72-UOL Datasheet, PDF (1/2 Pages) Grayhill, Inc – NETWORK INTERFACES OpenDAC® for Ethernet

OpenDAC^® I/O System
NETWORK INTERFACES
OpenDAC^® for Ethernet
FEATURES
• Use Ethernet to Control/Monitor up
to 32 Analog and/or Digital I/O
Channels using OpenLine^® I/O
Modules
• Network Multiple OpenDACs^®
• 10Base-T and 100Base-TX Support
• Extremely Fast Response Times
over Network
• Support Modbus/TCP Protocol
and HTTP
• Use Web Browser for Configuration,
Monitoring and Control of I/O
modules
• Diagnostic LEDs
• CE Certified
• DIN Rail Mounting
• Modbus TCP
ETHERNET UNIT ON OPENDAC® SYSTEM
APPLICATIONS
Stand Alone Control
Local Control & I/O
Remote I/O
Distributed I/O
SCADA
RTU
GENERAL DESCRIPTION
The OpenDAC^® for Ethernet network inter-
face is a remote slave that responds to
Modbus/TCP commands that it receives over
the network. The status and configuration of
up to 32 OpenLine^® analog or digital I/O chan-
nels is stored and constantly refreshed.
OpenDAC^® for Ethernet is self-configuring. On
power up, the controller will identify the types
of I/O modules present. The unit will then con-
tinuously scan and update the digital and ana-
log modules. Digital input channels can be
setup for latching operation. The OpenDAC^®
for Ethernet supports the OpenLine^® Smart
Module Protocol (SMP) that allows field cali-
bration and parameter setup of I/O modules.
Each OpenDAC^® or third party device on the
network is assigned a unique IP address. There
are three methods of assigning the internet
protocol address -BOOTP, DHCP, and a static
method. The controller is shipped with the default
IP address of 128.0.0.1. The IP address can be
changed using a web browser. The web browser
can also be used to select BOOTP or DHCP to
assign the IP address. Communication data
rates are either 10 Mbps or 100 Mbps.
OpenDAC^® automatically detects whether it is
connected to a 10Base-T or 100Base-TX
network, eliminating switch settings and
simplifying set up. Network and controller status
can be monitored by status LEDs.
Each OpenDAC^® incorporates a communication
watchdog timer that monitors communication
from the Modbus/TCP master. When the
watchdog is enabled and the slave does not
receive a valid Modbus/TCP message within a
specified time, the OpenDAC^® will set all output
modules to the stored fault-state values. Should
a valid message be received, the timer is reset
and communication resumes. All configuration
parameters are displayed and modified using a
web browser. The configuration parameters
are password protected to provide security
against unauthorized access.
ANALOG & DIGITAL I/O
MODULES
OpenDAC^® for Ethernet connects directly to
one or two 16 channel racks. Any combination
of analog and digital I/O modules may be used.
On power up, the OpenDAC^® scans and stores
the I/O configuration and makes the information
available to the master.
In addition to simple On/Off instructions, the
OpenDAC^® allows you to:
• Read linearized thermocouple and RTD
temperature values
• Detect rising or falling edges
• Latch momentary input events
• Set the level of analog outputs
OpenDAC
2
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: [phone] • Fax: [phone] • www.grayhill.com