The ADAM-4500 has a DB-9 pin connector as its RS-232 port connector. Since the connection for an RS-232 interface is not standardized, different devices implement the RS-232 connection in different ways. If you are having problems with a serial device, be sure to check the pin assignments for the connector. The following table shows the pin assignments for the ADAM- 4500's RS-232 port.

Pin No. Description

1DCD

2RxD

3TxD

4DTR

5GND

6DSR

7RTS

8CTS

9RI

Table 2-1: Pin Assignments of RS-232 Port

RS-485 Connection

The RS-485 standard supports half-duplex communication. This means that just two wires are needed to both transmit and receive data. Handshaking signals (such as RTS, Request To Send) are normally used to control the direction of the data flow. A special I/O circuit in the ADAM-4500 automatically senses the direction of the data flow and switches the transmission direction. No handshaking signals are necessary. This RS-485 control is completely transparent to the user.

We recommend that shielded twisted-pair cables complying with the EIA RS-485 standard be used in the network to reduce interference. Only one set of twisted-pair cables is required to transmit both Data and RTS signals. We advise use of the following standard colors for the communication cables.

DATA +

Yellow

DATA -

Green

Chapter 3 Programming and Downloading

This chapter explains how to program applications and download programs into the ADAM-4500 controller. Additionally, it points out limitations and concerns of which you should be aware.

3.1 Programming

The operating system of ADAM-4500 is ROM-DOS, an MS-DOS equivalent system. It allows users to run application programs written in assembly language as well as high level languages such as C or C++. However, there are limitations when running application programs in the ADAM-4500. In order to build successful applications, you should keep the following limitations and concerns in mind.

Mini BIOS Functions

The ADAM-4500 provides only two serial communication ports for connecting peripherals, so the

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Advantech ADAM-4500 user manual Programming, Pin No. Description, RS-485 Connection, Mini Bios Functions
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ADAM-4500 specifications

The Advantech ADAM-4500 series represents a critical advancement in the field of industrial automation and remote monitoring with its versatile and robust features. Designed for a wide range of applications across industries, from manufacturing to environmental monitoring, the ADAM-4500 series bridges the gap between traditional data acquisition systems and modern IoT solutions.

One of the main features of the ADAM-4500 series is its ability to support both Ethernet and RS-485 communication, providing flexibility for various network setups. This dual communication capability allows users to connect the devices seamlessly into existing infrastructures while ensuring reliable data transmission over extended distances.

Another key characteristic of the ADAM-4500 series is its modular design. Users can easily configure and expand their systems according to specific project requirements by adding different I/O modules. The series supports a variety of analog and digital I/O modules, catering to diverse input and output needs. This modularity ensures that the system can evolve as technology advances or project demands change.

In terms of technology, the ADAM-4500 incorporates various protocols, including Modbus TCP and RTU, making it compatible with a wide range of SCADA and industrial automation software. Such compatibility simplifies integration and enhances communication across devices, allowing for centralized monitoring and control systems that improve operational efficiency.

The ADAM-4500 series also boasts embedded web servers, enabling users to access real-time data and configure the device through any web browser. This remote access capability is pivotal for monitoring critical parameters without the need for local presence, which is especially useful in extensive or hazardous environments.

In summary, the Advantech ADAM-4500 series combines robust hardware with advanced software features, providing a flexible, scalable, and efficient solution for data acquisition and remote monitoring in industrial applications. With its modular design, comprehensive communication protocols, and remote access capabilities, the ADAM-4500 series stands out as a reliable choice for organizations aiming to enhance their automation and monitoring systems while preparing for the future of IoT integration.
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