Rs485 - Teltonika RUT955 User Manual

RUT955 User's Manual
9.6.2

RS485

RS-485 is a different serial data transmission standart for use in long ranges or noisy environments.
Field name Possible values
1. Enabled Enable/Disable
2. Baud rate 300/1200/2400/4800/9600/
19200/38400/57600/115200
3. Parity None / Odd / Even
4. Flow control None/RTS-CTS/Xon-Xoff
5. Serial type Console/Over IP/Modem/
Modbus Gateway/NTRIP Client
6. Interface LAN/ WAN/
VPN/L2TP/PPTP/GRE/HOTSPOT
7. Allow IP 192.168.1.102
9.6.2.1 Maximum data rate vs. transmission line length
RS-485 standart can be used for network lengths up to 1200 meters, but the maximum usable data rate decreases
as the transmission length increases. A device operating at the maximum data transfer rate (10Mbps) is limited to a
transmission length of about 12 meters, while the 100kbps data rate can achieve a distance up to 1200 meters. A rough
relation between maximum transmission length and data rate can be calculated using this approximation:
Where Lmax is the maximum transmission length in meters and DR is maximum data rate in bits per second.
Twisted pair is the prefered cable type for RS-485 networks. Twisted pair cables pick up noise and other
electromagnetically induced voltages as common mode signals, which are rejected by the differential receivers.
Teltonika Solutions
Explanation
Check the box to enable the serial port function
Select the communication speed of the serial interface
Parity bit setting is used for error detection during data transfer
Specifies what kind of characters are to be used for flow control
Specifies the function of the serial interface
Interface used for connection
Allow IP connecting to server
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