The Registered Jack (RJ) is a connector specifically designed for networking applications. The standard defines only the wiring pattern of the connector, not the geometry or gender. The term ‘Jack’ refers to the female connector even though the standard does not differentiate the gender of the connector. These connectors are also referred to as “modular connectors” as they were helpful in making the telephone network of early days more modular. The RJ standard is primarily defined for the wiring of telephone networks. The connectors following RJ standard wiring pattern are called RJ connector and are available in both male and female types. There is large number of RJ standard connectors available like, RJ11, RJ14, RJ21, RJ45 etc.
Fig. 1:图片ofa RJstandard female connector
Fig. 2: Image ofa RJstandard male connector
The modular connectors are commonly identified by their ‘contact’ number and their ‘position’ number. The number of contacts refers to the total number of pins in the connector and the number of positions refers to the total number of positions available in which the contacts can be installed in a connector. The number of positions of a connector hence indirectly refers to the actual size of a connector. The modular connectors are defined in four basic sizes, four, six, eight and ten. The 6 position connector with 4 contacts is called 6P4C and an 8 pin connector with 8 contacts is called 8P8C and so on.
现在,让我们看一下一些常见的RJ连接器,它们的应用和插针。
The pin position of female modular connector from 4 positions to 10 positions is shown in the following figure.
RJ11连接器
RJ11
RJ11标准连接器使用6P2C,6位置2触点模块连接器。它们通常用作电话电缆连接器。它还可以用作拨号调制解调器的连接器,该连接器最多可运行56 kbps的数据速度。
The pin-out of the 6P2C connector as RJ11
PIN 1 ——————à Absent
引脚2 ——————à缺席的
PIN 3 ——————R1
引脚4 ——————àt1
PIN 5 ——————à Absent
PIN 6 ——————à Absent
RJ 14连接器
RJ14
RJ14标准connectors use a 6P4C, 6 position 4 contact modular connector. They are very commonly used as 2 line telephone cable connector and also as modem connector in computers. The image of a RJ14 standard connector is shown in the following figure.
Fig. 5:图片of Male and Female RJ14 connector
6P4C连接器的引脚作为RJ14
PIN 1 ——————à Absent
引脚2 ——————àT2
PIN 3 ——————R1
引脚4 ——————àt1
PIN 5 ——————à R2
PIN 6 ——————à Absent
RJ 25连接器
RJ25
The RJ25 standard connectors use a 6P6C, 6 position 6 contact modular connector. They are very commonly used as 3 line telephone cable connector. The image of a RJ25 standard connector is shown in the following figure.
Fig. 6: Image of Male and Female RJ25 connector
6P4C连接器的引脚作为RJ25
PIN 1 ——————T3
引脚2 ——————àT2
PIN 3 ——————R1
引脚4 ——————àt1
PIN 5 ——————à R2
PIN 6 ——————à R3
RJ 45 Connector
RJ45
The RJ45 standard connectors use 8P8C, 8 position 8 contact modular connector. They are famous for their use as an Ethernet cable connector. This connector can be used with all kind of Ethernet cables including Ethernet (10 Mbps), Fast Ethernet (100 Mbps) and Gigabit Ethernet (1 Gbps). The image of a RJ45 standard connector is shown in the following figure.
Fig. 7:男性和女性RJ45的图像Connnectors
8p8c连接器的引脚作为RJ45
PIN 1 ——————àTX_D1 +
引脚2 ——————àTX_D1 –
PIN 3 ——————àRx_d2 +
引脚4 ——————Bi_d3 +
PIN 5 ——————Bi_d3 -
PIN 6 ——————à RX_D2 –
引脚7 ——————Bi_d4 +
PIN 8 ——————Bi_d4 -
TX_D: Transmit data
RX_D:接收数据
BI_D: Bi-directional data
Sample specification:
Insulation Resistance ——————— 500M? min. at 100V DC
Withstanding Voltage ——————– 1,000Vrms min. 60Hz
Contact Resistance ————————– 30m? max.
Operating Temp. —————————– Range: –30°C to +70°C
Mating Cycles ——————————– 1,000 insertions
概括
{C}{C}{C}{C}{C}{C}·{C}{C}{C}{C}{C}{C}Registered Jack (RJ) is a standard defined for wiring of telephone network cables
{C}{C}{C}{C}{C}{C}·{C}{C}{C}{C}{C}{C}模块化连接器用作保持RJ标准的连接器
{C}{C}{C}{C}{C}{C}·{C}{C}{C}{C}{C}{C}RJ45标准使用8P8C模块化连接器作为流行以太网连接器
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