/O Server systems. This software (Model
IOSSW-DEV-WIN) consists of a low-level driver and Windows 32
Dynamic Link Libraries (DLLS) that are compatible with a number
of programming environments including Visual C++, Visual
Basic.NET, Borland C++ Builder and others. The DLL functions
provide a high-level interface to the IOS carriers and modules
eliminating the need to perform low-level reads/writes of
registers, and the writing of interrupt handlers.
IOS MODULE LINUX SOFTWARE
Acromag provides a software product (sold separately)
consisting of Linux software. This software (Model IOSSW-API-
LNX) is composed of Linux libraries designed to support
applications accessing I/O Server Modules installed on Acromag
Industrial I/O Server systems The software is implemented as a
library of “C” functions which link with existing user code
.
2.0 PREPARATION FOR USE
UNPACKING AND INSPECTION
Upon receipt of this product, inspect the shipping carton for
evidence of mishandling during transit. If the shipping carton is
badly damaged or water stained, request that the carrier's agent
be present when the carton is opened. If the carrier's agent is
absent when the carton is opened and the contents of the carton
are damaged, keep the carton and packing material for the
agent's inspection.
For repairs to a product damaged in shipment, refer to the
Acromag Service Policy to obtain return instructions. It is
suggested that salvageable shipping cartons and packing
material be saved for future use in the event the product must be
This board is physically protected with
packing material and electrically
protected with an anti static bag during
shipment. However, it is recommended
that the board be visually inspected for
evidence of mishandling prior to
applying power.
The board utilizes static sensitive
components and should only be handled at a static-safe
workstation.
BOARD CONFIGURATION
Power should be removed from the board when installing IOS
modules, cables, termination panels, and field wiring. Refer to
the following discussion for configuration and assembly
instructions. Model IOS-521 communication boards have no
hardware jumpers or switches to configure.
CONNECTORS
Connectors of the IOS-521 module consist of one IOS
module field I/O connector, and one IOS module logic connector.
These interface connectors are discussed in the following
sections.
IOS Field I/O Connector (P2)
P2 provides the field I/O interface connections for mating IOS
modules to the carrier board. P2 is a 50-pin female receptacle
header (AMP 173279-3 or equivalent) which mates to the male
connector of the carrier board (AMP 173280-3 or equivalent).
This provides excellent connection integrity and utilizes gold-
plating in the mating area. The field and logic side connectors
are keyed to avoid incorrect assembly.
