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Can you use Ethernet cable for RS485?
cat5e can be used up to 100m ethernet link. it has 4 twisted pairs so technically you should be able to use it for RS485 or RS422. if using 485, you need two twisted pairs so remaining 4 wires can be used for power. 485 cable should be shielded but twisted pairs of cat5e may work for some environments and baud rates.
What type of cable is used 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.
Is RS485 the same as CAT5?
While often shielded, CAT5 can be of the UTP type, meaning unshielded twisted pair. The “true” RS-485 cable you link to has two twisted pairs and a shield. While you may read that 120 Ohms is typical for RS-485, the termination network uses 120 Ohms between the differential pair and 2 * 680 Ohms to VCC and GND.
Can I use CAT5 cable for RS485?
Generally speaking CAT5 s fine for RS485. IME the first limit you hit is the series resistance driving a termination over a long cable.
What voltage does RS485 use?
3V to 5.5V
RS485/RS422 Transceivers Operate from 3V to 5.5V Supplies and Withstand ±60V Faults | Analog Devices.
What is a USB to RS485?
1 Description. The USB-RS485 cable is a USB to RS485 levels serial UART converter cable incorporating FTDI‟s FT232RQ USB to serial UART interface IC device which handles all the USB signalling and protocols. The cable provides a fast, simple way to connect devices with a RS485 interface to USB.
Which is the best RS-485 to Ethernet converter?
Ambetronics is leading manufacturer of RS-485 to Ethernet Converter. ERS-485 devices are ideal for applications and devices that require an efficient way of communicating with serial RS-485 devices over an Ethernet network.
What is the impedance of a RS-485 cable?
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 4 shows the cross-section of a four-pair, UTP cable typically used for two full-duplex networks.
How are nodes networked in the RS-485 standard?
The RS-485 standards suggests that its nodes be networked in a daisy-chain, also known as party line or bus topology (see Figure 1. In this topology, the participating drivers, receivers, and transceivers connect to a main cable trunk via short network stubs.
What kind of level detector is used for RS485?
The RS-485 signalling will be using the UART protocol at 115200 bps typical. The level detector circuit will be consist mainly of an MCU (probably atmega328p) and an HC-SR04 ultrasonic module. (I am open to using any less complex low-power MCU.)