Black Box IC113C, RS-485, IC175C manual RS-232 Interface Options, Headers E9 and E10 in Normal Mode

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CHAPTER 4: Option Selection

N

S

M

 

 

 

 

 

 

 

 

Figure 4-2. Headers E9 and E10 in Normal Mode.

Set jumpers to “N” for single interrupt mode. This setting is the normal setting for most applications.

Set jumpers to “S” for shared interrupt mode for all ports sharing an IRQ except one. Set that port block for “M.” This provides the pull-down resistor circuit that makes sharing of IRQ’s possible. If you are using more than one Dual Port RS-232/422/485 Serial Interface or a compatible card in a bus, you should only have one port set to “M.”

Set jumpers to “S” if you are using more than one Dual Port RS-232/422/485 in a bus or if you wish to completely remove the pull-down resistor for hardware compatibility. Setting the board in this configuration when it is not accompanied by a pull-down resistor will prevent the ports from triggering an interrupt.

4.2 RS-232 Interface Options

To select the RS-232 mode of operation, install DIP shunts in the sockets found at E5 and E8. E5 sets Port 1 and E8 sets Port 2. These DIP shunts are completely independent of each other, allowing the user to select a single- port RS-232 or a single-port RS-422.

There are no modem control options for the RS-232 interface: all control signals are implemented. If your software requires certain handshaking signals to be active, then you must connect them either to the device with which you are communicating or you can satisfy the handshake signal requirements by connecting pins 7 to 8 (RTS to CTS) and pins 4 to 6 to 1 (DTR to DSR & DCD). Make these connections on the DB9 connector that connects to each port. Refer to Figure 4-3 when making these connections. (The table on page 4 lists the RS-232 pinout descriptions.)

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Contents Dual Port RS-232/422/485 Serial Interface FCC and IC STATEMENTS, Trademarks Dual Port RS-232↔422/485 Serial Interface NOM Statement Contents Specifications Connectors 2 DB9MWhat’s Included IntroductionOverview Features IntroductionTechnical Description RS-232RS-485 Address Selection BinaryPort Enable/Disable Option SelectionHeader E1 and E2 IRQ selection Headers E9 and E10 in Normal Mode RS-232 Interface OptionsRS-422/485 Interface Options Headers E3 and E4, RS-485 Enable/Ground Selection Line TerminationInstallation Software InstallationHardware Installation Self-TestAppendix Circuit-Board Design PORT2 RP1 PORT1 SW2 SW1Appendix Circuit-Board Design U13 Copyright 2000. Black Box Corporation. All rights reserved
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IC113C, RS-485, IC175C specifications

The Black Box IC113C and IC175C are part of a series of versatile RS-485 interface converters designed to facilitate reliable data transmission over long distances. RS-485 is a standard defining the electrical characteristics of drivers and receivers for use in serial communications systems, and these specific Black Box converters exemplify the technology's adaptability and robustness.

The IC113C is an RS-485 to RS-232 converter, providing a seamless transition between these two common serial communication protocols. With a compact design, it boasts an operating temperature range of -40 to 85 degrees Celsius, making it suitable for harsh environmental conditions. Its key feature includes the ability to extend the communication distance up to 4,000 feet, which is ideal for industrial applications where devices may be far apart. Additionally, the IC113C includes built-in surge protection, ensuring that the device can withstand electrical noise and spikes, ultimately increasing the system's reliability.

On the other hand, the Black Box IC175C serves as an RS-485 to USB converter, bridging older serial devices with modern USB interfaces. This converter is critical for users wanting to connect legacy equipment to contemporary computing systems. Featuring a plug-and-play design, the IC175C is easy to install with no external power supply required, as it is powered directly through the USB connection. It also supports data rates up to 115.2 Kbps, ensuring fast and efficient data transfer.

Both models employ differential signaling, which enhances noise immunity and allows for greater transmission distances compared to single-ended communication standards. Furthermore, the converters support multiple nodes on the same bus, accommodating a network of devices without requiring complex wiring schemes.

In summary, the Black Box IC113C and IC175C offer essential features that cater to diverse industrial and commercial applications. With their robust construction, extensive operating ranges, and compatibility with various communication protocols, these converters enhance system interoperability and provide durable solutions for long-distance data communication needs. Whether connecting legacy systems or extending communication capabilities, these devices exemplify reliability and efficiency in modern data transmission technologies.
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