COM128 Installation and Operation Manual

SchneiderElectric

4.2.3CONNECTION TO A MODEM

PORT SELECTION

A telephone or radio modem typically acts as a DCE RS-232 device. Therefore, the modem’s RS-232 port should be connected to the COM128’s DTE RS-232 port. Refer to Figure 4.2.3.

SWITCH SETTINGS

To properly communicate with the modem, the COM128 must be configured as a DTE RS-232 device .

If the modem requires RTS-CTS handshaking, the RTS/CTS Flow Control function provided by the COM128 should be enabled. This will force the COM128 to buffer all RS-485 data received until the modem is ready to receive the data. Most radio modems require this mode, as do some telephone modems. Refer to your modem’s operation manual to see if your modem provides or requires this handshaking. .

Refer to Section 3.2, 'Mode Descriptions', for examples of switch settings for this application.

Figure 4.2.3 RS-232 Connection to Modem

RS-232 Cable

50 ft. max.

Telephone, Radio, or

Fibre Optic Modems

Telephone

Network, Radio or

Fibre Optic Link

IBM PC

RS-232

Cable

50 ft. max.

 

 

 

 

 

 

DCE

 

RS-232

 

PORT D

PORT

485-RS

 

 

PORT

PORT C

 

 

 

 

DTE

 

 

 

 

 

 

 

 

PORT B

 

 

 

 

PORT A

 

 

 

 

 

 

COM128

RS-232 to RS-485 Converter

SHLD

To

RS-485

Bus

RS-485 Cable

22 AWG shielded twisted pair. Total length: 4000 ft. maximum.

8

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PowerLogix COM128 installation and operation guide 3 RS-232 Connection to Modem, Connection to a Modem

COM128 specifications

The PowerLogix COM128 is an advanced, high-performance communication module designed to facilitate robust and efficient data exchange in various applications. It is particularly favored in sectors such as industrial automation, smart grid systems, and telecommunication networks.

One of the main features of the COM128 module is its flexibility in communication protocols. It supports various standards including Modbus, CAN, and Ethernet/IP, which enables seamless integration into different systems. This adaptability is crucial for industries that employ diverse equipment and protocols, allowing the COM128 to serve as a single communication interface.

The COM128 also boasts impressive data transmission speeds, typically reaching up to 115.2 kbps, ensuring that even large volumes of data can be exchanged quickly and reliably. This is essential in environments where real-time data processing and timely decision-making are critical. The module is capable of handling multiple simultaneous connections, enhancing its efficiency and throughput.

In terms of technology, the COM128 is built on a compact and robust architecture that guarantees durability and longevity. It features advanced error detection and correction mechanisms, which help maintain data integrity during transmission. Additionally, the module is equipped with an integrated power management system that optimizes energy consumption, making it an eco-friendly choice for businesses looking to reduce their carbon footprint.

The characteristics of the PowerLogix COM128 further enhance its appeal. It is designed to operate in a wide range of environmental conditions, with an operational temperature range from -40°C to +85°C. This makes it ideal for deployment in harsh industrial settings where extreme temperatures can be a concern. Furthermore, the module is compact and lightweight, allowing for easy installation and integration into existing systems without the need for significant modifications.

A user-friendly interface accompanies the COM128, providing intuitive configuration options and diagnostics tools. This ease of use reduces the learning curve for engineers and technicians, thereby accelerating project implementation times.

In summary, the PowerLogix COM128 is a versatile and powerful communication module that meets the needs of various industries. With its multi-protocol support, high data transmission speeds, advanced technologies, and robust characteristics, it stands out as a reliable solution for efficient data communication in modern applications.