即具有多站能力,这样用户可以利用单一的RS-485接口方便地建立起设备网络 因RS-485接口具有良好的抗噪声干扰性,长的传输距离和多站能力等上述优点就使其成为首选的串行接口。因为RS485接口组成的半双工网络一般只需二根连线,所以RS485接口均采用屏蔽双绞线传输 RS485接口连接器采用DB-9的9芯插头座,与智能终端RS485...
Product Description RS-485, 2 Pair 24AWG (7x32) Tinned Copper, FEP Insulation, Overall Beldfoil®+Tinned Copper Braid(90%) Shield, PVC Outer Jacket, CMP Technical SpecificationsProduct OverviewSuitable Applications:RS-485, POS; Computer communications; Low Voltage Analog Signals (4-20ma, 0-10v...
RS485_D- Technical Specifications Table 1-3343 describes the technical specifications of the serial cable. Table 1-3343 Technical specifications of the serial cable Item Specification Connector (X1) RJ45 connector Cable type Category-5 unshielded twisted pairs (UTP-5) or shielded twisted pairs (STP...
The RS-485 specification specifies 1 32 12 kΩ the capability to sustain up to 32 ULs. ½ 64 24 kΩ ¼ 128 48 kΩ Some RS-485 receivers are specified as having ¼ UL or ⅛ 256 96 kΩ ⅛ UL. A receiver specified to have ¼ UL means that the receiver only loads the ...
All peak values of voltages are approximate.Chapter 2: System ConfigurationNetwork TopologiesNetwork configuration isnt defined in the RS-422 or RS-485 specification. In most cases the designer can use a configuration that best fits the physical requirem 33、ents of the system.Two Wire or Four ...
RS-485 and RS-422 Standards PROFIBUS PROFIBUS is a communication standard built upon an RS-485 type transceiver. It is intended for industrial control networks. The PROFIBUS specification covers the software protocol, the connector type, and a differential termination network. ...
Before applying the option, check your cable specification for proper impedance matching. You need to have administrator privileges to install any new drivers under Windows 7/ Vista / 2003 / XP / 2000. To install the driver or update the configuration please log onto Windows as "Administrator" ...
Depending on the geometry of the cable and the materials used in the insulation, twisted-pair wire will have a "characteristic impedance" associated with it that is usually specified by its manufacturer. The RS-485 specification recommends, but does not specifically dictate, that this characteristic...
RS-422-485协议英文介绍 Network Topologies Networkconfiguration isn’t defined in the RS-422 or RS-485 specification. In most cases the designer can use a configuration that best fits the physical requirements of the system. Two Wire or Four Wire Systems RS-422 systems require a dedicated pair...
specification. IIA A/A' Load B/B' vIA vIB IIB II 1 mA –7V –3V VI +5V +12V 0.8 mA S0459-01 Figure 10. RS-485 U.L. Test Circuit and I/V Relationship 2.2.2 Open-Circuit Output Voltage (VOD, VOA, and VOB Measured) The output voltage shall not exceed ±6 V under unloaded ...