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Description: The purpose of this application note is to describe the main elements of
an RS-422 and RS-485 system. This application note attempts to cover
enough technical details so that the system designer will have considered all
the important aspects in his data system design. Since both RS-422 and RS-
485 are data transmission systems that use balanced differential signals, it is
appropriate to discuss both systems in the same application note. Throughout
this application note the generic terms of RS-422 and RS-485 will be used to
represent the EIA/TIA-422 and EIA/TIA-485 Standards.-The purpose of this application note is to d escribe the main elements of an RS-422 and RS-48 5 system. This application note attempts to cov er enough technical details so that the system d esigner will have considered all the important aspects in his data system design. Since both RS-422 and RS-485 data transmission systems are not hat use balanced differential signals. it is appropriate to discuss both systems in the same application note. Throughout this applic ation note terms of the generic RS-422 and RS-48 5 will be used to represent the EIA/TIA-422 and E. IA/TIA-485 Standards.
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Author: yzodong |
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Description: MAX220–MAX249系列线驱动器/接收器，专为EIA/TIA-
232E以及V.28/V.24通信接口设计，尤其是无法提供±12V
电源的应用。
这些器件特别适合电池供电系统，这是由于其低功耗
关断模式可以将功耗减小到5μW以内。MAX225、
MAX233、MAX235以及MAX245/MAX246/MAX247
不需要外部元件，推荐用于印刷电路板面积有限的
应用。
-MAX220-MAX249 family of line driver/receiver, designed for EIA/TIA-232E and V.28/V.24 communication interface design, especially unable to provide ± 12V power supply applications. These devices are particularly suitable for battery-powered systems, this is because of its low-power shutdown mode power consumption can be reduced to less than 5μW. MAX225, MAX233, MAX235 and MAX245/MAX246/MAX247 the need for external components, recommended for the limited area of the printed circuit board applications.
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Size: 532480 |
Author: wang ty |
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Description: The MAX220–MAX249 family of line drivers/receivers is
intended for all EIA/TIA-232E and V.28/V.24 communications
interfaces, particularly applications where ±12V is
not available.
These parts are especially useful in battery-powered systems,
since their low-power shutdown mode reduces
power dissipation to less than 5μW. The MAX225,
MAX233, MAX235, and MAX245/MAX246/MAX247 use
no external components and are recommended for applications
where printed circuit board space is critical
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Size: 532480 |
Author: paradise |
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Description: 422 and 485 Standards Overview and System Configurations.
ANSI TIA/EIA-422 and TIA/EIA-485 standards, commonly known as 422 and 485,
respectively. Techniques for impedance matching to minimize line
reflections in several applications are presented, with laboratory test results.
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Size: 241664 |
Author: wsh |
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Description: This document describes the MODBUS over Serial Line protocol. MODBUS Serial Line protocol is a Master-Slave protocol. This
protocol takes place at level 2 of the OSI model.
A master-slave type system has one node (the master node) that issues explicit commands to one of the "slave" nodes and processes
responses. Slave nodes will not typically transmit data without a request from the master node, and do not communicate with other
slaves.
At the physical level, MODBUS over Serial Line systems may use different physical interfaces (RS485, RS232). TIA/EIA-485 (RS485)
Two-Wire interface is the most common. As an add-on option, RS485 Four-Wire interface may also be implemented. A TIA/EIA-232-
E (RS232) serial interface may also be used as an interface, when only short point to point communication is required. (see chapter
"Physical Layer")
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Author: RAMAKERS_R |
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Description: 综合布线系统的标准,综合布线系统布线时参考- Generic Cabling System standard,
reference by wiring cabling system
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Size: 309248 |
Author: 邓昌建 |
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Description: MAX232芯片是美信公司专门为电脑的RS-232标准串口设计的接口电路,使用+5v单电源供电。-The MAX220–MAX249 family of line drivers/receivers is
intended for all EIA/TIA-232E and V.28/V.24 communications
interfaces, particularly applications where ±12V is
not available.
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Size: 380928 |
Author: 肖铎 |
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Description: RS-485 transceiver with electrical data isolation
Complies with ANSI TIA/EIA RS-485-A and ISO 8482: 1987(E)
500 kbps data rate
Slew rate-limited driver outputs
Low power operation: 2.5 mA max
Suitable for 5 V or 3 V operations (VDD1)
High common-mode transient immunity: >25 kV/μs
True fail-safe receiver inputs
Chatter-free power-up/power-down protection
256 nodes on bus
Thermal shutdown protection
Safety and regulatory approvals
UL recognition: 2500 Vrms for 1 minute per UL 1577
CSA Component Acceptance Notice #5A
VDE Certificate of Conformity
DIN EN 60747-5-2 (VDE 0884 Rev. 2): 2003-01
DIN EN 60950 (VDE 0805): 2001-12 EN 60950: 2000
VIORM = 560 V peak
Operating temperature range: − 40°C to +85°C -RS-485 transceiver with electrical data isolation Complies with ANSI TIA/EIA RS-485-A and ISO 8482: 1987 (E) 500 kbps data rate Slew rate-limited driver outputs Low power operation: 2.5 mA max Suitable for 5 V or 3 V operations (VDD1) High common-mode transient immunity:> 25 kV/μs True fail-safe receiver inputs Chatter-free power-up/power-down protection 256 nodes on bus Thermal shutdown protection Safety and regulatory approvals UL recognition: 2500 Vrms for 1 minute per UL 1577 CSA Component Acceptance Notice# 5A VDE Certificate of Conformity DIN EN 60747-5-2 (VDE 0884 Rev. 2): 2003-01 DIN EN 60950 (VDE 0805): 2001-12 EN 60950: 2000 VIORM = 560 V peak Operating temperature range:-40 ° C to+85 ° C
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Size: 200704 |
Author: houly |
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Description: MODBUS协议中文版(高清版)
串行链路和TCP/IP 上的MODBUS标准介绍
该标准包括两个通信规程中使用的MODBUS 应用层协议和服务规范：
·串行链路上的MODBUS
MODBUS串行链路取决于TIA/EIA标准：232-F和485-A。
·TCP/IP上的MODBUS
MODBUS TCP/IP取决于IETF标准：RFC793 和RFC791有关。-MODBUS protocol Chinese Version (HD version) serial link and TCP/IP on the introduction of the standard MODBUS standard includes two MODBUS communication protocol used in the application layer protocol and service specification: serial link MODBUS MODBUS serial link depends TIA/EIA standards :232-F and 485-A. TCP/IP on the MODBUS MODBUS TCP/IP depends on IETF standards: RFC793 and RFC791 related.
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Author: Roberto |
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