BusWorks Model XT1533-000
4 CH Current 4 CH Digital I/O w/USB & Profinet
Acromag, Inc. Tel: 248-295-0880
- 29 -
http://www.acromag.com
- 29 -
http://www.acromag.com
How it Works…
The outputs and excitation and USB, the network, and power circuits are isolated
from each other. The USB port ground is common to the output circuit return. The
USB port ground of most PC’s is also common to the USB cable shield and earth
ground. I/O could otherwise be grounded or ungrounded. For this reason, it is
recommended that USB signals be isolated when connected to a PC to prevent a
ground loop from occurring between the PC earth ground and a grounded I/O signal,
which could have the negative effect of driving digital upset or noise for severe
ground loop currents.
About Profinet IO
You can obtain more information
on Profinet at the Profibus &
Profinet International (PI) web
site
www.profinet.com/pi
or
www.profibus.com
. You can also
learn more about Profinet at the
All Things Profinet web site
www.allthingsprofinet.com
.
Profinet is an open Ethernet standard for industrial communication, but with
enhancements tailored for realtime communication and industrial automation
applications. In particular, Profinet attempts to address the needs of factory and
processs automation applications, safety applications, and drive technology for clock-
synchronized motion control applications, providing good realtime performance,
improved determinism, advanced configuration capability, diagnostic capability, and
alarm handling features. Profinet is standardized in IEC 61158 and IEC 61784, and
Profinet products are required to be certified by Profibus & Profinet International
(PI), ensuring world-wide compatibility. Profinet IO is comprised of standard
Ethernet mixed with IT protocols, including the transport and application layer
protocol (TCP/IP), especially selected for industrial automation applications. In this
way, Profinet offers scalable performance with protocols providing three different
data channels: TCP/IP for non realtime application data, Real Time (RT) for realtime
transfer of critical process data, and Isochronous Real Time (IRT) for motion control
applications.
Profinet IO follows a Provider/Consumer model for data exchange and operates
similar to Profibus. This device operates as an IO-Device on Profinet IO networks. A
plant Profinet system has at least one IO-Controller and one or more IO-Devices, and
may optionally utilize an IO-Supervisor. Thus, Profinet IO networks recognize three
device classes as follows:
IO-Device (This Module): This is a distributed I/O field device that connects to 1 or
more IO-Controllers via Profinet IO. It is comparable to the slave devices defined by
Profibus. It functions as the provider of Input data and the consumer of Output data.
IO-Controller (PLC): Several IO-Devices are connected to an IO-Controller. This IO
Controller is typically the programmable logic controller (PLC) on which the
automation program runs. Its function is comparable to a Class 1 Master in Profibus.
The IO-Controller provides output data to the configured IO devices and is the
consumer of the input data of I/O devices.
IO Supervisor (PC or HMI): This can be a programming device, Personal Computer
(PC) w/software, or a Human Machine Interface (HMI) device, and is used for
commissioning or for diagnostic purposes. It is comparable to a Class 2 master in
Profibus. IO-Supervisors are usually integrated only temporarily for commissioning
or troubleshooting purposes on a Profinet network.
You may also obtain a copy of the Profinet standard from the Profinet web site at
www.profibus.com
. You can get the GSDML file for this model from the CDROM
shipped with your unit, or you may download it from our web site at
www.acromag.com
, or from the Profinet web site at
www.profibus.com
.