16-channel RS485 Hub

The 16-channel RS485 isolation hub has 16 channels of completely electrically isolated RS485 channels, and each channel has an independent RS485 transceiver, which can realize the transparent transmission of  16 RS485 networks, and relieves the driving limit of the maximum number of RS485 transceiver nodes on the system bus. At the bus level, multi-point connection with complex structure is realized, so that the backbone network has no branch length limit, and users can use flexible wiring mode.

Each port of 16-channel RS485 isolation hub adapts to the baud rate of 0 ~ 115200bps. All channels work at the same baud rate, and the channel transmission delay is very small. It meets RS485 standard and supports transparent and protocol independent RS485 message transmission, which makes it suitable for a variety of applications, such as Modbus protocol. If you want to connect PC and other monitoring equipment into the network, the upper port of 16-channel RS485 isolation hub can be configured with RS232 port, so that you do not need to install additional RS485 to RS232 transfer equipment. When lightning strike or equipment failure occurs, the network segment with problems will be isolated to ensure the normal operation of other network segments. This performance greatly improves the reliability of the existing RS485 network and effectively shortens the maintenance time of the network.

Each channel of 16-channel RS485 isolation hub has 6kV lightning protection capability, photoelectric isolation, isolation voltage up to 2.5KV, and each channel has an independent ground, so that when one channel RS485 bus is damaged, other devices on RS485 bus can be protected, each RS485 port can carry 128 at most, and each RS485 port, power supply and RS232 port also has 6kV lightning protection capability. 16-channel RS485 isolation hub provides you with a first-line solution to minimize the difficulty of your networking project, improve efficiency, protect communication products and increase reliability.

●  Based on FPGA design, it can automatically generate accurate RS485 transceiver switching enable signal according to the data sent, and can automatically detect and control RS-485 data flow, which is far superior to the ordinary Schmidt trigger enable generation mode;

●  Each RS485 has 6kV lightning protection capability, 2.5KV photoelectric isolation, and each RS485 has independent shielding wire ground interface and LED indicator light for receiving and transmitting;

●  Each RS485 channel can load at least 32 standard nodes or 128 enhanced nodes;

●  When lightning strike or equipment failure occurs, the network segment with problems will be isolated to ensure the normal operation of other network segments

●  The upper connection port RS232 / 422 / 485 can be selected, and the baud rate is 0-115200bps

●  The isolation voltage of 2500V DC-DC power supply is used for power supply, and the serial port power stealing is not used, which improves the applicability of the equipment. The communication signal is isolated by high-speed optocoupler

●  Support wide range of 9-55v AC and DC power input;

●  Support internal isolation, redundant dual power input;

●  The power supply supports overload protection and anti reverse connection protection;

●  It meets the requirements of industrial grade IV electromagnetic compatibility;

●  Strong lightning protection function: anti lightning, anti induced high voltage, anti surge, etc;

●  No fan, efficient heat dissipation, reduce the repair time;

●  Anodized aluminum alloy shell, IP40 protection grade, can withstand the test of harsh environment;

●  Guide rail or wall mounted installation;

●  Wide temperature type: working temperature – 40 ℃ ~ + 85 ℃;

●  All models have passed the 100% toaster test.

● Serial

EIA/TIA-232 RS-232 (ITU-T V.28)

EIA/TIA-422 RS-422 (ITU-T V.11)

EIA/TIA-485 RS-485 (ISO/IEC8284)

Serial interface:

RS-422: TxD+ TxD- RxD+ RxD-

RS-485 4 wires: TXD + TXD – RXD + RXD – RS-485 2 wires: a (corresponding to TX +) B (corresponding to TX -) GND

RS-232: RXD TXD GND

● Environmental indicators               

Working temperature: – 40 ℃ – + 85 ℃

Storage temperature: – 40 ℃ – + 85 ℃

Working humidity: 0% – 95% (no condensation)

MTBF: > 100000 hours