Adam Equipment Adam-4000 - Manual (Page 2)

RS-485 I/O Modules
4-
ADAM-4000 Series
Applications
Remote data acquisition
Process monitoring
Industrial process control
Energy management
Supervisory control
Security systems
Laboratory automation
Building automation
Product testing
Direct digital control
Relay control 
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Introduction
The ADAM-4000 series modules are compact, versatile
sensor-to-computer interface units designed specifically
for reliable operation in harsh environments. Their
built-in microprocessors, encased in rugged industrial
grade plastic, independently provide intelligent signal
conditioning, analog I/O, digital I/O, data display and
RS-485 communication. The ADAM-4000 series can be
categories into three groups: controllers, communication
modules, and I/O modules.
General Features
RS-485
The ADAM-4000 series of modules use the EIA RS-485
communication protocol, the industry’s most widely used
bi-directional, balanced transmission line standard. The
EIA RS-485 was specifically developed for industrial
applications. It lets ADAM-4000 modules transmit and
receive data at high rates over long distances. All modules
use optical isolators to prevent ground loop problems and
reduce damages caused by power surges.
Modbus Communication Protocol
Since Modbus is one of the most popular communication
standards in the world, Advantech has applied it as
the major communication protocol for eAutomation
product development. The new-generation ADAM-4000
modules now also support the Modbus/RTU protocol as
the remote data transmission mechanism. Featuring the
Modbus-support capacity, the new ADAM-4000 series
becomes universal remote I/O modules, which work with
any Modbus systems. The HMI server or controller can
read/write data via standard Modbus command instead of
complex ASCII code.
Watchdog Timer
A watchdog timer supervisory function will automatically
reset the ADAM-4000 series modules if required, which
reduces the need for maintenance. It also provides great
reliability to the system.
Flexible Networking
ADAM-4000 series modules need just two wires to
communicate with their controlling host computer over a
multidrop RS-485 network. Their ASCII-based command/
response protocol ensures compatibility with virtually any
computer system.
Modular Industrial Design
You can easily mount modules on a DIN-rail, a panel or
modules can piggyback on top of each other. You make
signal connections through plug-in screw-terminal
blocks, ensuring simple installation, modification and
maintenance.
Controller Features
Alternative Standalone Control Solution
A standalone control solution is made possible when
the ADAM-4000 series modules are controlled by the
ADAM-4501 or ADAM-4502 PC-based communication
controller (refer to Page 4-12 and 4-13). The ADAM-4501
and ADAM-4502 allow users to download an application
(written in a high-level programming language) into
its Flash ROM. This allows customization for your
applications.
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com