What is an RS-485 connector?

What is an RS-485 connector?

RS-485 is a serial communications standard that provides asynchronous communication capabilities, such as hardware flow control, software flow control, and parity check. It has been widely used for decades.

What does RS-485 stand for?

RS-485, also known as TIA-485(-A) or EIA-485, is a standard defining the electrical characteristics of drivers and receivers for use in serial communications systems. Electrical signaling is balanced, and multipoint systems are supported.

What type of cable is used for RS-485?

The most common cable type is Cat 5e-UTP (unshielded twisted pair) which may work over shorter distances in less demanding applications with low EMI noise levels. Be sure to use a wire pair such as the blue and blue/white pair for the data lines and a third wire or pair twisted together for the common connection.

Can I use CAT6 for RS-485?

A good economical solution for field wiring is to use CAT5 or CAT6 twisted pair cable.

What is EIA 485 cable?

EIA-485 is basically a specification for the drivers, receivers and transceivers attached to the network. Therefore, parameters such as unit loads, output drive, short circuit current and common mode voltage are specified.

How many RS485 devices can be on a single network?

Up to 32 devices can be connected via the same RS-485 bus, though only one device can “talk” at any given time (half-duplex). A voltage of -200 mV is specified as a logic 1, while +200 mV is specified as a logic 0.

How many wires are needed for RS485?

RS485 needs 3 conductors and a shield. Many people say it’s a two-wire network but it is not. Two conductors are used to carry the RS485 Differential voltage signal. The Shield is connected to earth/ground at one end only and provides shielding against induced noise.

What is RS485 connection?

I am a responsible, intelligent and experienced business professional with an extensive background in the electronics industry. RS485 connection is a standard definition for serial interface electrical features used in serial communication systems.

What are the device requirements for RS-485 and Tri-State?

All of the devices must be RS-485 and Tri-state since the same wire pair to the Receiver must be shared by the Transmitters of all the devices. The advantage of the 4-wire connection is that all devices only see commands from the Master, and no Device sees the responses from other devices. Turn-around delay is also not required.

What are the RS485 termination resistors?

The RS485 employs a set of 120 Ohm termination resistors located at each end of the line. This is necessary to allow long-distance data transmission. A description of the RS485 technical specifications is provided in the following table.

Can a RS-422 device be used with a 485bat3 or 485cor?

A RS-422 device does not tri-state the transmitter so it cannot use these connections. Some Converter models are: 485BAT3, 485COR, 485CON, 485COSR, 485COSN, 485CSP2, 485TBLED, 485LP9N, 485LP9, P485BTB1, 485HSPR.