Quatech QSP-200/300 user manual Termination Resistors, Wire Operation

Page 44

6.4 Termination Resistors

No termination resistors are provided on the QSP-200/300 ports. Both output and input signals are connected only to the external connector. Any termination which is required must be added externally.

RS-422/485 Receiver

+RXD+ Rt

-RXD-

RS-422/485 Receiver

+AUXIN+

-AUXIN-

Recommended Termination Resistor Values

RS-422	RS-485
100 ohm 1/2W resistor	60 ohms total resistance
	(120 ohms at each end)

Figure 7. RS-422/485 Termination

6.5 2-Wire Operation

The QSP-200/300’s ports may be configured for either full duplex or half duplex operation. By default, the RS-422/485 ports are configured for full duplex operation with the RS-422/485 output drivers always enabled.

In half duplex mode, the RS-422/485 transmitter may be enabled and disabled via the RTS (request to send) or DTR (data terminal ready) signals. Both RTS and DTR are controlled through the Modem Control Register of the 16550.

QSP-200/300 User's Manual

Image 44

Contents Interface Cards for Personal Computers Product Description Four Channel RS-422/485 Pcmcia Adapter Warranty InformationQSP-200/300 Trademarks FCC Class B Compliances Electromagnetic EmissionsEC Council Directive 89/336/EEC Table of Contents This Page Left Blank Intentionally Introduction Windows 95/98/ME/2000/NT Installation Windows Windows 95/98Window Millennium ME Installing QSP-200/300 Under Windows NT Page Page Page Window 95/98/ME Page Changing Configuration of the QSP-200/300 Windows 95/98/MEPage IRQ 1Installing Quatech Pcmcia Cards under Windows CE Windows CEPage DOS / Windows 3.x Installation Client Driver Installation QSP-200/300 Client Driver for DOSCommand Line Options BaddressDTR Controlled QSP-200/300 Client Driver Examples ExampleDevice = C\QSP-200\QSP200CL.SYS i5,h,u,b300,o2 Device = C\QSP-200\QSP200CL.SYS s0,b300,i5 s1,b340,i10,o1 QSP-200/300 Enabler for DOS Common Problems Generic Client DriversMultiple Configuration Attempts Older Versions of Card and Socket ServicesPage Waddress Page QSP-200/300 Enabler Examples QSP200EN.EXE s0,b300,i5,r Common Problems Memory Range Exclusion Contention with Other DevicesCard and Socket Services Software Socket NumbersOS/2 Installation Drive\path\QSP200.SYS optionsCommand Line Options Configuring With System Assigned ResourcesConfiguring With User Assigned Resources Advanced Configuration Topics Monitoring The Status Of Pcmcia Cards Common Problems Invalid I/O Address When Using OS/2Insufficient Number Of Command Line Arguments Resources Not AvailableScratchpad / Interrupt Status Register Hardware InformationPort Addressing Auxiliary Channel Configuration Auxiliary Channel RTS-CTS HandshakingAuxiliary Channel Handshaking Disabled 2-Wire Operation Termination ResistorsOptions QSP-200/300 adapter cable to standard female D-9 connectors External ConnectionsThis Page Left Blank Intentionally Specifications QSP-200/300 Version March

QSP-200/300 specifications

Quatech QSP-200/300 is a robust series of serial device servers designed to facilitate seamless communication between legacy serial devices and modern Ethernet networks. These innovative solutions are engineered for industries that require reliable connection to serial peripherals, making them ideal for a range of applications including industrial automation, point-of-sale systems, and equipment monitoring.

One of the standout features of the QSP-200/300 series is its dual-port and quad-port configurations, which allow users to connect multiple serial devices simultaneously. This multi-port capability not only enhances connectivity options but also streamlines operations by reducing cabling complexity. Each model typically supports RS-232, RS-422, and RS-485 serial interfaces, catering to a wide array of serial devices.

The QSP series employs advanced technologies to ensure high performance and reliability. Utilizing a powerful ARM-based processor, these device servers can handle multiple data streams without compromising speed or efficiency. The QSP-200/300 also incorporates Ethernet technologies such as TCP/IP, UDP, and HTTP, ensuring versatile networking and easy integration into existing infrastructures.

Security is another crucial aspect of the QSP-200/300 series. Equipped with features like SSL/TLS encryption, the device servers offer secure data transmission, making them suitable for environments where sensitive information is processed. Furthermore, the device supports a variety of network protocols, including DHCP and Static IP, allowing for flexible deployment options in diverse network environments.

The installation of the QSP-200/300 is notably user-friendly, with a web-based interface that simplifies setup and configuration. Additionally, the units are designed for durability and longevity, built to withstand harsh industrial conditions with operating temperature ranges from -40°C to +70°C.

In summary, the Quatech QSP-200/300 series is a feature-rich solution that addresses the need for reliable serial-to-Ethernet conversion. Its multi-port capabilities, advanced processing technology, strong security features, and ease of installation position it as an optimal choice for organizations looking to modernize their connectivity solutions without discarding existing legacy devices.