RS-232RS-422 INTERFACE CONVERTER

2. Introduction

The RS-232↔RS-422 Interface Converter provides bi-directional synchronous or asynchronous conversion of all commonly used RS-232 and RS-422 signals. The unit is designed to operate with one port configured as Data Terminal Equipment (DTE) and the other port as Data Communications Equipment (DCE). Operation is not recommended with both ports configured either DCE or both DTE, when operating in synchronous mode.

The unit has two user-selectable configurations: one for connecting RS-422 modem equipment to RS-232 terminal equipment (DCE to DTE) and one for connecting RS-232 modem equipment to RS-422 terminal equipment (DCE to DTE). Both configurations allow bi-directional data transfer. Typical applications are shown in Figure 2-1.

Things to consider when operating the converter:

 

 

DIP-SHUNT SETTINGS:

 

 

RS-232 RS-422

 

 

DTE

DCE

 

MODEM

INTERFACE

 

ELIMINATOR

CONVERTER

SYNC

(RS-232)

 

SYNC

 

 

RS-422

RS-232

 

 

 

 

COMPUTER

COMPUTER

 

 

 

 

 

 

DIP-SHUNT SETTINGS:

 

RS-422 RS-232

 

 

DTE

DCE

 

RS-422

INTERFACE

RS-232

MODEM

CONVERTER

 

TERMINAL

 

 

 

 

DIP-SHUNT SETTINGS:

 

RS-232 RS-422

 

 

DTE

DCE

 

RS-232

INTERFACE

RS-422

MODEM

CONVERTER

TERMINAL

 

 

 

4-WIRE CABLE

DIP-SHUNT

SETTINGS:

RS-232 RS-422

DCE DTE

INTERFACE

PCCONVERTER

 

 

6 (R-)

T-

 

 

24 (R+)

T+

 

 

4 (T-)

R-

 

 

22 (T+)

R+

INDUSTRIAL

CONTROLLER

Figure 2-1. Various Applications Showing DCE/DTE Settings.

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Black Box RS0232, RS-422 manual Introduction, Modem Converter Terminal

RS0232, RS-422 specifications

Black Box is a prominent provider of high-quality networking solutions, and their RS0232 and RS-422 products exemplify their commitment to excellence in data communication. These serial interface converters are pivotal for seamless connectivity across various devices, ensuring reliable and robust signal transmission in industrial and commercial applications.

The RS0232 converter is designed to facilitate communication between RS-232 serial ports and RS-422/RS-485 systems. One of its standout features is the ability to support data rates up to 115.2 kbps, making it suitable for fast-paced environments where high-speed communication is essential. The unit is engineered for full-duplex communication, allowing simultaneous transmission and reception of data, which enhances efficiency.

In terms of connectivity, the Black Box RS0232 converter provides a DB9 female connector for RS-232, while it leverages terminal block connections for RS-422/RS-485. This versatility provides users with flexible integration options, enabling a wide range of applications from point-to-point to multipoint configurations.

On the other hand, the RS-422 converter embodies robust design principles that make it resilient in challenging operating conditions. It features surge protection mechanisms, ensuring the safety of connected devices against voltage spikes and transients. The unit operates over a wide temperature range, typically between -40°C to 70°C, making it suitable for outdoor installations and harsh environments.

Both converters are equipped with LED indicators that provide real-time status updates, such as power, data transmission, and interface activity. This feature aids in diagnostics and troubleshooting, allowing users to quickly identify and resolve potential issues.

In terms of technologies, these converters utilize differential signaling, which improves noise immunity and increases the effective transmission distance up to 4000 feet. This capability is particularly advantageous for long-distance data transmission, common in industrial settings and expansive facilities.

Overall, Black Box's RS0232 and RS-422 converters are characterized by their durability, high performance, and user-friendly design. They offer exceptional reliability and efficiency, making them indispensable tools for businesses requiring robust data communication solutions. Whether used in automation, telecommunications, or other sectors, these converters stand out as reliable components that enhance operational capabilities and ensure data integrity across networks.