What is an RS485 cable?

What is an RS485 cable?

RS-485 is an industrial specification that defines the electrical interface and physical layer for point-to-point communication of electrical devices. The RS-485 standard allows for long cabling distances in electrically noisy environments and can support multiple devices on the same bus.

What is the difference between EIA 485 and RS485?

EIA-485 (formerly RS-485 or RS485) is a specification for the physical layer of a network that uses the difference in voltages between two wires (Three wire) to conveys data. One polarity of voltage indicates a logic 1, the reverse polarity indicates logic 0.

What type of wire is used for BACnet?

(CAT5, CAT5E, CAT6 network cable has excellent specifications and will work in almost any BACnet MS/TP application.) BACnet MS/TP networks must be wired in a daisy chain configuration. A daisy chain means that there is only one main cable, and every network device is connected directly along its path.

Is RS485 cable twisted pair?

Industrial RS-485 cables are of the sheathed, unshielded, twisted-pair type, (UTP), with a characteristic impedance of 120 W and 22–24 AWG. Figure 5-1 shows the cross-section of a four-pair, UTP cable typically used for two full-duplex networks.

What cable should I use for RS485?

A good economical solution for field wiring is to use CAT5 or CAT6 twisted pair cable. Connect each twisted pair to the same set of signal pins – TX+/TX- would be one pair of conductors, RX+/RX- another pair of conductors, and GND a third pair of conductors.

Does BACnet use RS-485?

The BACnet MS/TP protocol uses EIA-485 (RS-485) as the physical layer standard for data transmission.

Is RS-485 the same as BACnet?

BACnet MSTP uses RS485 (also known as EIA485) as it physical layer.

Can I use CAT6 for RS485?

Definitely yes, the CAT5/5E or CAT6 cable is perfect for industrial use of RS485 network.

Can you use CAT6 for RS485?