PWBS-01S, tree star RS485, long distance RS485

GENERAL DESCRIPTION

This RS485 POWER BUS module ^[1] can provide DC power beyond the ready RS485 lines. Every terminal can get 0~48W power, totally hundreds watt. If set the power level well on every terminal, it will support stable communication for 512 points. Transparent communication from host to remote site by RS485 half-duplex mode, it also has no packet limit for the data transceiver. PWBS series modules can support stable work in 3000m long distance and times longer distance than 3km by repeater topology. Strong anti-interference ability ^[2] makes robustness communication result with no limit on wire type, and supports both of twisted-pair cable and parallel wires. PWBS modules solution also permits the POWER BUS working through next to 220VAC lines. There is 1KV isolation between the host module`s RS485 interface and power transmission side. Stable work on tree network and others any network. Because of the unique principle of this technology, it can pass through the test of surging at 4KV level, EFT (Electrical Fast Transient) at 2KV level, conducted interference at class 3 ^[3]. PWBS series module adopts shell with guide rail which can be easy to assemble on industry field directly.

[1] This is different with traditional RS485 technology

[2] Customer can only use the stable communication function, not use the DC POWER transmission function.

[3] All the tests mean on the POWER BUS line, not RS485 interface.

Supports tree and star network topology

KEY FEATURES

• High power two wires BUS. Provides RS485 half-duplex communication and DC power on only two wires. No polarity on POWER BUS.
• 9600bps (H1 Host module),2400bps(H2 Host module)
• Every terminal supports 0~48 watt(Need to consider the voltage drop on wires)
• Provide DC power transmission over ready RS485 network
• Provide RS485 transceiver over ready DC power line
• Overcome the weakness of RS485 which can only use twisted-pair cable. PWBS modules have no limit on cable type, also support parallel wires.
• Overcome the weakness of RS485 which can`t work in free network. PWBS modules support tree network and any other network
• Overcome the weakness of RS485 which can`t work in long distance. PWBS modules support 3000m table work. If repeater function used, there will be times long than 3000m.
• Support 512 terminals
• Host module permits 960 watt transmission (H2), or 240 watt (H1)
• ^[2]Easy to pass through the surging test at 4KV, EFT at 2KV,conducted interference at Class3